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https://github.com/gnustep/libs-gui.git
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bef430bc83
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@12857 72102866-910b-0410-8b05-ffd578937521
3099 lines
77 KiB
Objective-C
3099 lines
77 KiB
Objective-C
/** <title>NSLayoutManager</title>
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<abstract>The text layout manager class</abstract>
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Copyright (C) 1999 Free Software Foundation, Inc.
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Author: Jonathan Gapen <jagapen@smithlab.chem.wisc.edu>
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Date: July 1999
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Author: Michael Hanni <mhanni@sprintmail.com>
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Date: August 1999
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Author: Richard Frith-Macdonald <rfm@gnu.org>
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Date: January 2001
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This file is part of the GNUstep GUI Library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; see the file COPYING.LIB.
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If not, write to the Free Software Foundation,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <AppKit/NSLayoutManager.h>
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#include <AppKit/NSParagraphStyle.h>
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#include "GSSimpleLayoutManager.h"
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#include <AppKit/NSWindow.h>
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#include <Foundation/NSException.h>
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#define USE_GLYPHS 0
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#define ALL_CHECKS 0
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#define BOTH (NSTextStorageEditedCharacters | NSTextStorageEditedAttributes)
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#if ALL_CHECKS
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static void missmatch(SEL s)
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{
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NSLog(@"Missmatch in %@", NSStringFromSelector(s));
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}
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#endif
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/*
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* Glyph attributes known to the layout manager.
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*/
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typedef enum {
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GSGlyphDrawsOutsideLineFragment,
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GSGlyphIsNotShown,
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GSGlyphGeneration,
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GSGlyphInscription,
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} GSGlyphAttributes;
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typedef union {
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/*
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* A structure to hold information about a glyph in the glyph stream
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* NB. This structure should be no more than 64 bits, so it can fit
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* in as a GSIArray element of the same size as the NSRange structure
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* used to hold gap information.
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*/
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struct {
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unsigned offset:24; // characters in from start of chunk
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unsigned drawsOutsideLineFragment:1; // glyph bigger than fragment?
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unsigned isNotShown:1; // glyph invisible (space, tab etc)
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unsigned inscription:3; // NSGlyphInscription info
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unsigned generation:3; // Other attributes
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NSGlyph glyph; // The glyph itsself
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} g;
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NSRange r; // A range of invalidated glyphs (gap)
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} GSGlyphAttrs;
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#define gRange(A) ((A).ext.r)
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#define gGlyph(A) ((A).ext.g.glyph)
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#define gOffset(A) ((A).ext.g.offset)
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#define gDrawsOutside(A) ((A).ext.g.drawsOutsideLineFragment)
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#define gIsNotShown(A) ((A).ext.g.isNotShown)
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#define gInscription(A) ((A).ext.g.inscription)
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#define gGeneration(A) ((A).ext.g.generation)
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/*
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* We need a fast array that can store -
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* pointers, objects, glyphs (long) and attributes.
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*/
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#define GSI_ARRAY_TYPES GSUNION_PTR|GSUNION_OBJ|GSUNION_INT|GSUNION_LONG
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#define GSI_ARRAY_TYPE GSGlyphAttrs
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/*
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* We handle retain/release explicitly, so we can use GSIArrays to hold
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* non-object values.
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*/
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#define GSI_ARRAY_NO_RELEASE 1
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#define GSI_ARRAY_NO_RETAIN 1
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#ifdef GSIArray
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#undef GSIArray
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#endif
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#include <base/GSIArray.h>
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/*
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* The glyph attributes within a chunk must be ordered by their offset fields,
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* so we can use a binary search to find the item for a particular offset.
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*/
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static NSComparisonResult
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offsetSort(GSIArrayItem i0, GSIArrayItem i1)
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{
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if (gOffset(i0) < gOffset(i1))
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return NSOrderedAscending;
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else if (gOffset(i0) > gOffset(i1))
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return NSOrderedDescending;
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else
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return NSOrderedSame;
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}
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/*
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* Glyph management implementation notes (January 2001)
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* Author - Richard Frith-Macdonald <rfm@gnu.org>
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*
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* An NSLayoutManager object maintains a 'glyph stream' which contains the
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* actual symbols to be displayed in text. This glyph stream is conceptually
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* an array of glyphs and certain attributes.
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*
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* Each glyph has an associated index of the corresponding character in the
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* text storage object. Since more than one character may map to a single
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* glyphs, the character index for a glyph is the index of the first
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* character corresponing to the glyph. Since more than one glyph may map
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* on to the same character, adjacent glyphs in the glyph stream may have
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* the same character index.
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*
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* Other attributes of a glyph include flags to say whether the glyph is to
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* be drawn or not, and how it should be layed out with respect to the
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* preceeding glyph in the stream (allowing for overstrike etc).
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*
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* Since the state of the text storage object may change, glyphs may be
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* deleted from the stream from time to time, leaving a situation where
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* not all characters in the text storage have corresponding glyphs in
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* the glyph stream. This state is called a 'gap'. We maintain an array
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* of the locations of the gaps in the glyph stream. When we attempt to
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* access a glyph, we must generate new glyphs from the text storage to
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* fill any gaps in the glyphs stream and insert them into the stream.
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*
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*
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* The glyph stream is actually implemented as an array of 'chunks' -
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* where a chunk contains an array of glyphs, and array of the glyph
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* attributes, and the glyph and character indices of the first glyph
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* in the chunk. The remaining character/glyph indices are calculated
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* as offsets from the first glyph in the chunk.
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*
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* This implementation is used for speed of manipulation of very large
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* documents - modifications to a single chunk may have their effects
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* to some degree localised to that chunk.
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*
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* Invariants ...
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* 1. The glyph stream is a continuous array of glyphs ranging from 0 up.
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* 2. The character index of a glyph in the glyph stream is greater than
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* or equal to that of the glyph that preceeds it.
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* 3. The gap array contains ranges of invalidated glyphs in numeric order
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* and where no index exceeds the length of the glyph stream.
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* 4. The glyph stream consists of at least one chunk whose glyph index
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* is zero.
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*/
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/*
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* Structure to handle the storage of the glyph stream.
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* This is done as an array of chunks.
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* Each chunk contains an array of glyphs and corresponding attributes.
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*/
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typedef struct {
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unsigned charIndex; // Index of character at start of chunk
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unsigned glyphIndex; // Index of glyph at start of chunk
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GSIArray_t glyphs; // Array of glyphs and their attributes.
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} GSGlyphChunk;
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/*
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* The glyph chunks must be ordered by their charIndex offset fields,
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* so we can use a binary search to find the item for a particular
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* character index.
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*/
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static NSComparisonResult
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charIndexSort(GSIArrayItem i0, GSIArrayItem i1)
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{
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if (((GSGlyphChunk*)(i0.ptr))->charIndex
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< (((GSGlyphChunk*)(i1.ptr))->charIndex))
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return NSOrderedAscending;
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else if (((GSGlyphChunk*)(i0.ptr))->charIndex
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> (((GSGlyphChunk*)(i1.ptr))->charIndex))
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return NSOrderedDescending;
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else
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return NSOrderedSame;
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}
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/*
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* The glyph chunks must be ordered by their glyphIndex offset fields,
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* so we can use a binary search to find the item for a particular
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* glyph index.
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*/
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static NSComparisonResult
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glyphIndexSort(GSIArrayItem i0, GSIArrayItem i1)
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{
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if (((GSGlyphChunk*)(i0.ptr))->glyphIndex
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< (((GSGlyphChunk*)(i1.ptr))->glyphIndex))
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return NSOrderedAscending;
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else if (((GSGlyphChunk*)(i0.ptr))->glyphIndex
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> (((GSGlyphChunk*)(i1.ptr))->glyphIndex))
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return NSOrderedDescending;
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else
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return NSOrderedSame;
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}
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/*
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* Glyph management functions.
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*/
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static GSGlyphChunk*
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GSCreateGlyphChunk(unsigned glyphIndex, unsigned charIndex)
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{
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GSGlyphChunk *chunk;
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chunk = NSZoneMalloc(NSDefaultMallocZone(), sizeof(GSGlyphChunk));
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chunk->charIndex = charIndex;
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chunk->glyphIndex = glyphIndex;
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GSIArrayInitWithZoneAndCapacity(&chunk->glyphs, NSDefaultMallocZone(), 8);
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return chunk;
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}
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static void
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GSDestroyGlyphChunk(GSGlyphChunk *chunk)
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{
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GSIArrayClear(&chunk->glyphs);
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NSZoneFree(NSDefaultMallocZone(), chunk);
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}
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static unsigned
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GSChunkForCharIndex(GSIArray chunks, unsigned charIndex)
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{
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unsigned pos;
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GSGlyphChunk tmp;
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tmp.charIndex = charIndex;
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pos = GSIArrayInsertionPosition(chunks, (GSIArrayItem)(void*)&tmp,
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charIndexSort);
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/*
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* pos is the index of the next chunk *after* the one we want,
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* unless we want something in the very first chunk.
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*/
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if (pos > 0)
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{
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pos--;
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}
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return pos;
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}
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static unsigned
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GSChunkForGlyphIndex(GSIArray chunks, unsigned glyphIndex)
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{
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unsigned pos;
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GSGlyphChunk tmp;
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tmp.glyphIndex = glyphIndex;
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pos = GSIArrayInsertionPosition(chunks, (GSIArrayItem)(void*)&tmp,
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glyphIndexSort);
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/*
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* pos is the index of the next chunk *after* the one we want,
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* unless we want something in the very first chunk.
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*/
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NSCAssert(pos > 0, @"No glyph chunks present");
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if (pos > 0)
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{
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pos--;
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}
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return pos;
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}
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/*
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* Medium level functions for accessing and manipulating glyphs.
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*/
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typedef struct {
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@defs(NSLayoutManager)
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} *lmDefs;
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#define glyphChunks ((GSIArray)_glyphData)
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#define _chunks ((GSIArray)(((lmDefs)lm)->_glyphData))
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#define _chunk ((GSGlyphChunk*)(((lmDefs)lm)->_currentGlyphs))
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#define _gindex (((lmDefs)lm)->_glyphIndex)
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#define _cindex (((lmDefs)lm)->_chunkIndex)
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#define _offset (((lmDefs)lm)->_glyphOffset)
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#define _gaps ((GSIArray)(((lmDefs)lm)->_glyphGaps))
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static BOOL _Back(NSLayoutManager *lm);
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static unsigned _CharEnd(NSLayoutManager *lm);
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static unsigned _CharIndex(NSLayoutManager *lm);
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static unsigned _GlyphEnd(NSLayoutManager *lm);
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static unsigned _GlyphIndex(NSLayoutManager *lm);
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static GSIArrayItem *_Info(NSLayoutManager *lm);
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static BOOL _JumpToChar(NSLayoutManager *lm, unsigned charIndex);
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static BOOL _JumpToGlyph(NSLayoutManager *lm, unsigned glyphIndex);
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static BOOL _Step(NSLayoutManager *lm);
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/*
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* Move 'current' glyph index back one place in glyph stream.
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* return NO on failure (start of stream).
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*/
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static inline BOOL
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_Back(NSLayoutManager *lm)
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{
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if (_offset > 0)
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{
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_offset--;
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_gindex--;
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return YES;
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}
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else if (_cindex > 0)
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{
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_cindex--;
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_chunk = (GSGlyphChunk*)GSIArrayItemAtIndex(_chunks, _cindex).ptr;
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_offset = GSIArrayCount(&_chunk->glyphs) - 1;
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_gindex--;
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return YES;
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}
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else
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{
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return NO;
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}
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}
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/*
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* Move 'current' glyph index forward one place in glyph stream.
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* return NO on failure (end of stream).
