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Fix select regression. 

Fix selection when part of the selected text is above/below a border.
Also, fix problems uncovered by static analysis.

Fixes #1261.
This commit is contained in:
RichardHitt 2015-08-20 00:23:17 +02:00 committed by tomek
parent 422cce6f70
commit 9664b1b7e3
1 changed files with 90 additions and 81 deletions
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171
src/fe-gtk/xtext.c
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@ -838,7 +838,6 @@ find_x (GtkXText *xtext, textentry *ent, int x, int subline, int indent)
int off, len, wid, mbl, mbw;
/* Skip to the first chunk of stuff for the subline */
list = ent->slp;
if (subline > 0)
{
suboff = GPOINTER_TO_INT (g_slist_nth_data (ent->sublines, subline - 1));
@ -855,6 +854,8 @@ find_x (GtkXText *xtext, textentry *ent, int x, int subline, int indent)
list = ent->slp;
}
/* Step to the first character of the subline */
if (list == NULL)
return 0;
meta = list->data;
off = meta->off;
len = meta->len;
@ -943,12 +944,12 @@ gtk_xtext_find_x (GtkXText * xtext, int x, textentry * ent, int subline,
}
static textentry *
gtk_xtext_find_char (GtkXText * xtext, int x, int y, int *off,
int *out_of_bounds, int *ret_subline)
gtk_xtext_find_char (GtkXText * xtext, int x, int y, int *off, int *out_of_bounds)
{
textentry *ent;
int line;
int subline;
int outofbounds;
/* Adjust y value for negative rounding, double to int */
if (y < 0)
@ -960,10 +961,9 @@ gtk_xtext_find_char (GtkXText * xtext, int x, int y, int *off,
return NULL;
if (off)
*off = gtk_xtext_find_x (xtext, x, ent, subline, line, out_of_bounds);
if (ret_subline)
*ret_subline = subline;
*off = gtk_xtext_find_x (xtext, x, ent, subline, line, &outofbounds);
if (out_of_bounds)
*out_of_bounds = outofbounds;
return ent;
}
@ -1058,14 +1058,14 @@ gtk_xtext_paint (GtkWidget *widget, GdkRectangle *area)
return;
}
ent_start = gtk_xtext_find_char (xtext, area->x, area->y, NULL, NULL, NULL);
ent_start = gtk_xtext_find_char (xtext, area->x, area->y, NULL, NULL);
if (!ent_start)
{
xtext_draw_bg (xtext, area->x, area->y, area->width, area->height);
goto xit;
}
ent_end = gtk_xtext_find_char (xtext, area->x + area->width,
area->y + area->height, NULL, NULL, NULL);
area->y + area->height, NULL, NULL);
if (!ent_end)
ent_end = xtext->buffer->text_last;
@ -1253,13 +1253,14 @@ lamejump:
}
}
/* marking upward? */
else if (xtext->buffer->last_ent_end == end_ent &&
else if (xtext->buffer->last_ent_start != NULL &&
xtext->buffer->last_ent_end == end_ent &&
xtext->buffer->last_offset_end == end_offset)
{
ent = end_ent;
while (ent)
{
if (ent == start_ent)
if (ent == start_ent && xtext->buffer->last_ent_start)
{
gtk_xtext_selection_up (xtext, xtext->buffer->last_ent_start, ent, start_offset);
/*gtk_xtext_render_ents (xtext, xtext->buffer->last_ent_start, ent);*/
@ -1308,99 +1309,104 @@ gtk_xtext_selection_draw (GtkXText * xtext, GdkEventMotion * event, gboolean ren
textentry *ent;
textentry *ent_end;
textentry *ent_start;
int offset_start;
int offset_end;
int subline_start;
int subline_end;
int oob;
int marking_up = FALSE;
int len_start;
int len_end;
int offset_start = 0;
int offset_end = 0;
textentry *low_ent, *high_ent;
int low_x, low_y, low_offs;
int high_x, high_y, high_offs, high_len;
ent_start = gtk_xtext_find_char (xtext, xtext->select_start_x, xtext->select_start_y, &offset_start, &oob, &subline_start);
ent_end = gtk_xtext_find_char (xtext, xtext->select_end_x, xtext->select_end_y, &offset_end, &oob, &subline_end);
if ((!ent_start || !ent_end) && !xtext->buffer->text_last && xtext->adj->value != xtext->buffer->old_value)
{
gtk_xtext_render_page (xtext);
if (xtext->buffer->text_first == NULL)
return;
}
if (!ent_start)
{
ent_start = xtext->buffer->text_last;
offset_start = ent_start->str_len;
}
ent_start = gtk_xtext_find_char (xtext, xtext->select_start_x, xtext->select_start_y, &offset_start, NULL);
ent_end = gtk_xtext_find_char (xtext, xtext->select_end_x, xtext->select_end_y, &offset_end, NULL);
if (ent_start == NULL && ent_end == NULL)
return;
if (!ent_end)
if ((ent_start != ent_end && xtext->select_start_y > xtext->select_end_y) || /* different entries */
(ent_start == ent_end && offset_start > offset_end)) /* same entry, different character offsets */
{
ent_end = xtext->buffer->text_last;
offset_end = ent_end->str_len;
/* marking up */
low_ent = ent_end;
low_x = xtext->select_end_x;
low_y = xtext->select_end_y;
low_offs = offset_end;
high_ent = ent_start;
high_x = xtext->select_start_x;
high_y = xtext->select_start_y;
high_offs = offset_start;
}
if ((ent_start != ent_end && xtext->select_start_y > xtext->select_end_y) || /* different entries */
