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quakeforge/libs/ui/view.c
Bill Currie 41d25df0d2 [ui] Attach text views to passage entities 
Instead of creating new entities for the text views. This approximately
halves the number of entities required to display flowed text, but also
tests the ability to have an entity in multiple hierarchies (the goal of
the ECS component and system changes).
2022-12-14 22:38:37 +09:00

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/*
view.c
console view object
Copyright (C) 2003 Bill Currie
Author: Bill Currie <bill@taniwha.org>
Date: 2003/5/5
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <stdlib.h>
#include "QF/cexpr.h"
#include "QF/mathlib.h"
#define IMPLEMENT_VIEW_Funcs
#include "QF/ui/view.h"
static exprenum_t grav_t_enum;
exprtype_t grav_t_type = {
.name = "grav_t",
.size = sizeof (grav_t),
.data = &grav_t_enum,
.get_string = cexpr_enum_get_string,
};
static grav_t grav_t_values[] = {
grav_center,
grav_north,
grav_northeast,
grav_east,
grav_southeast,
grav_south,
grav_southwest,
grav_west,
grav_northwest,
};
static exprsym_t grav_t_symbols[] = {
{ "center", &grav_t_type, grav_t_values + grav_center },
{ "north", &grav_t_type, grav_t_values + grav_north },
{ "northeast", &grav_t_type, grav_t_values + grav_northeast },
{ "east", &grav_t_type, grav_t_values + grav_east },
{ "southeast", &grav_t_type, grav_t_values + grav_southeast },
{ "south", &grav_t_type, grav_t_values + grav_south },
{ "southwest", &grav_t_type, grav_t_values + grav_southwest },
{ "west", &grav_t_type, grav_t_values + grav_west },
{ "northwest", &grav_t_type, grav_t_values + grav_northwest },
{}
};
static exprtab_t grav_t_symtab = {
grav_t_symbols,
};
static exprenum_t grav_t_enum = {
&grav_t_type,
&grav_t_symtab,
};
static void
view_modified_init (void *_modified)
{
byte *modified = _modified;
*modified = 1;
}
const component_t view_components[view_comp_count] = {
[view_href] = {
.size = sizeof (hierref_t),
.name = "view href",
},
};
static const component_t view_type_components[view_type_count] = {
[view_pos] = {
.size = sizeof (view_pos_t),
.name = "pos",
},
[view_len] = {
.size = sizeof (view_pos_t),
.name = "len",
},
[view_abs] = {
.size = sizeof (view_pos_t),
.name = "abs",
},
[view_rel] = {
.size = sizeof (view_pos_t),
.name = "rel",
},
[view_oldlen] = {
.size = sizeof (view_pos_t),
.name = "oldlen",
},
[view_control] = {
.size = sizeof (viewcont_t),
.name = "control",
},
[view_modified] = {
.size = sizeof (byte),
.create = view_modified_init,
.name = "modified",
},
[view_onresize] = {
.size = sizeof (view_resize_f),
.name = "onresize",
},
[view_onmove] = {
.size = sizeof (view_move_f),
.name = "onmove",
},
};
static const hierarchy_type_t view_type = {
.num_components = view_type_count,
.components = view_type_components,
};
view_t
View_AddToEntity (uint32_t ent, ecs_system_t viewsys, view_t parent)
{
uint32_t href_comp = viewsys.base + view_href;
hierref_t *ref = Ent_AddComponent (ent, href_comp, viewsys.reg);
if (parent.reg && parent.id != nullent) {
hierref_t *pref = View_GetRef (parent);
ref->hierarchy = pref->hierarchy;
ref->index = Hierarchy_InsertHierarchy (pref->hierarchy, 0,
pref->index, 0);
} else {
ref->hierarchy = Hierarchy_New (viewsys.reg, href_comp, &view_type, 1);
ref->index = 0;
}
ref->hierarchy->ent[ref->index] = ent;
return (view_t) { .reg = viewsys.reg, .id = ent, .comp = href_comp };
}
view_t
View_New (ecs_system_t viewsys, view_t parent)
{
uint32_t view = ECS_NewEntity (viewsys.reg);
return View_AddToEntity (view, viewsys, parent);
}
void
View_UpdateHierarchy (view_t view)
{
__auto_type ref = View_GetRef (view);
hierarchy_t *h = ref->hierarchy;
byte *modified = h->components[view_modified];
view_pos_t *pos = h->components[view_pos];