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*/
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static inline BOOL
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_Step(NSLayoutManager *lm)
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{
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if (_offset < GSIArrayCount(&_chunk->glyphs) - 1)
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{
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_offset++;
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_gindex++;
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return YES;
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}
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else
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{
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if (_cindex < GSIArrayCount(_chunks) - 1)
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{
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_cindex++;
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_chunk = (GSGlyphChunk*)GSIArrayItemAtIndex(_chunks, _cindex).ptr;
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_offset = 0;
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_gindex++;
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return YES;
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}
|
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else
|
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{
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return NO;
|
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}
|
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}
|
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}
|
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|
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/*
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* Adjust the character indices for all the glyphs from the specified
|
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* location onwards. Leave the current glyphs set to the 'from' location.
|
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*/
|
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static void
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_Adjust(NSLayoutManager *lm, unsigned from, int lengthChange)
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{
|
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if (_JumpToGlyph(lm, from) == YES)
|
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{
|
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GSGlyphChunk *chunk = _chunk;
|
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unsigned index = _cindex;
|
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unsigned offset = _offset;
|
||
|
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/*
|
||
* Adjust character offsets for all glyphs in this chunk.
|
||
*/
|
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if (offset > 0)
|
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{
|
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while (offset < GSIArrayCount(&chunk->glyphs))
|
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{
|
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gOffset(GSIArrayItems(&chunk->glyphs)[offset]) += lengthChange;
|
||
offset--;
|
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}
|
||
index++;
|
||
}
|
||
|
||
/*
|
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* Now adjust character offsets for remaining chunks.
|
||
*/
|
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while (index < GSIArrayCount(_chunks))
|
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{
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chunk = (GSGlyphChunk*)GSIArrayItemAtIndex(_chunks, index).ptr;
|
||
index++;
|
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chunk->charIndex += lengthChange;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Return the index of the character immediately beyond the last
|
||
* generated glyph.
|
||
*/
|
||
static inline unsigned
|
||
_CharEnd(NSLayoutManager *lm)
|
||
{
|
||
unsigned i;
|
||
|
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i = GSIArrayCount(_chunks);
|
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while (i-- > 0)
|
||
{
|
||
GSGlyphChunk *c;
|
||
unsigned j;
|
||
|
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c = (GSGlyphChunk*)GSIArrayItemAtIndex(_chunks, i).ptr;
|
||
j = GSIArrayCount(&c->glyphs);
|
||
if (j-- > 0)
|
||
{
|
||
return c->charIndex + gOffset(GSIArrayItemAtIndex(&c->glyphs, j)) + 1;
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* Return the glyph index immediately beyond the last generated glyph.
|
||
*/
|
||
static inline unsigned
|
||
_GlyphEnd(NSLayoutManager *lm)
|
||
{
|
||
unsigned i;
|
||
|
||
i = GSIArrayCount(_chunks);
|
||
while (i-- > 0)
|
||
{
|
||
GSGlyphChunk *c;
|
||
unsigned j;
|
||
|
||
c = (GSGlyphChunk*)GSIArrayItemAtIndex(_chunks, i).ptr;
|
||
j = GSIArrayCount(&c->glyphs);
|
||
if (j > 0)
|
||
{
|
||
return c->glyphIndex + j;
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* return the character index of the current glyph.
|
||
*/
|
||
static inline unsigned
|
||
_CharIndex(NSLayoutManager *lm)
|
||
{
|
||
return _chunk->charIndex
|
||
+ gOffset(GSIArrayItemAtIndex(&_chunk->glyphs, _offset));
|
||
}
|
||
|
||
/*
|
||
* return the index of the current glyph.
|
||
*/
|
||
static inline unsigned
|
||
_GlyphIndex(NSLayoutManager *lm)
|
||
{
|
||
return _chunk->glyphIndex + _offset;
|
||
}
|
||
|
||
/*
|
||
* Return the current glyph and attributes
|
||
*/
|
||
static GSIArrayItem *
|
||
_Info(NSLayoutManager *lm)
|
||
{
|
||
return GSIArrayItems(&_chunk->glyphs) + _offset;
|
||
}
|
||
|
||
/*
|
||
* Locate the first glyph corresponding to the specified character index
|
||
* and make it the current glyph.
|
||
*/
|
||
static BOOL
|
||
_JumpToChar(NSLayoutManager *lm, unsigned charIndex)
|
||
{
|
||
GSIArrayItem tmp;
|
||
GSGlyphChunk *c;
|
||
unsigned i;
|
||
unsigned o;
|
||
unsigned co;
|
||
|
||
i = GSChunkForCharIndex(_chunks, charIndex);
|
||
c = (GSGlyphChunk*)GSIArrayItemAtIndex(_chunks, i).ptr;
|
||
gOffset(tmp) = charIndex - c->charIndex;
|
||
o = GSIArrayInsertionPosition(&c->glyphs, tmp, offsetSort);
|
||
if (o == 0)
|
||
{
|
||
return NO; // Insertion position not found.
|
||
}
|
||
o--;
|
||
|
||
/*
|
||
* Check the character index of this glyph to see if it matches the
|
||
* character index we were asked for. If it doesn't we have probably
|
||
* failed to find a glyph matching the character.
|
||
*/
|
||
co = gOffset(GSIArrayItemAtIndex(&c->glyphs, o));
|
||
if (co + c->charIndex != charIndex)
|
||
{
|
||
if ([((lmDefs)lm)->_textStorage length] > charIndex)
|
||
{
|
||
NSRange r;
|
||
|
||
r = [[((lmDefs)lm)->_textStorage string]
|
||
rangeOfComposedCharacterSequenceAtIndex: charIndex];
|
||
if (r.length > 0 && r.location == co + c->charIndex)
|
||
{
|
||
/*
|
||
* The requested character is part of a composed character
|
||
* sequence whose first character maps on to the glyph we found.
|
||
*/
|
||
_chunk = c;
|
||
_cindex = i;
|
||
_offset = o;
|
||
_gindex = c->glyphIndex + o;
|
||
return YES;
|
||
}
|
||
}
|
||
return NO;
|
||
}
|
||
|
||
/*
|
||
* Locate the *first* glyph for this character index...
|
||
*/
|
||
while (o > 0 && gOffset(GSIArrayItemAtIndex(&c->glyphs, o-1)) == co)
|
||
{
|
||
o--;
|
||
}
|
||
_chunk = c;
|
||
_cindex = i;
|
||
_offset = o;
|
||
_gindex = c->glyphIndex + o;
|
||
return YES;
|
||
}
|
||
|
||
/*
|
||
* Make the specified glyph index the current glyph
|
||
*/
|
||
static BOOL
|
||
_JumpToGlyph(NSLayoutManager *lm, unsigned glyphIndex)
|
||
{
|
||
GSGlyphChunk *c;
|
||
unsigned i;
|
||
unsigned o;
|
||
|
||
/*
|
||
* Optimise for glyph index zero ... easy to find.
|
||
*/
|
||
if (glyphIndex == 0)
|
||
{
|
||
c = (GSGlyphChunk*)GSIArrayItemAtIndex(_chunks, 0).ptr;
|
||
if (GSIArrayCount(&c->glyphs) > 0)
|
||
{
|
||
_chunk = c;
|
||
_cindex = 0;
|
||
_offset = 0;
|
||
_gindex = 0;
|
||
return YES;
|
||
}
|
||
return NO;
|
||
}
|
||
|
||
i = GSChunkForGlyphIndex(_chunks, glyphIndex);
|
||
c = (GSGlyphChunk*)GSIArrayItemAtIndex(_chunks, i).ptr;
|
||
o = glyphIndex - c->glyphIndex;
|
||
if (o < GSIArrayCount(&c->glyphs))
|
||
{
|
||
_chunk = c;
|
||
_cindex = i;
|
||
_offset = o;
|
||
_gindex = glyphIndex;
|
||
return YES;
|
||
}
|
||
else
|
||
{
|
||
return NO;
|
||
}
|
||
}
|
||
|
||
#if USE_GLYPHS
|
||
static void
|
||
_Sane(NSLayoutManager *lm)
|
||
{
|
||
unsigned lastGlyph = 0;
|
||
unsigned lastChar = 0;
|
||
unsigned pos;
|
||
|
||
/*
|
||
* Check gaps.
|
||
*/
|
||
for (pos = 0; pos < GSIArrayCount(_gaps); pos++)
|
||
{
|
||
unsigned val = GSIArrayItemAtIndex(_gaps, pos).ulng;
|
||
|
||
NSCAssert(val > lastGlyph || (val == 0 && pos == 0),
|
||
NSInternalInconsistencyException);
|
||
lastGlyph = val;
|
||
}
|
||
|
||
NSCAssert(GSIArrayCount(_chunks) > 0, NSInternalInconsistencyException);
|
||
lastGlyph = 0;
|
||
for (pos = 0; pos < GSIArrayCount(_chunks); pos++)
|
||
{
|
||
GSGlyphChunk *chunk;
|
||
unsigned count;
|
||
|
||
chunk = (GSGlyphChunk*)GSIArrayItemAtIndex(_chunks, pos).ptr;
|
||
NSCAssert(chunk->glyphIndex == (pos == 0 ? 0 : lastGlyph+1),
|
||
NSInternalInconsistencyException);
|
||
NSCAssert(chunk->charIndex >= lastChar, NSInternalInconsistencyException);
|
||
count = GSIArrayCount(&chunk->glyphs);
|
||
if (count > 0)
|
||
{
|
||
GSIArrayItem a;
|
||
unsigned i;
|
||
|
||
for (i = 0; i < count; i++)
|
||
{
|
||
a = GSIArrayItemAtIndex(&chunk->glyphs, i);
|
||
NSCAssert(chunk->charIndex + gOffset(a) >= lastChar,
|
||
NSInternalInconsistencyException);
|
||
lastChar = chunk->charIndex + gOffset(a);
|
||
}
|
||
lastGlyph = chunk->glyphIndex + count - 1;
|
||
}
|
||
}
|
||
}
|
||
static void
|
||
_GLog(NSLayoutManager *lm, SEL _cmd)
|
||
{
|
||
#if ALL_CHECKS
|
||
unsigned pos;
|
||
|
||
/*
|
||
* Check gaps.
|
||
*/
|
||
fprintf(stderr, "%s, %x\ngaps (%u) - ",
|
||
_cmd ? sel_get_name(_cmd) : "", (unsigned)lm, GSIArrayCount(_gaps));
|
||
for (pos = 0; pos < GSIArrayCount(_gaps); pos++)
|
||
{
|
||
unsigned val = GSIArrayItemAtIndex(_gaps, pos).ulng;
|
||
|
||
fprintf(stderr, " %u", val);
|
||
}
|
||
fprintf(stderr, "\n");
|
||
|
||
fprintf(stderr, "chunks (%u) -\n", GSIArrayCount(_chunks));
|
||
for (pos = 0; pos < GSIArrayCount(_chunks); pos++)
|
||
{
|
||
GSGlyphChunk *chunk;
|
||
unsigned count;
|
||
|
||
chunk = (GSGlyphChunk*)GSIArrayItemAtIndex(_chunks, pos).ptr;
|
||
count = GSIArrayCount(&chunk->glyphs);
|
||
fprintf(stderr, " glyphs (%u) - gi %d, ci %d\n",
|
||
count, chunk->glyphIndex, chunk->charIndex);
|
||
if (count > 0)
|
||
{
|
||
GSIArrayItem a;
|
||
unsigned i;
|
||
|
||
for (i = 0; i < count; i++)
|
||
{
|
||
a = GSIArrayItemAtIndex(&chunk->glyphs, i);
|
||
fprintf(stderr, " %4d %4d %c",
|
||
chunk->glyphIndex + i,
|
||
chunk->charIndex + gOffset(a),
|
||
(char)GSIArrayItemAtIndex(&chunk->glyphs, i).ulng);
|
||
}
|
||
fprintf(stderr, "\n");
|
||
}
|
||
}
|
||
#endif
|
||
}
|
||
#else
|
||
static inline void
|
||
_Sane(NSLayoutManager *lm)
|
||
{
|
||
}
|
||
static inline void
|
||
_GLog(NSLayoutManager *lm, SEL _cmd)
|
||
{
|
||
}
|
||
#endif
|
||
|
||
|
||
|
||
@interface NSLayoutManager (Private)
|
||
|
||
- (void) _doLayout;
|
||
- (int) _rebuildLayoutForTextContainer: (NSTextContainer*)aContainer
|
||
startingAtGlyphIndex: (int)glyphIndex;
|
||
|
||
@end
|
||
|
||
|
||
/**
|
||
* <p>
|
||
* A layout manager handles layout and glyph management for a text
|
||
* storage. A glyph is a symbol draewn to a display, and while
|
||
* there is usually a one to one correspondence between glyphs
|
||
* and characters in the text storage, that is no always the case.</p>
|
||
* <p>
|
||
* Sometimes a group of characters (a unicode composed character sequence)
|
||
* can represent a single glyph, sometimes a single unicode character is
|
||
* represented by multiple glyphs.</p>
|
||
* <p>
|
||
* eg. The text storage may contain the unichar o-umlaut and
|
||
* the glyph stream could contain the two glyphs "o" and umlaut.
|
||
* In this case, we would have two glyphs, with different glyph indexes,
|
||
* both corresponding to a single character index.</p>
|
||
*/
|
||
@implementation NSLayoutManager
|
||
|
||
+ (id) allocWithZone: (NSZone*)z
|
||
{
|
||
// Return a simple layout manager as this is the only working subclass
|
||
if (self == [NSLayoutManager class])
|
||
{
|
||
return [GSSimpleLayoutManager allocWithZone: z];
|
||
}
|
||
else
|
||
{
|
||
return NSAllocateObject (self, 0, z);
|
||
}
|
||
}
|
||
|
||
/** <init />
|
||
* Sets up this instance. We should in future find a glyph generator and a
|
||
* typesetter to use with glyphs management, but for now we just set up
|
||
* the glyph storage.
|
||
*/
|
||
- (id) init
|
||
{
|
||
self = [super init];
|
||
|
||
if (self != nil)
|
||
{
|
||
GSIArray a;
|
||
|
||
_backgroundLayout = YES;
|
||
_delegate = nil;
|
||
_textContainers = [[NSMutableArray alloc] initWithCapacity: 2];
|
||
|
||
/*
|
||
* Initialise glyph storage and ivars to contain 'current' glyph
|
||
* location information.
|
||
*/
|
||
a = NSZoneMalloc(NSDefaultMallocZone(), sizeof(GSIArray_t));
|
||
GSIArrayInitWithZoneAndCapacity(a, NSDefaultMallocZone(), 8);
|
||
_glyphData = a;
|
||
_currentGlyphs = GSCreateGlyphChunk(0, 0);
|
||
GSIArrayInsertItem(glyphChunks, (GSIArrayItem)_currentGlyphs, 0);
|
||
_chunkIndex = 0;
|
||
_glyphOffset = 0;
|
||
|
||
/*
|
||
* Initialise storage of gaps in the glyph stream.
|
||
* Initially there are no gaps in the stream.
|
||
*/
|
||
a = NSZoneMalloc(NSDefaultMallocZone(), sizeof(GSIArray_t));
|
||
GSIArrayInitWithZoneAndCapacity(a, NSDefaultMallocZone(), 8);
|
||
_glyphGaps = a;
|
||
}
|
||
|
||
return self;
|
||
}
|
||
|
||
- (void) dealloc
|
||
{
|
||
unsigned i;
|
||
|
||
/* We check that the _glyphData and _glyphGaps are not NULL so that
|
||
* we can dealloc an object which has not been -init (some
|
||
* regression tests need it).
