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[qwaq] Update line and char indices with cursor motion

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This commit is contained in:
Bill Currie 2021-06-08 16:48:24 +09:00
parent 1f6a4ed941
commit c06acd3b53
1 changed files with 11 additions and 1 deletions
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12
ruamoko/qwaq/editor/editor.r
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@ -182,10 +182,13 @@ handleEvent (Editor *self, qwaq_event_t *event)
-cursorUp:(unsigned)count
{
[self recenter:0];
if (count > cursor.y) {
count = cursor.y;
}
cursor.y -= count;
line_index = [buffer prevLine:line_index :count];
char_index = [buffer charPtr:line_index at:cursor.x];
if (base.y > cursor.y) {
[vScrollBar setIndex:cursor.y];
}
@ -195,10 +198,13 @@ handleEvent (Editor *self, qwaq_event_t *event)
-cursorDown:(unsigned)count
{
[self recenter:0];
if (count > line_count - cursor.y) {
count = line_count - cursor.y;
}
cursor.y += count;
line_index = [buffer nextLine:line_index :count];
char_index = [buffer charPtr:line_index at:cursor.x];
if (base.y + ylen - 1 < cursor.y) {
[vScrollBar setIndex:cursor.y + 1 - ylen];
}
@ -208,10 +214,12 @@ handleEvent (Editor *self, qwaq_event_t *event)
-cursorLeft:(unsigned)count
{
[self recenter:0];
if (count > cursor.x) {
count = cursor.x;
}
cursor.x -= count;
char_index = [buffer charPtr:line_index at:cursor.x];
if (base.x > cursor.x) {
[hScrollBar setIndex:cursor.x];
}
@ -221,8 +229,10 @@ handleEvent (Editor *self, qwaq_event_t *event)
-cursorRight:(unsigned)count
{
[self recenter:0];
// FIXME handle horizontal scrolling and how to deal with max scroll
cursor.x += count;
char_index = [buffer charPtr:line_index at:cursor.x];
if (base.x + xlen - 1 < cursor.x) {
[hScrollBar setIndex:cursor.x + 1 - xlen];
}
@ -283,7 +293,7 @@ trackCursor (Editor *self)
}
cursor.y = line;
char_index = [buffer charPtr:line_index at:cursor.x];
[self recenter: 0];
[self recenter:0];
[self moveCursor: {cursor.x - base.x, cursor.y - base.y}];
return self;
}