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Fix clipping of xwidgets

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* src/xwidget.c (x_draw_xwidget_glyph_string): Use window_box
instead of calculating the clipping borders manually.  Suggested
by YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>.
This commit is contained in:
Joakim Verona 2016-04-09 15:04:54 +03:00 • committed by Eli Zaretskii
parent e87fbc0780
commit 97211f3630
1 changed files with 15 additions and 17 deletions
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32
src/xwidget.c
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@ -578,24 +578,22 @@ x_draw_xwidget_glyph_string (struct glyph_string *s)
other time to know things like window placement etc. */
xv = xwidget_init_view (xww, s, x, y);
/* Calculate clipping, which is used for all manner of onscreen
xwidget views. Each widget border can get clipped by other emacs
objects so there are four clipping variables. */
clip_right =
min (xww->width,
WINDOW_RIGHT_EDGE_X (s->w) - x -
WINDOW_RIGHT_SCROLL_BAR_AREA_WIDTH (s->w) -
WINDOW_RIGHT_FRINGE_WIDTH (s->w));
clip_left =
max (0,
WINDOW_LEFT_EDGE_X (s->w) - x +
WINDOW_LEFT_SCROLL_BAR_AREA_WIDTH (s->w) +
WINDOW_LEFT_FRINGE_WIDTH (s->w));
int text_area_x, text_area_y, text_area_width, text_area_height;
clip_bottom =
min (xww->height,
WINDOW_BOTTOM_EDGE_Y (s->w) - WINDOW_MODE_LINE_HEIGHT (s->w) - y);
clip_top = max (0, WINDOW_TOP_EDGE_Y (s->w) - y);
window_box (s->w,
ANY_AREA,
&text_area_x,
&text_area_y,
&text_area_width,
&text_area_height);
clip_right = min (xww->width,
text_area_width);
clip_left = max (0,
text_area_x);
clip_bottom = min (xww->height,
text_area_height);
clip_top = max (0, text_area_y);
/* We are concerned with movement of the onscreen area. The area
might sit still when the widget actually moves. This happens