|
||
*/
|
||
|
||
/*
|
||
* Release all glyph chunk information.
|
||
*/
|
||
if (_glyphData != NULL)
|
||
{
|
||
i = GSIArrayCount(glyphChunks);
|
||
while (i-- > 0)
|
||
{
|
||
GSGlyphChunk *chunk;
|
||
|
||
chunk = (GSGlyphChunk*)(GSIArrayItemAtIndex(glyphChunks, i).ptr);
|
||
GSDestroyGlyphChunk(chunk);
|
||
}
|
||
GSIArrayEmpty(glyphChunks);
|
||
NSZoneFree(NSDefaultMallocZone(), _glyphData);
|
||
}
|
||
|
||
if (_glyphGaps != NULL)
|
||
{
|
||
GSIArrayEmpty((GSIArray)_glyphGaps);
|
||
NSZoneFree(NSDefaultMallocZone(), _glyphGaps);
|
||
}
|
||
|
||
RELEASE (_textContainers);
|
||
|
||
[super dealloc];
|
||
}
|
||
|
||
/**
|
||
* Sets the text storage for the layout manager.
|
||
* Use -replaceTextStorage: instead as a rule. - this method is really
|
||
* more for internal use by the text system.
|
||
* Invalidates the entire layout (should it??)
|
||
*/
|
||
- (void) setTextStorage: (NSTextStorage*)aTextStorage
|
||
{
|
||
unsigned int length;
|
||
NSRange aRange;
|
||
|
||
/*
|
||
* Mark the entire existing text storage as invalid.
|
||
*/
|
||
length = [_textStorage length];
|
||
aRange = NSMakeRange(0, length);
|
||
[self textStorage: _textStorage
|
||
edited: BOTH
|
||
range: aRange
|
||
changeInLength: -length
|
||
invalidatedRange: aRange];
|
||
|
||
/*
|
||
* Make a note of the new text storage object, but don't retain it.
|
||
* The text storage is owning us - it retains us.
|
||
*/
|
||
_textStorage = aTextStorage;
|
||
|
||
length = [aTextStorage length];
|
||
aRange = NSMakeRange (0, length);
|
||
// force complete re - layout
|
||
[self textStorage: aTextStorage
|
||
edited: BOTH
|
||
range: aRange
|
||
changeInLength: length
|
||
invalidatedRange: aRange];
|
||
}
|
||
|
||
/**
|
||
* Returns the text storage for this layout manager.
|
||
*/
|
||
- (NSTextStorage*) textStorage
|
||
{
|
||
return _textStorage;
|
||
}
|
||
|
||
/**
|
||
* Replaces the test storage with a new one.<br />
|
||
* Takes care (since layout managers are owned by text storages)
|
||
* not to get self deallocated.
|
||
*/
|
||
- (void) replaceTextStorage: (NSTextStorage*)newTextStorage
|
||
{
|
||
NSArray *layoutManagers = [_textStorage layoutManagers];
|
||
NSEnumerator *enumerator = [layoutManagers objectEnumerator];
|
||
NSLayoutManager *object;
|
||
|
||
/* Remove layout managers from old NSTextStorage object and add them to the
|
||
new one. NSTextStorage's addLayoutManager invokes NSLayoutManager's
|
||
setTextStorage method automatically, and that includes self. */
|
||
|
||
while ((object = (NSLayoutManager*)[enumerator nextObject]) != nil)
|
||
{
|
||
RETAIN(object);
|
||
[_textStorage removeLayoutManager: object];
|
||
[newTextStorage addLayoutManager: object];
|
||
RELEASE(object);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Return the text containers
|
||
*/
|
||
- (NSArray*) textContainers
|
||
{
|
||
return _textContainers;
|
||
}
|
||
|
||
/**
|
||
* Adds a container to the layout manager.
|
||
*/
|
||
- (void) addTextContainer: (NSTextContainer*)obj
|
||
{
|
||
if ([_textContainers indexOfObjectIdenticalTo: obj] == NSNotFound)
|
||
{
|
||
int i;
|
||
|
||
[_textContainers addObject: obj];
|
||
[obj setLayoutManager: self];
|
||
// FIXME: Invalidate layout beyond previous last container
|
||
_textContainersCount++;
|
||
/* NB: We do not retain this here ! It's already retained in the
|
||
array. */
|
||
_firstTextView = [(NSTextContainer *)[_textContainers objectAtIndex: 0]
|
||
textView];
|
||
for (i = 0; i < _textContainersCount; i++)
|
||
{
|
||
NSTextView *tv = [[_textContainers objectAtIndex: i] textView];
|
||
|
||
[tv _updateMultipleTextViews];
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Inserts a new text container at index.
|
||
*/
|
||
- (void) insertTextContainer: (NSTextContainer*)aTextContainer
|
||
atIndex: (unsigned)index
|
||
{
|
||
int i;
|
||
|
||
[_textContainers insertObject: aTextContainer atIndex: index];
|
||
_textContainersCount++;
|
||
_firstTextView = [(NSTextContainer *)[_textContainers objectAtIndex: 0]
|
||
textView];
|
||
for (i = 0; i < _textContainersCount; i++)
|
||
{
|
||
NSTextView *tv = [[_textContainers objectAtIndex: i] textView];
|
||
|
||
[tv _updateMultipleTextViews];
|
||
}
|
||
// FIXME: Invalidate layout from thsi container onwards
|
||
}
|
||
|
||
/**
|
||
* Removes the text container at index.
|
||
*/
|
||
- (void) removeTextContainerAtIndex: (unsigned)index
|
||
{
|
||
int i;
|
||
|
||
// FIXME invalidate from thsi point onwards.
|
||
[_textContainers removeObjectAtIndex: index];
|
||
_textContainersCount--;
|
||
if (_textContainersCount > 0)
|
||
{
|
||
_firstTextView = [(NSTextContainer *)[_textContainers objectAtIndex: 0]
|
||
textView];
|
||
}
|
||
else
|
||
{
|
||
_firstTextView = nil;
|
||
}
|
||
|
||
for (i = 0; i < _textContainersCount; i++)
|
||
{
|
||
NSTextView *tv = [[_textContainers objectAtIndex: i] textView];
|
||
|
||
[tv _updateMultipleTextViews];
|
||
}
|
||
}
|
||
|
||
/**
|
||
* This determines the glyph range corresponding to aRange and
|
||
* marks the glyphs as invalid. It adjusts the character locations
|
||
* of all glyphs beyond this by lengthChange. It returns the
|
||
* actual character range corresponding to the invalidated glyphs
|
||
* if actualRange is non-nul.
|
||
*/
|
||
- (void) invalidateGlyphsForCharacterRange: (NSRange)aRange
|
||
changeInLength: (int)lengthChange
|
||
actualCharacterRange: (NSRange*)actualRange
|
||
{
|
||
GSIArrayItem item;
|
||
NSRange cRange;
|
||
NSRange gRange;
|
||
unsigned count;
|
||
|
||
_GLog(self,_cmd);
|
||
if (actualRange != 0)
|
||
{
|
||
*actualRange = cRange;
|
||
}
|
||
if (aRange.length == 0)
|
||
{
|
||
return; // Empty ... nothing to do.
|
||
}
|
||
if (aRange.location >= _CharEnd(self))
|
||
{
|
||
return; // No glyphs generated for that character index.
|
||
}
|
||
|
||
gRange = [self glyphRangeForCharacterRange: aRange
|
||
actualCharacterRange: &cRange];
|
||
if (actualRange != 0)
|
||
{
|
||
*actualRange = cRange;
|
||
}
|
||
if (gRange.length == 0)
|
||
{
|
||
return; // Nothing to do.
|
||
}
|
||
|
||
/*
|
||
* Now adjust character locations for glyphs if necessary.
|
||
*/
|
||
_Adjust(self, gRange.location, lengthChange);
|
||
|
||
/*
|
||
* Now adjust invalidated gaps in the glyph stream.
|
||
*/
|
||
count = GSIArrayCount((GSIArray)_glyphGaps);
|
||
if (count == 0)
|
||
{
|
||
gRange(item) = gRange;
|
||
GSIArrayInsertItem((GSIArray)_glyphGaps, item, 0);
|
||
}
|
||
else
|
||
{
|
||
unsigned pos;
|
||
|
||
for (pos = 0; pos < count; pos++)
|
||
{
|
||
NSRange val;
|
||
NSRange tmp;
|
||
|
||
val = gRange(GSIArrayItemAtIndex((GSIArray)_glyphGaps, pos));
|
||
|
||
/*
|
||
* If there is no overlap, we must either insert the new gap
|
||
* before the found one, or continue to look at the next gap.
|
||
*/
|
||
tmp = NSIntersectionRange(gRange, val);
|
||
if (tmp.length == 0)
|
||
{
|
||
if (gRange.location < val.location)
|
||
{
|
||
gRange(item) = gRange;
|
||
GSIArrayInsertItem((GSIArray)_glyphGaps, item, pos);
|
||
break;
|
||
}
|
||
continue;
|
||
}
|
||
|
||
/*
|
||
* If the new gap is entirely within an existing one, we
|
||
* don't need to do anything.
|
||
*/
|
||
if (val.location <= gRange.location
|
||
&& NSMaxRange(val) >= NSMaxRange(gRange))
|
||
{
|
||
break;
|
||
}
|
||
|
||
/*
|
||
* Update the existing gap to be a union with our new gap.
|
||
*/
|
||
gRange = NSUnionRange(gRange, val);
|
||
gRange(item) = gRange;
|
||
GSIArraySetItemAtIndex((GSIArray)_glyphGaps, item, pos);
|
||
|
||
while (pos + 1 < count)
|
||
{
|
||
val = gRange(GSIArrayItemAtIndex((GSIArray)_glyphGaps, pos + 1));
|
||
|
||
/*
|
||
* If there is no overlap with the next gap, we have
|
||
* nothing more to do.
|
||
*/
|
||
tmp = NSIntersectionRange(gRange, val);
|
||
if (tmp.length == 0)
|
||
{
|
||
break;
|
||
}
|
||
|
||
/*
|
||
* If the next gap extends beyond our gap, we can remove
|
||
* the current one and replace the next one with a union.
|
||
*/
|
||
if (val.location <= gRange.location
|
||
&& NSMaxRange(val) >= NSMaxRange(gRange))
|
||
{
|
||
GSIArrayRemoveItemsFromIndex((GSIArray)_glyphGaps, pos);
|
||
count--;
|
||
gRange(item) = NSUnionRange(gRange, val);
|
||
GSIArraySetItemAtIndex((GSIArray)_glyphGaps, item, pos);
|
||
break;
|
||
}
|
||
|
||
/*
|
||
* The next gap is contained within our gap, so we can
|
||
* simply remove it. Then loop to examine the one beyond
|
||
*/
|
||
GSIArrayRemoveItemsFromIndex((GSIArray)_glyphGaps, pos + 1);
|
||
count--;
|
||
}
|
||
}
|
||
}
|
||
|
||
// FIXME - should invalidate the character range ... but what does that mean?
|
||
_GLog(self,_cmd);
|
||
_Sane(self);
|
||
}
|
||
|
||
/**
|
||
* This invalidates glyph positions for all glyphs corresponding
|
||
* to the specified character range.<br />
|
||
* If flag is YES then the layout information needs to be redone from
|
||
* scratch, but if it's NO, the layout manager may try to optimise
|
||
* layout from the old information.<br />
|
||
* If actualRange is non-nul, returns the actual range invalidated.
|
||
*/
|
||
- (void) invalidateLayoutForCharacterRange: (NSRange)aRange
|
||
isSoft: (BOOL)flag
|
||
actualCharacterRange: (NSRange*)actualRange
|
||
{
|
||
[self _doLayout];
|
||
}
|
||
|
||
/**
|
||
* Causes redisplay of aRange, but does not lose the alyout information.
|
||
*/
|
||
- (void) invalidateDisplayForCharacterRange: (NSRange)aRange
|
||
{
|
||
/* FIXME */
|
||
}
|
||
|
||
/**
|
||
* Causes redisplay of aRange, but does not lose the alyout information.
|
||
*/
|
||
- (void) invalidateDisplayForGlyphRange: (NSRange)aRange
|
||
{
|
||
/* FIXME */
|
||
}
|
||
|
||
/**
|
||
* Invalidates the layout of all glyphs in aContainer and all containers
|
||
* following it.
|
||
*/
|
||
- (void) textContainerChangedGeometry: (NSTextContainer*)aContainer
|
||
{
|
||
// find the first character in that text container
|
||
NSRange aRange = [self glyphRangeForTextContainer: aContainer];
|
||
unsigned first = aRange.location;
|
||
|
||
// invalidate the layout from here on
|
||
[self invalidateLayoutForCharacterRange:
|
||
NSMakeRange(first, [_textStorage length] - first)
|
||
isSoft: NO
|
||
actualCharacterRange: NULL];
|
||
}
|
||
|
||
/**
|
||
* Notifies the layout manager that one of its text containers has
|
||
* changed its view and an update of the display is needed.
|
||
*/
|
||
- (void) textContainerChangedTextView: (NSTextContainer*)aContainer
|
||
{
|
||
unsigned index;
|
||
|
||
index = [_textContainers indexOfObjectIdenticalTo: aContainer];
|
||
|
||
if (index != NSNotFound)
|
||
{
|
||
if (index == 0)
|
||
{
|
||
_firstTextView = [aContainer textView];
|
||
|
||
/* It only makes sense to update the other text views if we
|
||
have more than one text container */
|
||
if (_textContainersCount > 1)
|
||
{
|
||
/* It's the first text view. Need to update everything. */
|
||
int i;
|
||
|
||
for (i = 0; i < _textContainersCount; i++)
|
||
{
|
||
NSTextView *tv;
|
||
|
||
tv = [[_textContainers objectAtIndex: i] textView];
|
||
[tv _updateMultipleTextViews];
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* This method is used to handle an editing change to aTextStorage.