(ent_start == ent_end && subline_start > subline_end) || /* different lines */
(ent_start == ent_end && subline_start == subline_end && xtext->select_start_x > xtext->select_end_x)) /* marking to the left */
else
{
marking_up = TRUE;
/* marking down */
low_ent = ent_start;
low_x = xtext->select_start_x;
low_y = xtext->select_start_y;
low_offs = offset_start;
high_ent = ent_end;
high_x = xtext->select_end_x;
high_y = xtext->select_end_y;
high_offs = offset_end;
}
if (low_ent == NULL)
{
low_ent = xtext->buffer->text_first;
low_offs = 0;
}
if (high_ent == NULL)
{
high_ent = xtext->buffer->text_last;
high_offs = high_ent->str_len;
}
/* word selection */
if (xtext->word_select)
{
/* a word selection cannot be started if the cursor is out of bounds in gtk_xtext_button_press */
gtk_xtext_get_word (xtext, xtext->select_start_x, xtext->select_start_y, NULL, &offset_start, &len_start, NULL);
gtk_xtext_get_word (xtext, low_x, low_y, NULL, &low_offs, NULL, NULL);
/* in case the cursor is out of bounds we keep offset_end from gtk_xtext_find_char and fix the length */
if (gtk_xtext_get_word (xtext, xtext->select_end_x, xtext->select_end_y, NULL, &offset_end, &len_end, NULL) == NULL)
len_end = offset_end == ent_end->str_len? 0: -1; /* -1 for the space, 0 if at the end */
if (!marking_up)
offset_end += len_end;
else
offset_start += len_start;
if (gtk_xtext_get_word (xtext, high_x, high_y, NULL, &high_offs, &high_len, NULL) == NULL)
high_len = high_offs == high_ent->str_len? 0: -1; /* -1 for the space, 0 if at the end */
high_offs += high_len;
if (low_y < 0)
low_offs = xtext->buffer->last_offset_start;
if (high_y > xtext->buffer->window_height)
high_offs = xtext->buffer->last_offset_end;
}
/* line/ent selection */
else if (xtext->line_select)
{
offset_start = marking_up? ent_start->str_len: 0;
offset_end = marking_up? 0: ent_end->str_len;
low_offs = 0;
high_offs = high_ent->str_len;
}
if (marking_up)
/* character selection */
else
{
int temp;
/* ensure ent_start is above ent_end */
if (ent_start != ent_end)
{
ent = ent_start;
ent_start = ent_end;
ent_end = ent;
}
/* switch offsets as well */
temp = offset_start;
offset_start = offset_end;
offset_end = temp;
if (low_y < 0)
low_offs = xtext->buffer->last_offset_start;
if (high_y > xtext->buffer->window_height)
high_offs = xtext->buffer->last_offset_end;
}
/* set all the old mark_ fields to -1 */
gtk_xtext_selection_clear (xtext->buffer);
/* set the default values */
ent_start->mark_end = ent_start->str_len;
ent_end->mark_start = 0;
low_ent->mark_start = low_offs;
low_ent->mark_end = high_offs;
/* set the calculated values (this overwrites the default values if we're on the same ent) */
ent_start->mark_start = offset_start;
ent_end->mark_end = offset_end;
/* set all the mark_ fields of the ents within the selection */
if (ent_start != ent_end)
if (low_ent != high_ent)
{
ent = ent_start->next;
while (ent && ent != ent_end)
low_ent->mark_end = low_ent->str_len;
if (high_offs != 0)
{
high_ent->mark_start = 0;
high_ent->mark_end = high_offs;
}
/* set all the mark_ fields of the ents within the selection */
ent = low_ent->next;
while (ent && ent != high_ent)
{
ent->mark_start = 0;
ent->mark_end = ent->str_len;
@ -1409,7 +1415,7 @@ gtk_xtext_selection_draw (GtkXText * xtext, GdkEventMotion * event, gboolean ren
}
if (render)
gtk_xtext_selection_render (xtext, ent_start, ent_end);
gtk_xtext_selection_render (xtext, low_ent, high_ent);
}
static int
@ -1541,7 +1547,7 @@ gtk_xtext_get_word (GtkXText * xtext, int x, int y, textentry ** ret_ent,
int out_of_bounds = 0;
int len_to_offset = 0;
ent = gtk_xtext_find_char (xtext, x, y, &offset, &out_of_bounds, NULL);
ent = gtk_xtext_find_char (xtext, x, y, &offset, &out_of_bounds);
if (ent == NULL || out_of_bounds || offset < 0 || offset >= ent->str_len)
return NULL;
@ -4202,7 +4208,6 @@ gtk_xtext_search_textentry (xtext_buffer *buf, textentry *ent)
hay = match? g_strdup (str): g_utf8_casefold (str, lstr);
lhay = strlen (hay);
off = 0;
for (pos = hay, len = lhay; len;
off += buf->search_lnee, pos = hay + off, len = lhay - off)
@ -4754,8 +4759,11 @@ gtk_xtext_lastlog (xtext_buffer *out, xtext_buffer *search_area)
gtk_xtext_append (out, ent->str, ent->str_len, 0);
}
out->text_last->stamp = ent->stamp;
gtk_xtext_search_textentry_add (out, out->text_last, gl, TRUE);
if (out->text_last)
{
out->text_last->stamp = ent->stamp;
gtk_xtext_search_textentry_add (out, out->text_last, gl, TRUE);
}
}
ent = ent->next;
}
@ -4949,6 +4957,7 @@ gtk_xtext_buffer_show (GtkXText *xtext, xtext_buffer *buf, int render)
if (buf->window_width != w)
{
buf->window_width = w;
buf->window_height = h;
gtk_xtext_calc_lines (buf, FALSE);
if (buf->scrollbar_down)
gtk_adjustment_set_value (xtext->adj, xtext->adj->upper -