view_pos_t *len = h->components[view_len];
view_pos_t *abs = h->components[view_abs];
view_pos_t *rel = h->components[view_rel];
view_pos_t *oldlen = h->components[view_oldlen];
viewcont_t *cont = h->components[view_control];
view_resize_f *onresize = h->components[view_onresize];
view_resize_f *onmove = h->components[view_onmove];
uint32_t *parent = h->parentIndex;
uint32_t *id = h->ent;
if (abs[0].x != pos[0].x || abs[0].y != pos[0].y) {
modified[0] |= 1;
abs[0] = pos[0];
rel[0] = pos[0];
}
if (oldlen[0].x != len[0].x || oldlen[0].y != len[0].y) {
modified[0] |= 2;
if (onresize[0]) {
view_t v = { .reg = view.reg, .id = id[0], .comp = view.comp };
onresize[0] (v, len[0]);
}
}
for (uint32_t i = 1; i < h->num_objects; i++) {
uint32_t par = parent[i];
if (!(modified[i] & 2) && (modified[par] & 2)
&& (cont[i].resize_x || cont[i].resize_y)) {
int dx = len[par].x - oldlen[par].x;
int dy = len[par].y - oldlen[par].y;
modified[i] |= 2; // propogate resize modifications
oldlen[i] = len[i]; // for child resize calculations
if (cont[i].resize_x) {
len[i].x += dx;
}
if (cont[i].resize_y) {
len[i].y += dy;
}
if (onresize[i]) {
view_t v = { .reg = view.reg, .id = id[i],
.comp = view.comp };
onresize[i] (v, len[i]);
}
}
if (modified[i] || modified[par]) {
modified[i] |= 1; // propogate motion modifications
switch (cont[i].gravity) {
case grav_center:
rel[i].x = pos[i].x + (len[par].x - len[i].x) / 2;
rel[i].y = pos[i].y + (len[par].y - len[i].y) / 2;
break;
case grav_north:
rel[i].x = pos[i].x + (len[par].x - len[i].x) / 2;
rel[i].y = pos[i].y;
break;
case grav_northeast:
rel[i].x = len[par].x - pos[i].x - len[i].x;
rel[i].y = pos[i].y;
break;
case grav_east:
rel[i].x = len[par].x - pos[i].x - len[i].x;
rel[i].y = pos[i].y + (len[par].y - len[i].y) / 2;
break;
case grav_southeast:
rel[i].x = len[par].x - pos[i].x - len[i].x;
rel[i].y = len[par].y - pos[i].y - len[i].y;
break;
case grav_south:
rel[i].x = pos[i].x + (len[par].x - len[i].x) / 2;
rel[i].y = len[par].y - pos[i].y - len[i].y;
break;
case grav_southwest:
rel[i].x = pos[i].x;
rel[i].y = len[par].y - pos[i].y - len[i].y;
break;
case grav_west:
rel[i].x = pos[i].x;
rel[i].y = pos[i].y + (len[par].y - len[i].y) / 2;
break;
case grav_northwest:
rel[i].x = pos[i].x;
rel[i].y = pos[i].y;
break;
case grav_flow:
//rel is set by the flow functions
break;
}
abs[i].x = abs[par].x + rel[i].x;
abs[i].y = abs[par].y + rel[i].y;
}
}
for (uint32_t i = 0; i < h->num_objects; i++) {
if (modified[i] & 2) {
oldlen[i] = len[i];
}
if ((modified[i] & 1) && onmove[i]) {
view_t v = { .reg = view.reg, .id = id[i], .comp = view.comp };
onmove[i] (v, abs[i]);
}
modified[i] = 0;
}
}
void
View_SetParent (view_t view, view_t parent)
{
hierarchy_t *dst = 0;
uint32_t dstParent = nullent;
hierarchy_t *src = 0;
uint32_t srcIndex = 0;
if (View_Valid (parent)) {
__auto_type ref = View_GetRef (parent);
dst = ref->hierarchy;
dstParent = ref->index;
}
{
__auto_type ref = View_GetRef (view);
src = ref->hierarchy;
srcIndex = ref->index;
}
Hierarchy_SetParent (dst, dstParent, src, srcIndex);
__auto_type ref = View_GetRef (view);
hierarchy_t *h = ref->hierarchy;
byte *modified = h->components[view_modified];
modified[ref->index] = 1;
View_UpdateHierarchy (view);
}
typedef struct flowline_s {
struct flowline_s *next;
int first_child;
int child_count;
int cursor;
int height; // from baseline
int depth; // from baseline
} flowline_t;
#define NEXT_LINE(line, child_index) \
do { \
line->next = alloca (sizeof (flowline_t)); \
memset (line->next, 0, sizeof (flowline_t)); \
line = line->next; \
line->first_child = child_index; \
} while (0)
static void
flow_right (view_t view, void (*set_rows) (view_t, flowline_t *))
{
__auto_type ref = View_GetRef (view);
hierarchy_t *h = ref->hierarchy;
view_pos_t *pos = h->components[view_pos];