|
||
* The mask value indicates whether characters or attribuytes or both
|
||
* have changed.<br />
|
||
* If characters have not changed, the lengthChange argument is ignored.<br/>
|
||
* The newCharRange is the effected range currently in the storage, while
|
||
* invalidatedRange is the original range effected.
|
||
*/
|
||
- (void) textStorage: (NSTextStorage*)aTextStorage
|
||
edited: (unsigned)mask
|
||
range: (NSRange)newCharRange
|
||
changeInLength: (int)lengthChange
|
||
invalidatedRange: (NSRange)invalidatedRange
|
||
{
|
||
/*
|
||
NSLog(@"NSLayoutManager was just notified that a change in the text
|
||
storage occured.");
|
||
NSLog(@"range: (%d, %d) changeInLength: %d invalidatedRange (%d, %d)",
|
||
newCharRange.location, newCharRange.length, lengthChange, invalidatedRange.location,
|
||
invalidatedRange.length);
|
||
*/
|
||
int delta = 0;
|
||
unsigned int last;
|
||
|
||
_GLog(self,_cmd);
|
||
if (mask & NSTextStorageEditedCharacters)
|
||
{
|
||
delta = lengthChange;
|
||
}
|
||
else if (mask == 0)
|
||
{
|
||
return; // No changes to make.
|
||
}
|
||
last = NSMaxRange (invalidatedRange);
|
||
|
||
// hard invalidation occures here.
|
||
[self invalidateGlyphsForCharacterRange: newCharRange
|
||
changeInLength: delta
|
||
actualCharacterRange: NULL];
|
||
[self invalidateLayoutForCharacterRange: invalidatedRange
|
||
isSoft: NO
|
||
actualCharacterRange: NULL];
|
||
|
||
// the following range is soft invalidated
|
||
newCharRange = NSMakeRange (last, [_textStorage length] - last);
|
||
[self invalidateLayoutForCharacterRange: newCharRange
|
||
isSoft: YES
|
||
actualCharacterRange: NULL];
|
||
_GLog(self,_cmd);
|
||
}
|
||
|
||
/**
|
||
* Sets flag to say if text should get laid out in
|
||
* the background when the run lopp is idle.
|
||
*/
|
||
- (void) setBackgroundLayoutEnabled: (BOOL)flag
|
||
{
|
||
_backgroundLayout = flag;
|
||
}
|
||
|
||
/**
|
||
* Returns flag to say if text should get laid out in
|
||
* the background when the run lopp is idle.
|
||
*/
|
||
- (BOOL) backgroundLayoutEnabled
|
||
{
|
||
return _backgroundLayout;
|
||
}
|
||
|
||
/**
|
||
* Used by the internal glyph generation system to insert aGlyph into
|
||
* the glyph stream athe the specified glyphIndex and charIndex.<br />
|
||
* Invariants ...<br />
|
||
* a) Glyph chunks are ordered sequentially from zero by character index.<br />
|
||
* b) Glyph chunks are ordered sequentially from zero by glyph index.<br />
|
||
* c) Adjacent glyphs may share a character index.<br />
|
||
*/
|
||
- (void) insertGlyph: (NSGlyph)aGlyph
|
||
atGlyphIndex: (unsigned)glyphIndex
|
||
characterIndex: (unsigned)charIndex
|
||
{
|
||
unsigned chunkCount = GSIArrayCount(glyphChunks);
|
||
GSIArrayItem info = { 0 };
|
||
GSGlyphChunk *chunk;
|
||
unsigned pos;
|
||
|
||
_GLog(self,_cmd);
|
||
if (glyphIndex == 0 && chunkCount == 0)
|
||
{
|
||
/*
|
||
* Special case - if there are no chunks, this is the
|
||
* very first glyph and can simply be added to a new chunk.
|
||
*/
|
||
chunk = GSCreateGlyphChunk(glyphIndex, charIndex);
|
||
gGlyph(info) = aGlyph;
|
||
GSIArrayAddItem(&chunk->glyphs, info);
|
||
GSIArrayAddItem(glyphChunks, (GSIArrayItem)(void*)chunk);
|
||
}
|
||
else
|
||
{
|
||
unsigned gCount;
|
||
unsigned gOffset;
|
||
unsigned chunkIndex;
|
||
|
||
/*
|
||
* Locate the chunk that we should insert into - the last one with
|
||
* a glyphIndex less than or equal to the index we were given.
|
||
*/
|
||
chunkIndex = GSChunkForGlyphIndex(glyphChunks, glyphIndex);
|
||
chunk = (GSGlyphChunk*)GSIArrayItemAtIndex(glyphChunks, chunkIndex).ptr;
|
||
|
||
/*
|
||
* Check for the case where we have been given an index that's
|
||
* beyond the end of the last chunk.
|
||
*/
|
||
gCount = GSIArrayCount(&chunk->glyphs);
|
||
gOffset = glyphIndex - chunk->glyphIndex;
|
||
if (gOffset > gCount)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"insertGlyph:glyphIndex:characterIndex: "
|
||
@"glyph index out of range"];
|
||
}
|
||
|
||
if (gOffset == 0) // Before first glyph in chunk
|
||
{
|
||
if (chunk->charIndex < charIndex)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"insertGlyph:glyphIndex:characterIndex: "
|
||
@"character index greater than that of next glyph"];
|
||
}
|
||
if (chunkIndex > 0)
|
||
{
|
||
GSGlyphChunk *previous;
|
||
unsigned c;
|
||
|
||
previous = (GSGlyphChunk*)GSIArrayItemAtIndex(glyphChunks,
|
||
chunkIndex-1).ptr;
|
||
c = GSIArrayCount(&previous->glyphs);
|
||
c = previous->charIndex
|
||
+ gOffset(GSIArrayItemAtIndex(&previous->glyphs, c));
|
||
if (c > charIndex)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"insertGlyph:glyphIndex:characterIndex: "
|
||
@"character index less than that of previous glyph"];
|
||
}
|
||
else if (c == charIndex)
|
||
{
|
||
/*
|
||
* Inserting with the same character index as the last glyph
|
||
* in the previous chunk - so we should append to that chunk
|
||
* rather than prepending to this one.
|
||
*/
|
||
chunkIndex--;
|
||
chunk = previous;
|
||
gCount = GSIArrayCount(&chunk->glyphs);
|
||
gOffset = glyphIndex - chunk->glyphIndex;
|
||
}
|
||
}
|
||
}
|
||
else if (gOffset == gCount) // After last glyph in chunk
|
||
{
|
||
unsigned c = chunk->charIndex;
|
||
|
||
if (gOffset > 0)
|
||
{
|
||
c += gOffset(GSIArrayItemAtIndex(&chunk->glyphs, gOffset-1));
|
||
}
|
||
if (charIndex < c)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"insertGlyph:glyphIndex:characterIndex: "
|
||
@"character index less than that of previous glyph"];
|
||
}
|
||
if (chunkIndex < chunkCount - 1)
|
||
{
|
||
GSGlyphChunk *next;
|
||
|
||
next = (GSGlyphChunk*)GSIArrayItemAtIndex(glyphChunks,
|
||
chunkIndex+1).ptr;
|
||
if (next->charIndex < charIndex)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"insertGlyph:glyphIndex:characterIndex: "
|
||
@"character index greater than that of next glyph"];
|
||
}
|
||
else if (next->charIndex == charIndex)
|
||
{
|
||
/*
|
||
* Inserting with the same character index as the first glyph
|
||
* in the next chunk - so we should insert in that chunk
|
||
* rather than appending to this one.
|
||
*/
|
||
chunkIndex++;
|
||
chunk = next;
|
||
gCount = GSIArrayCount(&chunk->glyphs);
|
||
gOffset = glyphIndex - chunk->glyphIndex;
|
||
}
|
||
}
|
||
}
|
||
else // In middle of chunk somewhere.
|
||
{
|
||
unsigned n;
|
||
unsigned p;
|
||
|
||
p = chunk->charIndex
|
||
+ gOffset(GSIArrayItemAtIndex(&chunk->glyphs, gOffset-1));
|
||
if (p > charIndex)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"insertGlyph:glyphIndex:characterIndex: "
|
||
@"character index less than that of previous glyph"];
|
||
}
|
||
n = chunk->charIndex
|
||
+ gOffset(GSIArrayItemAtIndex(&chunk->glyphs, gOffset));
|
||
if (n < charIndex)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"insertGlyph:glyphIndex:characterIndex: "
|
||
@"character index greater than that of next glyph"];
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Shall we add to the chunk or is it big enough already?
|
||
*/
|
||
if (gCount > 4 && gCount == GSIArrayCapacity(&chunk->glyphs))
|
||
{
|
||
GSGlyphChunk *newChunk = 0;
|
||
unsigned from;
|
||
unsigned pos;
|
||
unsigned splitAt = gCount/2;
|
||
unsigned splitChar;
|
||
|
||
splitChar = gOffset(GSIArrayItemAtIndex(&chunk->glyphs, splitAt));
|
||
while (splitAt > 0 && splitChar
|
||
== gOffset(GSIArrayItemAtIndex(&chunk->glyphs, splitAt-1)))
|
||
{
|
||
splitAt--;
|
||
}
|
||
/*
|
||
* Arbitrary check that we could make a sane splitup of the
|
||
* chunk. Conceivably we could have every glyph in the
|
||
* chunk set to the same character - which would force us to
|
||
* break our invariant that all glyphs for a particular
|
||
* character lie in the same chunk.
|
||
*/
|
||
if (splitAt <= gCount/4)
|
||
{
|
||
[NSException raise: NSInternalInconsistencyException
|
||
format: @"unable to split glyph chunk"];
|
||
}
|
||
/*
|
||
* Ok - split the chunk into two (roughly) equal parts.
|
||
*/
|
||
splitChar
|
||
= gOffset(GSIArrayItemAtIndex(&chunk->glyphs, splitAt));
|
||
newChunk = GSCreateGlyphChunk(chunk->glyphIndex + splitAt,
|
||
chunk->charIndex + splitChar);
|
||
GSIArrayInsertItem(glyphChunks, (GSIArrayItem)(void*)newChunk,
|
||
chunkIndex+1);
|
||
pos = 0;
|
||
from = splitAt;
|
||
while (from < GSIArrayCount(&chunk->glyphs))
|
||
{
|
||
GSIArrayItem info;
|
||
|
||
/*
|
||
* Remove attributes from old chunk and add to new.
|
||
* Adjust offset for character index of new chunk.
|
||
*/
|
||
info = GSIArrayItemAtIndex(&chunk->glyphs, from);
|
||
gOffset(info) -= splitChar;
|
||
GSIArrayInsertItem(&newChunk->glyphs, info, pos);
|
||
|
||
from++;
|
||
pos++;
|
||
}
|
||
GSIArrayRemoveItemsFromIndex(&chunk->glyphs, splitAt);
|
||
/*
|
||
* And set up so we point at the correct half of the split chunk.
|
||
*/
|
||
if (glyphIndex >= newChunk->glyphIndex)
|
||
{
|
||
chunkIndex++;
|
||
chunk = newChunk;
|
||
gOffset = glyphIndex - chunk->glyphIndex;
|
||
}
|
||
gCount = GSIArrayCount(&chunk->glyphs);
|
||
}
|
||
|
||
/*
|
||
* Special handling for insertion at the start of a chunk - we
|
||
* need to update the index values for the chunk, and (possibly)
|
||
* the character offsets of every glyph in the chunk.
|
||
*/
|
||
if (gOffset == 0)
|
||
{
|
||
chunk->glyphIndex = glyphIndex;
|
||
if (chunk->charIndex != charIndex)
|
||
{
|
||
int diff = charIndex - chunk->charIndex;
|
||
|
||
/*
|
||
* Changing character index of entire chunk.
|
||
*/
|
||
for (pos = 0; pos < gCount; pos++)
|
||
{
|
||
gOffset(GSIArrayItems(&chunk->glyphs)[pos]) += diff;
|
||
}
|
||
chunk->charIndex = charIndex;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* At last we insert the glyph and its attributes into the chunk.
|
||
*/
|
||
gOffset(info) = charIndex - chunk->charIndex;
|
||
gGlyph(info) = aGlyph;
|
||
GSIArrayInsertItem(&chunk->glyphs, info, gOffset);
|
||
|
||
/*
|
||
* Now adjust the glyph index for all following chunks so we will
|
||
* still know the index of the first glyph in each chunk.
|
||
*/
|
||
for (pos = chunkIndex+1; pos < chunkCount; pos++)
|
||
{
|
||
chunk = (GSGlyphChunk*)GSIArrayItemAtIndex(glyphChunks, pos).ptr;
|
||
chunk->glyphIndex++;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Now adjust gaps to handle glyph insertion.
|
||
*/
|
||
pos = 0;
|
||
while (pos < GSIArrayCount((GSIArray)_glyphGaps))
|
||
{
|
||
unsigned long val;
|
||
|
||
val = GSIArrayItemAtIndex((GSIArray)_glyphGaps, pos).ulng;
|
||
if (val >= glyphIndex)
|
||
{
|
||
GSIArraySetItemAtIndex((GSIArray)_glyphGaps, (GSIArrayItem)(val+1),
|
||
pos);
|
||
}
|
||
pos++;
|
||
}
|
||
_GLog(self,_cmd);
|
||
_Sane(self);
|
||
}
|
||
|
||
/**
|
||
* Returns the glyph at the specified index.<br />
|
||
* Causes any gaps (areas where glyphs have been invalidated) before this
|
||
* index to be re-filled.<br />
|
||
* Raises an exception if the index is out of range.
