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Robust detection of scroll changes.

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This commit is contained in:
Michael Drake 2013-03-20 19:52:10 +00:00
parent c568a9626b
commit 8e360ff040
1 changed files with 17 additions and 6 deletions
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23
desktop/textarea.c
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@ -1963,11 +1963,15 @@ bool textarea_keypress(struct textarea *ta, uint32_t key)
struct textarea_msg msg;
char utf8[6];
unsigned int caret, length, b_off, b_len;
int h_extent = ta->h_extent;
int v_extent = ta->v_extent;
int line;
int byte_delta = 0;
int x, y;
bool redraw = false;
bool readonly;
bool bar_x = ta->bar_x;
bool bar_y = ta->bar_y;
/* Word separators */
static const char *sep = " .\n";
@ -2361,16 +2365,23 @@ bool textarea_keypress(struct textarea *ta, uint32_t key)
redraw &= ~textarea_set_caret_internal(ta, caret);
/* TODO: redraw only the bit that changed */
if (redraw) {
msg.ta = ta;
msg.type = TEXTAREA_MSG_REDRAW_REQUEST;
msg.data.redraw.x0 = ta->border_width;
msg.data.redraw.y0 = ta->border_width;
msg.ta = ta;
msg.type = TEXTAREA_MSG_REDRAW_REQUEST;
msg.data.redraw.x0 = ta->border_width;
msg.data.redraw.y0 = ta->border_width;
if (bar_x != (ta->bar_x != NULL) || bar_y != (ta->bar_y != NULL) ||
h_extent != ta->h_extent || v_extent != ta->v_extent) {
/* Must redraw since scrollbars have changed */
msg.data.redraw.x1 = ta->vis_width - ta->border_width;
msg.data.redraw.y1 = ta->vis_height - ta->border_width;
ta->callback(ta->data, &msg);
} else if (redraw) {
msg.data.redraw.x1 = ta->vis_width - ta->border_width -
((ta->bar_y == NULL) ? 0 : SCROLLBAR_WIDTH);
msg.data.redraw.y1 = ta->vis_height - ta->border_width -
((ta->bar_x == NULL) ? 0 : SCROLLBAR_WIDTH);
ta->callback(ta->data, &msg);
}