view_pos_t *len = h->components[view_len];
viewcont_t *cont = h->components[view_control];
uint32_t vind = ref->index;
flowline_t flowline = { .first_child = h->childIndex[ref->index] };
flowline_t *line = &flowline;
for (uint32_t i = 0; i < h->childCount[vind]; i++) {
uint32_t child = h->childIndex[vind] + i;
if (line->cursor && line->cursor + len[child].x > len[vind].x) {
NEXT_LINE(line, child);
}
pos[child].x = line->cursor;
if (pos[child].x || !cont[child].bol_suppress) {
line->cursor += len[child].x;
}
line->height = max (len[child].y - pos[child].y, line->height);
line->depth = max (pos[child].y, line->depth);
line->child_count++;
}
set_rows (view, &flowline);
}
static void
flow_left (view_t view, void (*set_rows) (view_t, flowline_t *))
{
__auto_type ref = View_GetRef (view);
hierarchy_t *h = ref->hierarchy;
view_pos_t *pos = h->components[view_pos];
view_pos_t *len = h->components[view_len];
viewcont_t *cont = h->components[view_control];
uint32_t vind = ref->index;
flowline_t flowline = { .first_child = h->childIndex[ref->index] };
flowline_t *line = &flowline;
line->cursor = len[vind].x;
for (uint32_t i = 0; i < h->childCount[vind]; i++) {
uint32_t child = h->childIndex[ref->index] + i;
if (line->cursor < len[vind].x && line->cursor - len[child].x < 0) {
NEXT_LINE(line, child);
line->cursor = len[vind].x;
}
if (pos[child].x < len[vind].x || !cont[child].bol_suppress) {
line->cursor -= len[child].x;
}
pos[child].x = line->cursor;
line->height = max (len[child].y - pos[child].y, line->height);
line->depth = max (pos[child].y, line->depth);
line->child_count++;
}
set_rows (view, &flowline);
}
static void
flow_down (view_t view, void (*set_rows) (view_t, flowline_t *))
{
__auto_type ref = View_GetRef (view);
hierarchy_t *h = ref->hierarchy;
view_pos_t *pos = h->components[view_pos];
view_pos_t *len = h->components[view_len];
viewcont_t *cont = h->components[view_control];
uint32_t vind = ref->index;
flowline_t flowline = { .first_child = h->childIndex[ref->index] };
flowline_t *line = &flowline;
for (uint32_t i = 0; i < h->childCount[vind]; i++) {
uint32_t child = h->childIndex[vind] + i;
if (line->cursor && line->cursor + len[child].y > len[vind].y) {
NEXT_LINE(line, child);
}
pos[child].y = line->cursor;
if (pos[child].y || !cont[child].bol_suppress) {
line->cursor += len[child].y;
}
line->height = max (len[child].x - pos[child].x, line->height);
line->depth = max (pos[child].x, line->depth);
line->child_count++;
}
set_rows (view, &flowline);
}
static void
flow_up (view_t view, void (*set_rows) (view_t, flowline_t *))
{
__auto_type ref = View_GetRef (view);
hierarchy_t *h = ref->hierarchy;
view_pos_t *pos = h->components[view_pos];
view_pos_t *len = h->components[view_len];
viewcont_t *cont = h->components[view_control];
uint32_t vind = ref->index;
flowline_t flowline = { .first_child = h->childIndex[ref->index] };
flowline_t *line = &flowline;
line->cursor = len[vind].y;
for (uint32_t i = 0; i < h->childCount[vind]; i++) {
uint32_t child = h->childIndex[ref->index] + i;
if (line->cursor < len[vind].y && line->cursor - len[child].y < 0) {
NEXT_LINE(line, child);
line->cursor = len[vind].y;
}
if (pos[child].y < len[vind].y || !cont[child].bol_suppress) {
line->cursor -= len[child].y;
}
pos[child].y = line->cursor;
line->height = max (len[child].x - pos[child].x, line->height);
line->depth = max (pos[child].x, line->depth);
line->child_count++;
}
set_rows (view, &flowline);
}
static void
flow_view_height (view_pos_t *len, flowline_t *flowlines)
{
len->y = 0;
for (flowline_t *line = flowlines; line; line = line->next) {
len->y += line->height + line->depth;
}
}
static void
flow_view_width (view_pos_t *len, flowline_t *flowlines)
{
len->x = 0;
for (flowline_t *line = flowlines; line; line = line->next) {