|
||
*/
|
||
- (NSGlyph) glyphAtIndex: (unsigned)index
|
||
{
|
||
BOOL flag;
|
||
NSGlyph glyph;
|
||
|
||
glyph = [self glyphAtIndex: index isValidIndex: &flag];
|
||
if (flag == NO)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"glyph index out of range"];
|
||
}
|
||
return glyph;
|
||
}
|
||
|
||
/**
|
||
* Returns the glyph at the specified index.<br />
|
||
* Causes any gaps (areas where glyphs have been invalidated) before this
|
||
* index to be re-filled.<br />
|
||
* Sets the flag to indicate whether the index was found ... if it wasn't
|
||
* the returned glyph is meaningless.
|
||
*/
|
||
- (NSGlyph) glyphAtIndex: (unsigned)index
|
||
isValidIndex: (BOOL*)flag
|
||
{
|
||
#if USE_GLYPHS
|
||
NSGlyph glyph;
|
||
NSString *string = nil;
|
||
unsigned textLength = [_textStorage length];
|
||
|
||
_GLog(self,_cmd);
|
||
if (GSIArrayCount((GSIArray)_glyphGaps) > 0
|
||
&& (GSIArrayItemAtIndex((GSIArray)_glyphGaps, 0).ulng) <= index)
|
||
{
|
||
unsigned long gap;
|
||
|
||
string = [_textStorage string];
|
||
|
||
while (GSIArrayCount((GSIArray)_glyphGaps) > 0
|
||
&& (gap = GSIArrayItemAtIndex((GSIArray)_glyphGaps, 0).ulng) <= index)
|
||
{
|
||
unsigned endChar;
|
||
unsigned startChar;
|
||
|
||
if (gap == 0)
|
||
{
|
||
startChar = 0;
|
||
}
|
||
else
|
||
{
|
||
/*
|
||
* Locate the glyph that preceeds the gap, and start with the
|
||
* a character one beyond the one that generated that glyph.
|
||
* This guarantees that we won't try to re-generate the
|
||
* preceeding glyph.
|
||
* FIXME ... probably too simplistic an algorithm if we have
|
||
* decomposed unicode characters to deal with 0 we should
|
||
* probably skip forward to the next character sequence.
|
||
*/
|
||
_JumpToGlyph(self, gap - 1);
|
||
startChar = _CharIndex(self) + 1;
|
||
}
|
||
if (gap == _GlyphEnd(self))
|
||
{
|
||
endChar = textLength;
|
||
}
|
||
else
|
||
{
|
||
_JumpToGlyph(self, gap);
|
||
endChar = _CharIndex(self);
|
||
}
|
||
|
||
/*
|
||
* FIXME
|
||
* Here we put some simple-minded code to generate glyphs from
|
||
* characters assuming that a glyph is the same as a character.
|
||
*/
|
||
while (startChar < endChar)
|
||
{
|
||
unichar c = [string characterAtIndex: startChar];
|
||
|
||
[self insertGlyph: (NSGlyph)c
|
||
atGlyphIndex: gap++
|
||
characterIndex: startChar++];
|
||
}
|
||
/*
|
||
* We have generated glyphs upto or beyond the gap, so we
|
||
* can remove this gap and any others we have gone past.
|
||
*/
|
||
while (GSIArrayCount((GSIArray)_glyphGaps) > 0
|
||
&& GSIArrayItemAtIndex((GSIArray)_glyphGaps, 0).ulng < gap)
|
||
{
|
||
GSIArrayRemoveItemAtIndex((GSIArray)_glyphGaps, 0);
|
||
}
|
||
}
|
||
}
|
||
|
||
if (index >= _GlyphEnd(self) && _CharEnd(self) < textLength)
|
||
{
|
||
unsigned endChar = textLength;
|
||
unsigned startChar = _CharEnd(self);
|
||
unsigned glyphIndex = _GlyphEnd(self);
|
||
|
||
if (string == nil)
|
||
{
|
||
string = [_textStorage string];
|
||
}
|
||
/* FIXME ... should generate glyphs properly here */
|
||
while (startChar < endChar && glyphIndex <= index)
|
||
{
|
||
unichar c = [string characterAtIndex: startChar];
|
||
|
||
[self insertGlyph: (NSGlyph)c
|
||
atGlyphIndex: glyphIndex++
|
||
characterIndex: startChar++];
|
||
}
|
||
}
|
||
|
||
_GLog(self,_cmd);
|
||
_Sane(self);
|
||
if (_JumpToGlyph(self, index) == YES)
|
||
{
|
||
*flag = YES;
|
||
glyph = gGlyph(*_Info(self));
|
||
}
|
||
else
|
||
{
|
||
*flag = NO;
|
||
glyph = NSNullGlyph;
|
||
}
|
||
#if ALL_CHECKS
|
||
if (index >= [_textStorage length])
|
||
{
|
||
if (glyph != NSNullGlyph)
|
||
{
|
||
missmatch(_cmd);
|
||
*flag = NO;
|
||
glyph = NSNullGlyph;
|
||
}
|
||
}
|
||
else if (glyph != (NSGlyph)[[_textStorage string] characterAtIndex: index])
|
||
{
|
||
missmatch(_cmd);
|
||
*flag = YES;
|
||
glyph = (NSGlyph)[[_textStorage string] characterAtIndex: index];
|
||
}
|
||
#endif
|
||
return glyph;
|
||
#else
|
||
return (NSGlyph)[[_textStorage string] characterAtIndex: index];
|
||
#endif
|
||
}
|
||
|
||
/**
|
||
* Replaces the glyph at index with newGlyph without changing
|
||
* character index or other attributes.
|
||
*/
|
||
- (void) replaceGlyphAtIndex: (unsigned)index
|
||
withGlyph: (NSGlyph)newGlyph
|
||
{
|
||
_GLog(self,_cmd);
|
||
if (_JumpToGlyph(self, index) == NO)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"glyph index out of range"];
|
||
}
|
||
gGlyph(*_Info(self)) = newGlyph;
|
||
_GLog(self,_cmd);
|
||
}
|
||
|
||
/**
|
||
* This returns a nul terminated array of glyphs ... so glyphArray
|
||
* should contain space for glyphRange.length+1 glyphs.
|
||
*/
|
||
- (unsigned) getGlyphs: (NSGlyph*)glyphArray
|
||
range: (NSRange)glyphRange
|
||
{
|
||
unsigned packed = 0;
|
||
unsigned toFetch = glyphRange.length;
|
||
|
||
_GLog(self,_cmd);
|
||
if (toFetch > 0)
|
||
{
|
||
/*
|
||
* Force generation of glyphs to fill range.
|
||
*/
|
||
[self glyphAtIndex: NSMaxRange(glyphRange)-1];
|
||
|
||
_JumpToGlyph(self, glyphRange.location);
|
||
|
||
/*
|
||
* Now return glyphs, excluding those 'not shown'
|
||
*/
|
||
while (toFetch-- > 0)
|
||
{
|
||
GSIArrayItem info = *_Info(self);
|
||
|
||
if (gIsNotShown(info) == 0)
|
||
{
|
||
glyphArray[packed++] = gGlyph(info);
|
||
}
|
||
_Step(self); // Move to next glyph.
|
||
}
|
||
}
|
||
glyphArray[packed] = 0;
|
||
_GLog(self,_cmd);
|
||
return packed;
|
||
}
|
||
|
||
/**
|
||
* Removes all the glyphs in aRange from the glyph stream, causing all
|
||
* subsequent glyphs to have their index decreased by aRange.length
|
||
*/
|
||
- (void) deleteGlyphsInRange: (NSRange)aRange
|
||
{
|
||
unsigned chunkStart;
|
||
unsigned chunkEnd;
|
||
unsigned offset;
|
||
unsigned from;
|
||
unsigned pos;
|
||
GSGlyphChunk *chunk;
|
||
|
||
_GLog(self,_cmd);
|
||
if (aRange.length == 0)
|
||
{
|
||
return; // Nothing to delete.
|
||
}
|
||
pos = GSIArrayCount(glyphChunks) - 1;
|
||
chunk = (GSGlyphChunk*)GSIArrayItemAtIndex(glyphChunks, pos).ptr;
|
||
pos = chunk->glyphIndex + GSIArrayCount(&chunk->glyphs);
|
||
if (aRange.location >= pos)
|
||
{
|
||
return; // Range is beyond glyphs.
|
||
}
|
||
if (NSMaxRange(aRange) > pos)
|
||
{
|
||
aRange.length = pos - aRange.location; // Truncate range to glyphs.
|
||
}
|
||
|
||
chunkStart = GSChunkForGlyphIndex(glyphChunks, aRange.location);
|
||
chunkEnd = GSChunkForGlyphIndex(glyphChunks, NSMaxRange(aRange)-1);
|
||
|
||
/*
|
||
* Remove all chunks wholy contained in the range.
|
||
*/
|
||
while (chunkEnd - chunkStart > 1)
|
||
{
|
||
chunkEnd--;
|
||
chunk = (GSGlyphChunk*)GSIArrayItemAtIndex(glyphChunks, chunkEnd).ptr;
|
||
GSIArrayRemoveItemAtIndex(glyphChunks, chunkEnd);
|
||
GSDestroyGlyphChunk(chunk);
|
||
}
|
||
|
||
/*
|
||
* Get start chunk and remove any glyphs in specified range.
|
||
*/
|
||
chunk = (GSGlyphChunk*)GSIArrayItemAtIndex(glyphChunks, chunkStart).ptr;
|
||
if (chunkStart == chunkEnd)
|
||
{
|
||
pos = chunk->glyphIndex;
|
||
}
|
||
else
|
||
{
|
||
offset = aRange.location - chunk->glyphIndex;
|
||
if (offset == 0)
|
||
{
|
||
/*
|
||
* Start chunk is fully enclosed in range - remove it.
|
||
*/
|
||
pos = chunk->glyphIndex;
|
||
GSIArrayRemoveItemAtIndex(glyphChunks, chunkStart);
|
||
GSDestroyGlyphChunk(chunk);
|
||
chunkEnd--;
|
||
}
|
||
else
|
||
{
|
||
pos = chunk->glyphIndex + offset;
|
||
GSIArrayRemoveItemsFromIndex(&chunk->glyphs, offset);
|
||
}
|
||
chunk = (GSGlyphChunk*)GSIArrayItemAtIndex(glyphChunks, chunkEnd).ptr;
|
||
}
|
||
|
||
offset = NSMaxRange(aRange) - chunk->glyphIndex;
|
||
if (chunk->glyphIndex < aRange.location)
|
||
{
|
||
from = aRange.location - chunk->glyphIndex;
|
||
}
|
||
else
|
||
{
|
||
from = 0;
|
||
}
|
||
chunk->glyphIndex = pos;
|
||
while (offset-- > from)
|
||
{
|
||
GSIArrayRemoveItemAtIndex(&chunk->glyphs, from);
|
||
}
|
||
while (++chunkEnd < GSIArrayCount(glyphChunks))
|
||
{
|
||
chunk = (GSGlyphChunk*)GSIArrayItemAtIndex(glyphChunks, chunkEnd).ptr;
|
||
chunk->glyphIndex -= aRange.length;
|
||
}
|
||
|
||
/*
|
||
* Remove any gaps that were in the deleted range and adjust the
|
||
* indices of any remaining gaps to allow for the deletion.
|
||
*/
|
||
pos = 0;
|
||
while (pos < GSIArrayCount((GSIArray)_glyphGaps))
|
||
{
|
||
unsigned val = GSIArrayItemAtIndex((GSIArray)_glyphGaps, pos).ulng;
|
||
|
||
if (val < aRange.location)
|
||
{
|
||
pos++; // Not modified by deletion
|
||
}
|
||
else if (val <= NSMaxRange(aRange))
|
||
{
|
||
/*
|
||
* Gap is within (or immediately after) the deleted area ...
|
||
* we set it to the end of the deleted area, or remove it if
|
||
* there is already a gap at that location.
|
||
*/
|
||
if (pos > 0
|
||
&& GSIArrayItemAtIndex((GSIArray)_glyphGaps, pos-1).ulng
|
||
== aRange.location)
|
||
{
|
||
GSIArrayRemoveItemAtIndex((GSIArray)_glyphGaps, pos);
|
||
}
|
||
else
|
||
{
|
||
GSIArraySetItemAtIndex((GSIArray)_glyphGaps,
|
||
(GSIArrayItem)aRange.location, pos);
|
||
pos++;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/*
|
||
* Gap is beyond deleted area ... simply adjust downwards.
|
||
*/
|
||
val -= aRange.length;
|
||
GSIArraySetItemAtIndex((GSIArray)_glyphGaps,
|
||
(GSIArrayItem)val, pos);
|
||
pos++;
|
||
}
|
||
}
|
||
|
||
_GLog(self,_cmd);
|
||
_Sane(self);
|
||
}
|
||
|
||
/**
|
||
* Returns the number of glyphs in the glyph stream ... causing generation
|
||
* of new glyphs to fill gaps and to extend the stream until all characters
|
||
* in the text storage have had glyphs generated.
|
||
*/
|
||
- (unsigned) numberOfGlyphs
|
||
{
|
||
unsigned result;
|
||
#if USE_GLYPHS
|
||
BOOL valid;
|
||
|
||
/*
|
||
* Force generation of all glyphs.
