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Fix box scrollbars to accurately represent ratio of visible area's length to full area's length, in the length of the scroll bar slider.

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svn path=/trunk/netsurf/; revision=12364
This commit is contained in:
Michael Drake 2011-05-10 10:41:57 +00:00
parent ac447fc293
commit 523e77e38d
1 changed files with 32 additions and 29 deletions
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61
render/box.c
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@ -1005,28 +1005,38 @@ bool box_handle_scrollbars(struct browser_window *bw, struct box *box,
bool bottom, bool right)
{
struct browser_scrollbar_data *data;
int padding_width, padding_height;
padding_width = box->width + box->padding[RIGHT] + box->padding[LEFT];
padding_height = box->height + box->padding[TOP] + box->padding[BOTTOM];
int visible_width, visible_height;
int full_width, full_height;
if (!bottom && box->scroll_x != NULL) {
data = scrollbar_get_data(box->scroll_x);
scrollbar_destroy(box->scroll_x);
free(data);
box->scroll_x = NULL;
}
if (!right && box->scroll_y != NULL) {
data = scrollbar_get_data(box->scroll_y);
scrollbar_destroy(box->scroll_y);
free(data);
box->scroll_y = NULL;
}
if (!bottom && !right)
return true;
visible_width = box->width + box->padding[RIGHT] + box->padding[LEFT];
visible_height = box->height + box->padding[TOP] + box->padding[BOTTOM];
full_width = ((box->descendant_x1 - box->border[RIGHT].width) >
visible_width) ?
box->descendant_x1 + box->padding[RIGHT] :
visible_width;
full_height = ((box->descendant_y1 - box->border[BOTTOM].width) >
visible_height) ?
box->descendant_y1 + box->padding[BOTTOM] :
visible_height;
if (right) {
if (box->scroll_y == NULL) {
data = malloc(sizeof(struct browser_scrollbar_data));
@ -1037,19 +1047,15 @@ bool box_handle_scrollbars(struct browser_window *bw, struct box *box,
}
data->bw = bw;
data->box = box;
if (!scrollbar_create(false,
padding_height,
box->descendant_y1 - box->padding[TOP],
box->height,
data,
html_overflow_scroll_callback,
if (!scrollbar_create(false, visible_height,
full_height, visible_height,
data, html_overflow_scroll_callback,
&(box->scroll_y)))
return false;
} else
scrollbar_set_extents(box->scroll_y,
padding_height, box->height,
box->descendant_y1 -
box->padding[TOP]);
} else {
scrollbar_set_extents(box->scroll_y, visible_height,
visible_height, full_height);
}
}
if (bottom) {
if (box->scroll_x == NULL) {
@ -1062,21 +1068,18 @@ bool box_handle_scrollbars(struct browser_window *bw, struct box *box,
data->bw = bw;
data->box = box;
if (!scrollbar_create(true,
padding_width -
visible_width -
(right ? SCROLLBAR_WIDTH : 0),
box->descendant_x1 - box->padding[LEFT],
box->width,
data,
html_overflow_scroll_callback,
full_width, visible_width,
data, html_overflow_scroll_callback,
&box->scroll_x))
return false;
} else
} else {
scrollbar_set_extents(box->scroll_x,
padding_width -
visible_width -
(right ? SCROLLBAR_WIDTH : 0),
box->width,
box->descendant_x1 -
box->padding[LEFT]);
visible_width, full_width);
}
}
if (right && bottom)