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Add support for CSS clip property.

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This commit is contained in:
Michael Drake 2012-11-06 18:19:37 +00:00
parent b736ea73d4
commit 733fd39417
1 changed files with 42 additions and 1 deletions
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43
render/html_redraw.c
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@ -269,6 +269,7 @@ bool html_redraw_box(const html_content *html, struct box *box,
int x_scrolled, y_scrolled;
struct box *bg_box = NULL;
bool has_x_scroll, has_y_scroll;
css_computed_clip_rect css_rect;
if (html_redraw_printing && (box->flags & PRINTED))
return true;
@ -397,7 +398,47 @@ bool html_redraw_box(const html_content *html, struct box *box,
if ((plot->group_start) && (!plot->group_start("vis box")))
return false;
if (box->type == BOX_BLOCK || box->type == BOX_INLINE_BLOCK ||
if (box->style != NULL &&
css_computed_position(box->style) ==
CSS_POSITION_ABSOLUTE &&
css_computed_clip(box->style, &css_rect) ==
CSS_CLIP_RECT) {
/* We have an absolutly positioned box with a clip rect */
if (css_rect.left_auto == false)
r.x0 = x - border_left + FIXTOINT(nscss_len2px(
css_rect.left, css_rect.lunit,
box->style));
if (css_rect.top_auto == false)
r.y0 = y - border_top + FIXTOINT(nscss_len2px(
css_rect.top, css_rect.tunit,
box->style));
if (css_rect.right_auto == false)
r.x1 = x - border_left + FIXTOINT(nscss_len2px(
css_rect.right, css_rect.runit,
box->style));
if (css_rect.bottom_auto == false)
r.y1 = y - border_top + FIXTOINT(nscss_len2px(
css_rect.bottom, css_rect.bunit,
box->style));
/* find intersection of clip rectangle and box */
if (r.x0 < clip->x0) r.x0 = clip->x0;
if (r.y0 < clip->y0) r.y0 = clip->y0;
if (clip->x1 < r.x1) r.x1 = clip->x1;
if (clip->y1 < r.y1) r.y1 = clip->y1;
/* no point trying to draw 0-width/height boxes */
if (r.x0 == r.x1 || r.y0 == r.y1)
/* not an error */
return ((!plot->group_end) || (plot->group_end()));
/* clip to it */
if (!plot->clip(&r))
return false;
} else if (box->type == BOX_BLOCK || box->type == BOX_INLINE_BLOCK ||
box->type == BOX_TABLE_CELL || box->object) {
/* find intersection of clip rectangle and box */
if (r.x0 < clip->x0) r.x0 = clip->x0;