|
||
*/
|
||
[self glyphAtIndex: 0x7fffffff isValidIndex: &valid];
|
||
result = _GlyphEnd(self);
|
||
#if ALL_CHECKS
|
||
if (result != [_textStorage length])
|
||
{
|
||
missmatch(_cmd);
|
||
result = [_textStorage length];
|
||
}
|
||
#endif
|
||
#else
|
||
result = [_textStorage length];
|
||
#endif
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* Sets the glyph at glyphIndex to correspond to the character at charIndex.
|
||
*/
|
||
- (void) setCharacterIndex: (unsigned)charIndex
|
||
forGlyphAtIndex: (unsigned)glyphIndex
|
||
{
|
||
int diff;
|
||
|
||
_GLog(self,_cmd);
|
||
if (_JumpToGlyph(self, glyphIndex) == NO)
|
||
{
|
||
[self glyphAtIndex: glyphIndex];
|
||
_JumpToGlyph(self, glyphIndex);
|
||
}
|
||
diff = charIndex - _CharIndex(self);
|
||
if (diff == 0)
|
||
{
|
||
return; // Already set - nothing to do.
|
||
}
|
||
|
||
if (_Back(self) == NO)
|
||
{
|
||
if (charIndex != 0)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"set non-zero index for initial glyph"];
|
||
}
|
||
return;
|
||
}
|
||
if (_CharIndex(self) > charIndex)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"set index lower than preceeding glyph"];
|
||
}
|
||
_Step(self);
|
||
if (_Step(self) == YES && charIndex > _CharIndex(self))
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"set index higher than following glyph"];
|
||
}
|
||
|
||
_Back(self);
|
||
/*
|
||
* If this is the start of a chunk, we adjust the character position
|
||
* for the chunk as a whole, then fix each glyph in turn. Otherwise
|
||
* we simply adjust the glyph concerned.
|
||
*/
|
||
if (_glyphOffset == 0)
|
||
{
|
||
GSGlyphChunk *chunk = (GSGlyphChunk*)_currentGlyphs;
|
||
|
||
diff = charIndex - _CharIndex(self);
|
||
chunk->charIndex += diff;
|
||
while (_Step(self) == YES && (GSGlyphChunk*)_currentGlyphs == chunk)
|
||
{
|
||
gOffset(*_Info(self)) += diff;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
gOffset(*_Info(self)) += diff;
|
||
}
|
||
_GLog(self,_cmd);
|
||
_Sane(self);
|
||
}
|
||
|
||
/**
|
||
* Returns the character index for the specified glyphIndex.<br />
|
||
* If there are invalidated ranges (gaps) in the glyph stream before
|
||
* glyphIndex, this will cause glyph generation to fill them.
|
||
*/
|
||
- (unsigned) characterIndexForGlyphAtIndex: (unsigned)glyphIndex
|
||
{
|
||
unsigned result;
|
||
|
||
#if USE_GLYPHS
|
||
_GLog(self,_cmd);
|
||
if (_JumpToGlyph(self, glyphIndex) == NO)
|
||
{
|
||
BOOL exists;
|
||
|
||
[self glyphAtIndex: glyphIndex isValidIndex: &exists];
|
||
if (exists == YES)
|
||
{
|
||
_JumpToGlyph(self, glyphIndex);
|
||
result = _CharIndex(self);
|
||
}
|
||
else
|
||
{
|
||
/*
|
||
* As a special case, the glyph index just beyond the end of
|
||
* the glyph stream is known to map to the character index just
|
||
* beyond the end of the text.
|
||
*/
|
||
if (glyphIndex == _GlyphEnd(self))
|
||
{
|
||
result = [_textStorage length];
|
||
}
|
||
else
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"glyph index out of range"];
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
result = _CharIndex(self);
|
||
}
|
||
#if ALL_CHECKS
|
||
if (result != glyphIndex)
|
||
{
|
||
missmatch(_cmd);
|
||
result = glyphIndex;
|
||
}
|
||
#endif
|
||
_GLog(self,_cmd);
|
||
#else
|
||
result = glyphIndex;
|
||
#endif
|
||
return result;
|
||
}
|
||
|
||
/**
|
||
* Returns the range of characters that generated the glyphs in glyphRange.
|
||
* Sets actualGlyphRange (if non-nul) to the range of glyphs generated by
|
||
* those characters.
|
||
*/
|
||
- (NSRange) characterRangeForGlyphRange: (NSRange)glyphRange
|
||
actualGlyphRange: (NSRange*)actualGlyphRange
|
||
{
|
||
NSRange cRange;
|
||
NSRange gRange = glyphRange;
|
||
#if USE_GLYPHS
|
||
unsigned cEnd;
|
||
BOOL exists;
|
||
|
||
_GLog(self,_cmd);
|
||
/*
|
||
* Force generation of glyphs to fill gaps.
|
||
*/
|
||
[self glyphAtIndex: NSMaxRange(glyphRange)
|
||
isValidIndex: &exists];
|
||
|
||
/*
|
||
* Locate character index of location immediately beyond last glyph in range.
|
||
*/
|
||
if (exists == NO)
|
||
{
|
||
if (NSMaxRange(glyphRange) > _GlyphEnd(self))
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"glyph range too large"];
|
||
}
|
||
cEnd = [_textStorage length];
|
||
}
|
||
else
|
||
{
|
||
_JumpToGlyph(self, NSMaxRange(glyphRange));
|
||
cEnd = _CharIndex(self);
|
||
}
|
||
|
||
/*
|
||
* Locate the first glyph and step backwards to the earliest glyph with
|
||
* the same character index.
|
||
*/
|
||
_JumpToGlyph(self, glyphRange.location);
|
||
cRange.location = _CharIndex(self);
|
||
cRange.length = cEnd - cRange.location;
|
||
while (_Back(self) == YES && _CharIndex(self) == cRange.location)
|
||
{
|
||
gRange.location--;
|
||
gRange.length++;
|
||
}
|
||
|
||
#if ALL_CHECKS
|
||
if (NSEqualRanges(cRange, glyphRange) == NO)
|
||
{
|
||
missmatch(_cmd);
|
||
cRange = glyphRange;
|
||
}
|
||
if (NSEqualRanges(gRange, glyphRange) == NO)
|
||
{
|
||
missmatch(_cmd);
|
||
gRange = glyphRange;
|
||
}
|
||
#endif
|
||
#else
|
||
// Currently gyphIndex is the same as character index
|
||
gRange = glyphRange;
|
||
cRange = glyphRange;
|
||
#endif
|
||
if (actualGlyphRange != 0)
|
||
{
|
||
*actualGlyphRange = gRange;
|
||
}
|
||
return cRange;
|
||
}
|
||
|
||
/**
|
||
* Returns the range of glyphs that are generated from the characters in
|
||
* charRange.
|
||
* Sets actualCharRange (if non-nul) to the full range of characters which
|
||
* generated those glyphs.
|
||
*/
|
||
- (NSRange) glyphRangeForCharacterRange: (NSRange)charRange
|
||
actualCharacterRange: (NSRange*)actualCharRange
|
||
{
|
||
NSRange gRange;
|
||
#if USE_GLYPHS
|
||
unsigned pos;
|
||
NSRange cRange = charRange;
|
||
unsigned numGlyphs;
|
||
BOOL valid;
|
||
|
||
/*
|
||
* If the range we have been given begins or ends with a composed
|
||
* character sequence, we must extend it to encompass the entire
|
||
* sequence. We store the actual range in cRange.
|
||
*/
|
||
if (charRange.length > 0)
|
||
{
|
||
NSString *s = [_textStorage string];
|
||
NSRange r;
|
||
|
||
r = [s rangeOfComposedCharacterSequenceAtIndex: cRange.location];
|
||
if (r.length > 0)
|
||
{
|
||
cRange.length += (cRange.location - r.location);
|
||
cRange.location = r.location;
|
||
}
|
||
if (NSMaxRange(charRange) > NSMaxRange(r))
|
||
{
|
||
pos = NSMaxRange(charRange) - 1;
|
||
r = [s rangeOfComposedCharacterSequenceAtIndex: pos];
|
||
if (r.length > 0)
|
||
{
|
||
cRange.length += r.length - 1;
|
||
}
|
||
}
|
||
}
|
||
|
||
_GLog(self,_cmd);
|
||
// Force generation of glyphs.
|
||
[self glyphAtIndex: NSMaxRange(cRange) - 1 isValidIndex: &valid];
|
||
|
||
/*
|
||
* Locate the first glyph corresponding to the start character.
|
||
* If it doesn't exist, we either have a zero length range at the end.
|
||
* or we must return a not found marker.
|
||
*/
|
||
if (_JumpToChar(self, charRange.location) == NO)
|
||
{
|
||
if (charRange.location == _CharEnd(self))
|
||
{
|
||
cRange = NSMakeRange(charRange.location, 0);
|
||
gRange = NSMakeRange(numGlyphs, 0);
|
||
}
|
||
else
|
||
{
|
||
cRange = NSMakeRange(NSNotFound, 0);
|
||
gRange = NSMakeRange(NSNotFound, 0);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
gRange.location = _GlyphIndex(self);
|
||
|
||
/*
|
||
* Adjust start character if necessary. The glyph may have a lower
|
||
* index if the start char is part of a composed character sequence.
|
||
*/
|
||
pos = _CharIndex(self);
|
||
if (pos < cRange.location)
|
||
{
|
||
cRange.length += (cRange.location - pos);
|
||
cRange.location = pos;
|
||
}
|
||
|
||
if (charRange.length == 0)
|
||
{
|
||
/*
|
||
* For a zero length range, we don't need to locate an end character.
|
||
*/
|
||
cRange.length = 0; // May have been lengthened above.
|
||
gRange.length = 0;
|
||
}
|
||
else if (NSMaxRange(charRange) == [_textStorage length])
|
||
{
|
||
/*
|
||
* Special case - range extends to end of text storage.
|
||
*/
|
||
gRange.length = numGlyphs - gRange.location;
|
||
}
|
||
else
|
||
{
|
||
/*
|
||
* Locate the glyph immediately beyond the range,
|
||
* and calculate the length of the range from that.
|
||
*/
|
||
_JumpToChar(self, NSMaxRange(charRange));
|
||
pos = _GlyphIndex(self);
|
||
gRange.length = pos - gRange.location;
|
||
pos = _CharIndex(self);
|
||
cRange.length = pos - cRange.location;
|
||
}
|
||
}
|
||
#if ALL_CHECKS
|
||
if (NSEqualRanges(gRange, charRange) == NO)
|
||
{
|
||
missmatch(_cmd);
|
||
gRange = charRange;
|
||
}
|
||
if (NSEqualRanges(cRange, charRange) == NO)
|
||
{
|
||
missmatch(_cmd);
|
||
cRange = charRange;
|
||
}
|
||
#endif
|
||
if (actualCharRange != 0)
|
||
{
|
||
*actualCharRange = cRange;
|
||
}
|
||
_GLog(self,_cmd);
|
||
#else
|
||
// Currently gyphIndex is the same as character index
|
||
if (actualCharRange != NULL)
|
||
{
|
||
*actualCharRange = charRange;
|
||
}
|
||
gRange = charRange;
|
||
#endif
|
||
return gRange;
|
||
}
|
||
|
||
/**
|
||
* This method modifies the attributes of an existing glyph at glyphIndex.
|
||
* It only deals with the existing attribute types ... if you subclass and
|
||
* add new attributed, you must replace this method with one which can
|
||
* store your new attributes.
|
||
*/
|
||
- (void) setIntAttribute: (int)attribute
|
||
value: (int)anInt
|
||
forGlyphAtIndex: (unsigned)glyphIndex
|
||
{
|
||
GSIArrayItem info;
|
||
|
||
_GLog(self,_cmd);
|
||
if (_JumpToGlyph(self, glyphIndex) == NO)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"glyph index out of range"];
|
||
}
|
||
info = *_Info(self);
|
||
if (attribute == GSGlyphDrawsOutsideLineFragment)
|
||
{
|
||
if (anInt == 0)
|
||
{
|
||
gDrawsOutside(info) = 0;
|
||
}
|
||
else
|
||
{
|
||
gDrawsOutside(info) = 1;
|
||
}
|
||
}
|
||
else if (attribute == GSGlyphIsNotShown)
|
||
{
|
||
if (anInt == 0)
|
||
{
|
||
gIsNotShown(info) = 0;
|
||
}
|
||
else
|
||
{
|
||
gIsNotShown(info) = 1;
|
||
}
|
||
}
|
||
else if (attribute == GSGlyphGeneration)
|
||
{
|
||
gGeneration(info) = anInt;
|
||
}
|
||
else if (attribute == GSGlyphInscription)
|
||
{
|
||
gInscription(info) = anInt;
|
||
}
|
||
*_Info(self) = info;
|
||
_GLog(self,_cmd);
|
||
}
|
||
|
||
/**
|
||
* Returns the value for the attribute at the glyphIndex.
|
||
*/
|
||
- (int) intAttribute: (int)attribute
|
||
forGlyphAtIndex: (unsigned)glyphIndex
|
||
{
|
||
GSIArrayItem info;
|
||
|
||
_GLog(self,_cmd);
|
||
if (_JumpToGlyph(self, glyphIndex) == NO)
|
||
{
|
||
[NSException raise: NSRangeException
|
||
format: @"glyph index out of range"];
|
||
}
|
||
info = *_Info(self);
|
||
|
||
if (attribute == GSGlyphDrawsOutsideLineFragment)
|
||
{
|
||
if (gDrawsOutside(info) == 0)
|
||
{
|
||
return 0;
|
||
}
|
||
else
|
||
{
|
||
return 1;
|
||
}
|
||
}
|
||
else if (attribute == GSGlyphIsNotShown)
|
||
{
|
||
if (gIsNotShown(info) == 0)
|
||
{
|
||
return 0;
|
||
}
|
||
else
|
||
{
|
||
return 1;
|
||
}
|
||
}
|
||
else if (attribute == GSGlyphGeneration)
|
||
{
|
||
return gGeneration(info);
|
||
}
|
||
else if (attribute == GSGlyphInscription)
|
||
{
|
||
return gInscription(info);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
- (void) setTextContainer: (NSTextContainer*)aTextContainer
|
||
forGlyphRange: (NSRange)glyphRange
|
||
{
|
||
/* TODO */
|
||
}
|
||
|
||
- (NSRange) glyphRangeForTextContainer: (NSTextContainer*)aTextContainer
|
||
{
|
||
/* TODO */
|
||
return NSMakeRange(NSNotFound, 0);
|
||
}
|
||
|
||
/**
|
||
* Returns the text container in which the glyph at glyphIndex is laid.