len->x += line->height + line->depth;
}
}
static void
set_rows_down (view_t view, flowline_t *flowlines)
{
__auto_type ref = View_GetRef (view);
hierarchy_t *h = ref->hierarchy;
view_pos_t *pos = h->components[view_pos];
view_pos_t *rel = h->components[view_rel];
view_pos_t *len = h->components[view_len];
viewcont_t *cont = h->components[view_control];
uint32_t vind = ref->index;
if (cont[vind].flow_size) {
flow_view_height (&len[ref->index], flowlines);
}
int cursor = 0;
for (flowline_t *line = flowlines; line; line = line->next) {
cursor += line->height;
for (int i = 0; i < line->child_count; i++) {
uint32_t child = line->first_child + i;
rel[child].x = pos[child].x;
rel[child].y = cursor + pos[child].y - len[child].y;
}
cursor += line->depth;
}
}
static void
set_rows_up (view_t view, flowline_t *flowlines)
{
__auto_type ref = View_GetRef (view);
hierarchy_t *h = ref->hierarchy;
view_pos_t *pos = h->components[view_pos];
view_pos_t *rel = h->components[view_rel];
view_pos_t *len = h->components[view_len];
viewcont_t *cont = h->components[view_control];
uint32_t vind = ref->index;
if (cont[vind].flow_size) {
flow_view_height (&len[ref->index], flowlines);
}
int cursor = len[vind].y;
for (flowline_t *line = flowlines; line; line = line->next) {
cursor -= line->depth;
for (int i = 0; i < line->child_count; i++) {
uint32_t child = line->first_child + i;
rel[child].x = pos[child].x;
rel[child].y = cursor + pos[child].y - len[child].y;
}
cursor -= line->height;
}
}
static void
set_columns_right (view_t view, flowline_t *flowlines)
{
__auto_type ref = View_GetRef (view);
hierarchy_t *h = ref->hierarchy;
view_pos_t *pos = h->components[view_pos];
view_pos_t *rel = h->components[view_rel];
view_pos_t *len = h->components[view_len];
viewcont_t *cont = h->components[view_control];
uint32_t vind = ref->index;
if (cont[vind].flow_size) {
flow_view_width (&len[ref->index], flowlines);
}
int cursor = 0;
for (flowline_t *line = flowlines; line; line = line->next) {
cursor += line->depth;
for (int i = 0; i < line->child_count; i++) {
uint32_t child = line->first_child + i;
rel[child].x = cursor + pos[child].x;
rel[child].y = pos[child].y;
}
cursor += line->height;
}
}
static void
set_columns_left (view_t view, flowline_t *flowlines)
{
__auto_type ref = View_GetRef (view);
hierarchy_t *h = ref->hierarchy;
view_pos_t *pos = h->components[view_pos];
view_pos_t *rel = h->components[view_rel];
view_pos_t *len = h->components[view_len];
viewcont_t *cont = h->components[view_control];
uint32_t vind = ref->index;
if (cont[vind].flow_size) {
flow_view_width (&len[ref->index], flowlines);
}
int cursor = len[vind].x;
for (flowline_t *line = flowlines; line; line = line->next) {
cursor -= line->height;
for (int i = 0; i < line->child_count; i++) {
uint32_t child = line->first_child + i;
rel[child].x = cursor + pos[child].x;
rel[child].y = pos[child].y;
}
cursor -= line->depth;
}
}
VISIBLE void
view_flow_right_down (view_t view, view_pos_t len)
{
flow_right (view, set_rows_down);
}
VISIBLE void
view_flow_right_up (view_t view, view_pos_t len)
{
flow_right (view, set_rows_up);
}
VISIBLE void
view_flow_left_down (view_t view, view_pos_t len)
{
flow_left (view, set_rows_down);
}
VISIBLE void
view_flow_left_up (view_t view, view_pos_t len)
{
flow_left (view, set_rows_up);
}
VISIBLE void
view_flow_down_right (view_t view, view_pos_t len)
{
flow_down (view, set_columns_right);
}
VISIBLE void
view_flow_up_right (view_t view, view_pos_t len)
{
flow_up (view, set_columns_right);
}
VISIBLE void
view_flow_down_left (view_t view, view_pos_t len)
{
flow_down (view, set_columns_left);
}
VISIBLE void
view_flow_up_left (view_t view, view_pos_t len)
{
flow_up (view, set_columns_left);
}
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