|
||
* If effectiveRange is non-nul, returns the range of all glyphs in the
|
||
* container.
|
||
*/
|
||
- (NSTextContainer*) textContainerForGlyphAtIndex: (unsigned)glyphIndex
|
||
effectiveRange: (NSRange*)effectiveRange
|
||
{
|
||
/* FIXME ... needs to be properly implemented */
|
||
if (effectiveRange != 0)
|
||
{
|
||
*effectiveRange = NSMakeRange(0, [self numberOfGlyphs]);
|
||
}
|
||
if ([_textContainers count] == 0)
|
||
{
|
||
return nil;
|
||
}
|
||
else
|
||
{
|
||
return [_textContainers objectAtIndex: 0];
|
||
}
|
||
}
|
||
|
||
- (void) setLineFragmentRect: (NSRect)fragmentRect
|
||
forGlyphRange: (NSRange)glyphRange
|
||
usedRect: (NSRect)usedRect
|
||
{
|
||
/* TODO */
|
||
}
|
||
|
||
- (NSRect) lineFragmentRectForGlyphAtIndex: (unsigned)glyphIndex
|
||
effectiveRange: (NSRange*)lineFragmentRange
|
||
{
|
||
/* TODO */
|
||
return NSZeroRect;
|
||
}
|
||
|
||
- (NSRect) lineFragmentUsedRectForGlyphAtIndex: (unsigned)glyphIndex
|
||
effectiveRange: (NSRange*)lineFragmentRange
|
||
{
|
||
/* TODO */
|
||
return NSZeroRect;
|
||
}
|
||
|
||
- (void) setExtraLineFragmentRect: (NSRect)aRect
|
||
usedRect: (NSRect)usedRect
|
||
textContainer: (NSTextContainer*)aTextContainer
|
||
{
|
||
_extraLineFragmentRect = aRect;
|
||
_extraLineFragmentUsedRect = usedRect;
|
||
_extraLineFragmentContainer = aTextContainer;
|
||
}
|
||
|
||
- (NSRect) extraLineFragmentRect
|
||
{
|
||
return _extraLineFragmentRect;
|
||
}
|
||
|
||
- (NSRect) extraLineFragmentUsedRect
|
||
{
|
||
return _extraLineFragmentUsedRect;
|
||
}
|
||
|
||
- (NSTextContainer*) extraLineFragmentTextContainer
|
||
{
|
||
return _extraLineFragmentContainer;
|
||
}
|
||
|
||
- (NSRect)usedRectForTextContainer:(NSTextContainer *)container
|
||
{
|
||
/* TODO */
|
||
return NSZeroRect;
|
||
}
|
||
|
||
- (void)setAttachmentSize:(NSSize)attachmentSize
|
||
forGlyphRange:(NSRange)glyphRange
|
||
{
|
||
/* TODO */
|
||
}
|
||
|
||
- (void) setDrawsOutsideLineFragment: (BOOL)flag
|
||
forGlyphAtIndex: (unsigned)glyphIndex
|
||
{
|
||
[self setIntAttribute: GSGlyphDrawsOutsideLineFragment
|
||
value: 1
|
||
forGlyphAtIndex: glyphIndex];
|
||
}
|
||
|
||
- (BOOL) drawsOutsideLineFragmentForGlyphAtIndex: (unsigned)glyphIndex
|
||
{
|
||
if ([self intAttribute: GSGlyphDrawsOutsideLineFragment
|
||
forGlyphAtIndex: glyphIndex] == 1)
|
||
{
|
||
return YES;
|
||
}
|
||
return NO;
|
||
}
|
||
|
||
- (void) setLocation: (NSPoint)aPoint
|
||
forStartOfGlyphRange: (NSRange)glyphRange
|
||
{
|
||
/* TODO */
|
||
}
|
||
|
||
- (NSPoint) locationForGlyphAtIndex: (unsigned)glyphIndex
|
||
{
|
||
/* TODO */
|
||
return NSZeroPoint;
|
||
}
|
||
|
||
- (NSRange) rangeOfNominallySpacedGlyphsContainingIndex: (unsigned)glyphIndex
|
||
{
|
||
/* TODO */
|
||
return NSMakeRange(NSNotFound, 0);
|
||
}
|
||
|
||
- (NSRect*) rectArrayForCharacterRange: (NSRange)charRange
|
||
withinSelectedCharacterRange: (NSRange)selChareRange
|
||
inTextContainer: (NSTextContainer*)aTextContainer
|
||
rectCount: (unsigned*)rectCount
|
||
{
|
||
/* TODO */
|
||
return NULL;
|
||
}
|
||
|
||
- (NSRect*) rectArrayForGlyphRange: (NSRange)glyphRange
|
||
withinSelectedGlyphRange: (NSRange)selectedGlyphRange
|
||
inTextContainer: (NSTextContainer*)aTextContainer
|
||
rectCount: (unsigned*)rectCount
|
||
{
|
||
/* TODO */
|
||
return _cachedRectArray;
|
||
}
|
||
|
||
- (NSRect) boundingRectForGlyphRange: (NSRange)glyphRange
|
||
inTextContainer: (NSTextContainer*)aTextContainer
|
||
{
|
||
/* TODO */
|
||
return NSZeroRect;
|
||
}
|
||
|
||
- (NSRange) glyphRangeForBoundingRect: (NSRect)aRect
|
||
inTextContainer: (NSTextContainer*)aTextContainer
|
||
{
|
||
/* TODO */
|
||
return NSMakeRange(0, 0);
|
||
}
|
||
|
||
- (NSRange) glyphRangeForBoundingRectWithoutAdditionalLayout: (NSRect)bounds
|
||
inTextContainer: (NSTextContainer*)aTextContainer
|
||
{
|
||
/* TODO */
|
||
return NSMakeRange(0, 0);
|
||
}
|
||
|
||
- (unsigned) glyphIndexForPoint: (NSPoint)aPoint
|
||
inTextContainer: (NSTextContainer*)aTextContainer
|
||
fractionOfDistanceThroughGlyph: (float*)partialFraction
|
||
{
|
||
/* TODO */
|
||
return 0;
|
||
}
|
||
|
||
- (unsigned) glyphIndexForPoint: (NSPoint)aPoint
|
||
inTextContainer: (NSTextContainer *)aTextContainer
|
||
{
|
||
/* TODO */
|
||
return [self glyphIndexForPoint: aPoint
|
||
inTextContainer: aTextContainer
|
||
fractionOfDistanceThroughGlyph: NULL];
|
||
}
|
||
|
||
- (void) setNotShownAttribute: (BOOL)flag
|
||
forGlyphAtIndex: (unsigned)glyphIndex
|
||
{
|
||
[self setIntAttribute: GSGlyphIsNotShown
|
||
value: 1
|
||
forGlyphAtIndex: glyphIndex];
|
||
}
|
||
|
||
- (BOOL) notShownAttributeForGlyphAtIndex: (unsigned)glyphIndex
|
||
{
|
||
if ([self intAttribute: GSGlyphIsNotShown forGlyphAtIndex: glyphIndex] == 1)
|
||
{
|
||
return YES;
|
||
}
|
||
return NO;
|
||
}
|
||
|
||
- (void) setShowsInvisibleCharacters: (BOOL)flag
|
||
{
|
||
_showsInvisibleChars = flag;
|
||
}
|
||
|
||
- (BOOL) showsInvisibleCharacters
|
||
{
|
||
return _showsInvisibleChars;
|
||
}
|
||
|
||
- (void) setShowsControlCharacters: (BOOL)flag
|
||
{
|
||
_showsControlChars = flag;
|
||
}
|
||
|
||
- (BOOL) showsControlCharacters
|
||
{
|
||
return _showsControlChars;
|
||
}
|
||
|
||
- (void) setHyphenationFactor: (float)factor
|
||
{
|
||
_hyphenationFactor = factor;
|
||
}
|
||
|
||
- (float) hyphenationFactor
|
||
{
|
||
return _hyphenationFactor;
|
||
}
|
||
|
||
- (void) getFirstUnlaidCharacterIndex: (unsigned*)charIndex
|
||
glyphIndex: (unsigned*)glyphIndex
|
||
{
|
||
if (charIndex)
|
||
{
|
||
*charIndex = [self firstUnlaidCharacterIndex];
|
||
}
|
||
|
||
if (glyphIndex)
|
||
{
|
||
*glyphIndex = [self firstUnlaidGlyphIndex];
|
||
}
|
||
}
|
||
|
||
- (unsigned int) firstUnlaidCharacterIndex
|
||
{
|
||
return _firstUnlaidCharIndex;
|
||
}
|
||
|
||
- (unsigned int) firstUnlaidGlyphIndex
|
||
{
|
||
return _firstUnlaidGlyphIndex;
|
||
}
|
||
|
||
- (void) setUsesScreenFonts: (BOOL)flag
|
||
{
|
||
_usesScreenFonts = flag;
|
||
}
|
||
|
||
- (BOOL) usesScreenFonts
|
||
{
|
||
return _usesScreenFonts;
|
||
}
|
||
|
||
- (NSFont*) substituteFontForFont: (NSFont*)originalFont
|
||
{
|
||
NSFont *replaceFont;
|
||
|
||
if (! _usesScreenFonts)
|
||
{
|
||
return originalFont;
|
||
}
|
||
|
||
// FIXME: Should check if any NSTextView is scaled or rotated
|
||
replaceFont = [originalFont screenFont];
|
||
|
||
if (replaceFont != nil)
|
||
{
|
||
return replaceFont;
|
||
}
|
||
else
|
||
{
|
||
return originalFont;
|
||
}
|
||
}
|
||
|
||
- (NSView*) rulerAccessoryViewForTextView: (NSTextView*)aTextView
|
||
paragraphStyle: (NSParagraphStyle*)paragraphStyle
|
||
ruler: (NSRulerView*)aRulerView
|
||
enabled: (BOOL)flag
|
||
{
|
||
/* TODO */
|
||
return NULL;
|
||
}
|
||
|
||
- (NSArray*) rulerMarkersForTextView: (NSTextView*)aTextView
|
||
paragraphStyle: (NSParagraphStyle*)paragraphStyle
|
||
ruler: (NSRulerView*)aRulerView
|
||
{
|
||
NSRulerMarker *marker;
|
||
NSTextTab *tab;
|
||
NSImage *image;
|
||
NSArray *tabs = [paragraphStyle tabStops];
|
||
NSEnumerator *enumerator = [tabs objectEnumerator];
|
||
NSMutableArray *markers = [NSMutableArray arrayWithCapacity: [tabs count]];
|
||
|
||
while ((tab = [enumerator nextObject]) != nil)
|
||
{
|
||
switch ([tab tabStopType])
|
||
{
|
||
case NSLeftTabStopType:
|
||
image = [NSImage imageNamed: @"common_LeftTabStop"];
|
||
break;
|
||
case NSRightTabStopType:
|
||
image = [NSImage imageNamed: @"common_RightTabStop"];
|
||
break;
|
||
case NSCenterTabStopType:
|
||
image = [NSImage imageNamed: @"common_CenterTabStop"];
|
||
break;
|
||
case NSDecimalTabStopType:
|
||
image = [NSImage imageNamed: @"common_DecimalTabStop"];
|
||
break;
|
||
default:
|
||
image = nil;
|
||
break;
|
||
}
|
||
marker = [[NSRulerMarker alloc]
|
||
initWithRulerView: aRulerView
|
||
markerLocation: [tab location]
|
||
image: image
|
||
imageOrigin: NSMakePoint(0, 0)];
|
||
[marker setRepresentedObject: tab];
|
||
[markers addObject: marker];
|
||
}
|
||
|
||
return markers;
|
||
}
|
||
|
||
/*
|
||
* Managing the responder chain
|
||
*/
|
||
- (BOOL) layoutManagerOwnsFirstResponderInWindow: (NSWindow*)aWindow
|
||
{
|
||
id firstResponder = [aWindow firstResponder];
|
||
|
||
if (_textContainersCount == 1)
|
||
{
|
||
if (_firstTextView == firstResponder)
|
||
{
|
||
return YES;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < _textContainersCount; i++)
|
||
{
|
||
id tv = [[_textContainers objectAtIndex: i] textView];
|
||
|
||
if (tv == firstResponder)
|
||
{
|
||
return YES;
|
||
}
|
||
}
|
||
}
|
||
|
||
return NO;
|
||
}
|
||
|
||
- (NSTextView*) firstTextView
|
||
{
|
||
return _firstTextView;
|
||
}
|
||
|
||
- (NSTextView*) textViewForBeginningOfSelection
|
||
{
|
||
return nil;
|
||
}
|
||
|
||
- (void) drawBackgroundForGlyphRange: (NSRange)glyphRange
|
||
atPoint: (NSPoint)containerOrigin
|
||
{
|
||
NSTextContainer *aTextContainer;
|
||
|
||
aTextContainer = [self textContainerForGlyphAtIndex: glyphRange.location
|
||
effectiveRange: NULL];
|
||
|
||
[[[aTextContainer textView] backgroundColor] set];
|
||
|
||
NSRectFill ([self boundingRectForGlyphRange: glyphRange
|
||
inTextContainer: aTextContainer]);
|
||
}
|
||
|
||
- (void) drawGlyphsForGlyphRange: (NSRange)glyphRange
|
||
atPoint: (NSPoint)containerOrigin
|
||
{
|
||
/* TODO */
|
||
}
|
||
|
||
- (void) drawUnderlineForGlyphRange: (NSRange)glyphRange
|
||
underlineType: (int)underlineType
|
||
baselineOffset: (float)baselineOffset
|
||
lineFragmentRect: (NSRect)lineRect
|
||
lineFragmentGlyphRange: (NSRange)lineGlyphRange
|
||
containerOrigin: (NSPoint)containerOrigin
|
||
{
|
||
/* TODO */
|
||
}
|
||
|
||
- (void) underlineGlyphRange: (NSRange)glyphRange
|
||
underlineType: (int)underlineType
|
||
lineFragmentRect: (NSRect)lineRect
|
||
lineFragmentGlyphRange: (NSRange)lineGlyphRange
|
||
containerOrigin: (NSPoint)containerOrigin
|
||
{
|
||
/* TODO */
|
||
}
|
||
|
||
- (void) setDelegate: (id)aDelegate
|
||
{
|
||
_delegate = aDelegate;
|
||
}
|
||
|
||
- (id) delegate
|
||
{
|
||
return _delegate;
|
||
}
|
||
|
||
- (unsigned) _charIndexForInsertionPointMovingFromY: (float)position
|
||
bestX: (float)wanted
|
||
up: (BOOL)upFlag
|
||
textContainer: (NSTextContainer *)tc
|
||
{
|
||
[self subclassResponsibility: _cmd];
|
||
return 0;
|
||
}
|
||
|
||
|
||
@end /* NSLayoutManager */
|
||
|
||
/* The methods laid out here are not correct, however the code they
|
||
contain for the most part is. Therefore, my country and a handsome
|
||
gift of Ghiradelli chocolate to he who puts all the pieces together :) */
|
||
|
||
/*
|
||
* A little utility function to determine the range of characters in a
|
||
* scanner that are present in a specified character set. */
|
||
static inline NSRange
|
||
scanRange (NSScanner *scanner, NSCharacterSet* aSet)
|
||
{
|
||
unsigned start = [scanner scanLocation];
|
||
unsigned end = start;
|
||
|
||
if ([scanner scanCharactersFromSet: aSet intoString: 0] == YES)
|
||
{
|
||
end = [scanner scanLocation];
|
||
}
|
||
return NSMakeRange (start, end - start);
|
||
}
|
||
|
||
@implementation NSLayoutManager (Private)
|
||
- (int) _rebuildLayoutForTextContainer: (NSTextContainer*)aContainer
|
||
startingAtGlyphIndex: (int)glyphIndex
|
||
{
|
||
NSSize cSize = [aContainer containerSize];
|
||
float i = 0.0;
|
||
NSMutableArray *lineStarts = [NSMutableArray new];
|
||
NSMutableArray *lineEnds = [NSMutableArray new];
|
||
int indexToAdd;
|
||
NSScanner *lineScanner;
|
||
NSScanner *paragraphScanner;
|
||
BOOL lastLineForContainerReached = NO;
|
||
int previousScanLocation;
|
||
int previousParagraphLocation;
|
||
int endScanLocation;
|
||
int startIndex;
|
||
NSRect firstProposedRect;
|
||
NSRect secondProposedRect;
|
||
NSCharacterSet *selectionParagraphGranularitySet = [NSCharacterSet characterSetWithCharactersInString: @"\n"];
|
||
NSCharacterSet *selectionWordGranularitySet = [NSCharacterSet characterSetWithCharactersInString: @" "];
|
||
NSCharacterSet *invSelectionWordGranularitySet = [selectionWordGranularitySet invertedSet];
|
||
NSCharacterSet *invSelectionParagraphGranularitySet = [selectionParagraphGranularitySet invertedSet];
|
||
NSRange paragraphRange;
|
||
NSRange leadingSpacesRange;
|
||
NSRange currentStringRange;
|
||
NSRange trailingSpacesRange;
|
||
NSRange leadingNlRange;
|
||
NSRange trailingNlRange;
|
||
NSSize lSize;
|
||
float lineWidth = 0.0;
|
||
float ourLines = 0.0;
|
||
int beginLineIndex = 0;
|
||
|
||
NSLog(@"rebuilding Layout at index: %d.\n", glyphIndex);
|
||
|
||
// 1.) figure out how many glyphs we can fit in our container by
|
||
// breaking up glyphs from the first unlaid out glyph and breaking it
|
||
// into lines.
|
||
//
|
||
// 2.)
|
||
// a.) set the range for the container
|
||
// b.) for each line in step 1 we need to set a lineFragmentRect and
|
||
// an origin point.
|
||
|
||
|
||
// Here we go at part 1.
|
||
|
||
startIndex = glyphIndex;
|
||
|
||
paragraphScanner = [NSScanner scannerWithString: [_textStorage string]];
|
||
[paragraphScanner setCharactersToBeSkipped: nil];
|
||
|
||
[paragraphScanner setScanLocation: startIndex];
|
||
|
||
NSLog(@"length of textStorage: %d", [[_textStorage string] length]);
|
||
|
||
// NSLog(@"buffer: %@", [_textStorage string]);
|
||
|
||
/*
|
||
* This scanner eats one word at a time, we should have it imbeded in
|
||
* another scanner that snacks on paragraphs (i.e. lines that end with
|
||
* \n). Look in NSText.
|
||
*/
|
||
while (![paragraphScanner isAtEnd])
|
||
{
|
||
previousParagraphLocation = [paragraphScanner scanLocation];
|
||
beginLineIndex = previousParagraphLocation;
|
||
lineWidth = 0.0;
|
||
|
||
leadingNlRange
|
||
= scanRange(paragraphScanner, selectionParagraphGranularitySet);
|
||
paragraphRange
|
||
= scanRange(paragraphScanner, invSelectionParagraphGranularitySet);
|
||
trailingNlRange
|
||
= scanRange(paragraphScanner, selectionParagraphGranularitySet);
|
||
|
||
// NSLog(@"leadingNlRange: (%d, %d)", leadingNlRange.location, leadingNlRange.length);
|
||
|
||
// if (leadingNlRange.length)
|
||
// paragraphRange = NSUnionRange (leadingNlRange,paragraphRange);
|
||
// if (trailingNlRange.length)
|
||
// paragraphRange = NSUnionRange (trailingNlRange,paragraphRange);
|
||
|
||
NSLog(@"paragraphRange: (%d, %d)", paragraphRange.location, paragraphRange.length);
|
||
|
||
lineScanner = [NSScanner scannerWithString:
|
||
[[_textStorage string] substringWithRange: paragraphRange]];
|
||
[lineScanner setCharactersToBeSkipped: nil];
|
||
|
||
while (![lineScanner isAtEnd])
|
||
{
|
||
previousScanLocation = [lineScanner scanLocation];
|
||
|
||
// snack next word
|
||
leadingSpacesRange
|
||
= scanRange(lineScanner, selectionWordGranularitySet);
|
||
currentStringRange
|
||
= scanRange(lineScanner, invSelectionWordGranularitySet);
|
||
trailingSpacesRange
|
||
= scanRange(lineScanner, selectionWordGranularitySet);
|
||
|
||
if (leadingSpacesRange.length)
|
||
currentStringRange = NSUnionRange(leadingSpacesRange,currentStringRange);
|
||
if (trailingSpacesRange.length)
|
||
currentStringRange = NSUnionRange(trailingSpacesRange,currentStringRange);
|
||
|
||
lSize = [_textStorage sizeRange: currentStringRange];
|
||
|
||
// lSize = [_textStorage sizeRange:
|
||
//NSMakeRange(currentStringRange.location+paragraphRange.location+startIndex,
|
||
//currentStringRange.length)];
|
||
|
||
if ((lineWidth + lSize.width) < cSize.width)
|
||
{
|
||
if ([lineScanner isAtEnd])
|
||
{
|
||
NSLog(@"we are at end before finishing a line: %d.\n", [lineScanner scanLocation]);
|
||
NSLog(@"scanLocation = %d, previousParagraphLocation = %d, beginLineIndex = %d",
|
||
[lineScanner scanLocation],
|
||
previousParagraphLocation,
|
||
beginLineIndex);
|
||
[lineStarts addObject: [NSNumber
|
||
numberWithInt: beginLineIndex]];
|
||
[lineEnds addObject: [NSNumber
|
||
numberWithInt: (int)[lineScanner scanLocation] + previousParagraphLocation - (beginLineIndex)]];
|
||
lineWidth = 0.0;
|
||
}
|
||
|
||
lineWidth += lSize.width;
|
||
//NSLog(@"lineWidth: %f", lineWidth);
|
||
}
|
||
else
|
||
{
|
||
if (ourLines > cSize.height)
|
||
{
|
||
lastLineForContainerReached = YES;
|
||
break;
|
||
}
|
||
|
||
[lineScanner setScanLocation: previousScanLocation];
|
||
indexToAdd = previousScanLocation + previousParagraphLocation
|
||
- (beginLineIndex);
|
||
|
||
NSLog(@"previousScanLocation = %d, previousParagraphLocation = %d, beginLineIndex = %d indexToAdd = %d",
|
||
previousScanLocation,
|
||
previousParagraphLocation,
|
||
beginLineIndex,
|
||
indexToAdd);
|
||
|
||
ourLines += 20.0; // 14
|
||
lineWidth = 0.0;
|
||
|
||
[lineStarts addObject: [NSNumber
|
||
numberWithInt: beginLineIndex]];
|
||
[lineEnds addObject: [NSNumber numberWithInt: indexToAdd]];
|
||
beginLineIndex = previousScanLocation + previousParagraphLocation;
|
||
}
|
||
}
|
||
|
||
if (lastLineForContainerReached)
|
||
break;
|
||
}
|
||
|
||
endScanLocation = [paragraphScanner scanLocation];
|
||
|
||
NSLog(@"endScanLocation: %d", endScanLocation);
|
||
|
||
// set this container for that glyphrange
|
||
|
||
[self setTextContainer: aContainer
|
||
forGlyphRange: NSMakeRange(startIndex, endScanLocation - startIndex)];
|
||
|
||
NSLog(@"ok, move on to step 2.");
|
||
|
||
// step 2. break the lines up and assign rects to them.
|
||
|
||
for (i = 0; i < [lineStarts count]; i++)
|
||
{
|
||
NSRect aRect, bRect;
|
||
float padding = [aContainer lineFragmentPadding];
|
||
NSRange ourRange;
|
||
|
||
// NSLog(@"\t\t===> %d", [[lines objectAtIndex: i] intValue]);
|
||
|
||
ourRange = NSMakeRange ([[lineStarts objectAtIndex: i] intValue],
|
||
[[lineEnds objectAtIndex: i] intValue]);
|
||
|
||
/*
|
||
if (i == 0)
|
||
{
|
||
ourRange = NSMakeRange (startIndex,
|
||
[[lines objectAtIndex: i] intValue] - startIndex);
|
||
}
|
||
else
|
||
{
|
||
ourRange = NSMakeRange ([[lines objectAtIndex: i-1] intValue],
|
||
[[lines objectAtIndex: i] intValue] - [[lines objectAtIndex: i-1]
|
||
intValue]);
|
||
}
|
||
*/
|
||
NSLog(@"line: %@|", [[_textStorage string]
|
||
substringWithRange: ourRange]);
|
||
|
||
firstProposedRect = NSMakeRect (0, i * 14, cSize.width, 14);
|
||
|
||
// ask our textContainer to fix our lineFragment.
|
||
|
||
secondProposedRect = [aContainer
|
||
lineFragmentRectForProposedRect: firstProposedRect
|
||
sweepDirection: NSLineSweepLeft
|
||
movementDirection: NSLineMoveLeft
|
||
remainingRect: &bRect];
|
||
|
||
// set the line fragmentRect for this range.
|
||
|
||
[self setLineFragmentRect: secondProposedRect
|
||
forGlyphRange: ourRange
|
||
usedRect: aRect];
|
||
|
||
// set the location for this string to be 'show'ed.
|
||
|
||
[self setLocation: NSMakePoint(secondProposedRect.origin.x + padding,
|
||
secondProposedRect.origin.y + padding)
|
||
forStartOfGlyphRange: ourRange];
|
||
}
|
||
|
||
// bloody hack.
|
||
// if (moreText)
|
||
// [delegate layoutManager: self
|
||
// didCompleteLayoutForTextContainer: [textContainers objectAtIndex: i]
|
||
// atEnd: NO];
|
||
// else
|
||
// [delegate layoutManager: self
|
||
// didCompleteLayoutForTextContainer: [textContainers objectAtIndex: i]
|
||
// atEnd: YES];
|
||
|
||
[lineStarts release];
|
||
[lineEnds release];
|
||
|
||
return endScanLocation;
|
||
}
|
||
|
||
- (void) _doLayout
|
||
{
|
||
NSEnumerator *enumerator;
|
||
NSTextContainer *container;
|
||
int gIndex = 0;
|
||
|
||
NSLog(@"doLayout called.\n");
|
||
|
||
enumerator = [_textContainers objectEnumerator];
|
||
while ((container = [enumerator nextObject]) != nil)
|
||
{
|
||
gIndex = [self _rebuildLayoutForTextContainer: container
|
||
startingAtGlyphIndex: gIndex];
|
||
}
|
||
}
|
||
|
||
@end
|