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Implement min-width and max-width properties for non-replaced elements. Partially implemented for replaced elements.

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svn path=/trunk/netsurf/; revision=5445
This commit is contained in:
Michael Drake 2008-09-27 20:19:46 +00:00
parent c35fc63599
commit 1a00aa03a5
1 changed files with 200 additions and 78 deletions
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278
render/layout.c
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@ -62,13 +62,13 @@ static bool layout_block_object(struct box *block);
static void layout_block_find_dimensions(int available_width, struct box *box);
static bool layout_apply_minmax_height(struct box *box);
static void layout_block_add_scrollbar(struct box *box, int which);
static int layout_solve_width(int available_width, int width,
int margin[4], int padding[4], int border[4]);
static int layout_solve_width(int available_width, int width, int max_width,
int min_width, int margin[4], int padding[4], int border[4]);
static void layout_float_find_dimensions(int available_width,
struct css_style *style, struct box *box);
static void layout_find_dimensions(int available_width,
struct box *box, struct css_style *style,
int *width, int *height,
int *width, int *height, int *max_width, int *min_width,
int margin[4], int padding[4], int border[4]);
static int layout_clear(struct box *fl, css_clear clear);
static void find_sides(struct box *fl, int y0, int y1,
@ -322,7 +322,8 @@ bool layout_block_context(struct box *block, struct content *content)
if (!layout_table(box, box->parent->width, content))
return false;
layout_solve_width(box->parent->width, box->width,
box->margin, box->padding, box->border);
-1, -1, box->margin, box->padding,
box->border);
}
/* Position box: horizontal. */
@ -534,7 +535,8 @@ bool layout_block_context(struct box *block, struct content *content)
* 0 <= block->min_width <= block->max_width
*/
void layout_minmax_block(struct box *block, const struct font_functions *font_func)
void layout_minmax_block(struct box *block,
const struct font_functions *font_func)
{
struct box *child;
int min = 0, max = 0;
@ -678,20 +680,21 @@ bool layout_block_object(struct box *block)
void layout_block_find_dimensions(int available_width, struct box *box)
{
int width, height;
int width, max_width, min_width;
int height;
int *margin = box->margin;
int *padding = box->padding;
int *border = box->border;
struct css_style *style = box->style;
layout_find_dimensions(available_width, box, style,
&width, &height, margin, padding, border);
layout_find_dimensions(available_width, box, style, &width, &height,
&max_width, &min_width, margin, padding, border);
if (box->object && box->object->type != CONTENT_HTML) {
/* block-level replaced element, see 10.3.4 and 10.6.2 */
if (width == AUTO && height == AUTO) {
width = box->object->width;
height = box->object->height;
width = box->object->width;
} else if (width == AUTO) {
if (box->object->height)
width = box->object->width *
@ -709,8 +712,8 @@ void layout_block_find_dimensions(int available_width, struct box *box)
}
}
box->width = layout_solve_width(available_width, width, margin,
padding, border);
box->width = layout_solve_width(available_width, width,
max_width, min_width, margin, padding, border);
box->height = height;
if (margin[TOP] == AUTO)
@ -796,6 +799,8 @@ void layout_block_add_scrollbar(struct box *box, int which)
*
* \param available_width Max width available in pixels
* \param width Current box width
* \param max_width Box max-width ( -ve means no max-width to apply)
* \param min_width Box min-width ( <=0 means no min-width to apply)
* \param margin[4] Current box margins. Updated with new box
* left / right margins
* \param padding[4] Current box paddings. Updated with new box
@ -805,19 +810,34 @@ void layout_block_add_scrollbar(struct box *box, int which)
* \return New box width
*/
int layout_solve_width(int available_width, int width,
int margin[4], int padding[4], int border[4])
int layout_solve_width(int available_width, int width, int max_width,
int min_width, int margin[4], int padding[4], int border[4])
{
bool auto_width = false;
/* Find width */
if (width == AUTO) {
/* any other 'auto' become 0 */
if (margin[LEFT] == AUTO)
margin[LEFT] = 0;
if (margin[RIGHT] == AUTO)
margin[RIGHT] = 0;
if (margin[LEFT] == AUTO) margin[LEFT] = 0;
if (margin[RIGHT] == AUTO) margin[RIGHT] = 0;
width = available_width -
(margin[LEFT] + border[LEFT] + padding[LEFT] +
padding[RIGHT] + border[RIGHT] + margin[RIGHT]);
} else if (margin[LEFT] == AUTO && margin[RIGHT] == AUTO) {
auto_width = true;
}
if (max_width >= 0 && width > max_width) {
/* max-width is admissable and width exceeds max-width */
width = max_width;
auto_width = false;
}
if (min_width > 0 && width < min_width) {
/* min-width is admissable and width is less than max-width */
width = min_width;
auto_width = false;
}
if (!auto_width && margin[LEFT] == AUTO && margin[RIGHT] == AUTO) {
/* make the margins equal, centering the element */
margin[LEFT] = margin[RIGHT] = (available_width -
(border[LEFT] + padding[LEFT] + width +
@ -826,11 +846,11 @@ int layout_solve_width(int available_width, int width,
margin[RIGHT] += margin[LEFT];
margin[LEFT] = 0;
}
} else if (margin[LEFT] == AUTO) {
} else if (!auto_width && margin[LEFT] == AUTO) {
margin[LEFT] = available_width -
(border[LEFT] + padding[LEFT] + width +
padding[RIGHT] + border[RIGHT] + margin[RIGHT]);
} else {
} else if (!auto_width) {
/* margin-right auto or "over-constrained" */
margin[RIGHT] = available_width -
(margin[LEFT] + border[LEFT] + padding[LEFT] +
@ -849,7 +869,7 @@ int layout_solve_width(int available_width, int width,
void layout_float_find_dimensions(int available_width,
struct css_style *style, struct box *box)
{
int width, height;
int width, height, max_width, min_width;
int *margin = box->margin;
int *padding = box->padding;
int *border = box->border;
@ -857,8 +877,8 @@ void layout_float_find_dimensions(int available_width,
style->overflow == CSS_OVERFLOW_AUTO) ?
SCROLLBAR_WIDTH : 0;
layout_find_dimensions(available_width, box, style,
&width, &height, margin, padding, border);
layout_find_dimensions(available_width, box, style, &width, &height,
&max_width, &min_width, margin, padding, border);
if (margin[LEFT] == AUTO)
margin[LEFT] = 0;
@ -922,6 +942,10 @@ void layout_float_find_dimensions(int available_width,
width -= box->margin[LEFT] + box->border[LEFT] +
box->padding[LEFT] + box->padding[RIGHT] +
box->border[RIGHT] + box->margin[RIGHT];
if (max_width >= 0 && width > max_width) width = max_width;
if (min_width > 0 && width < min_width) width = min_width;
} else {
width -= scrollbar_width;
}
@ -945,6 +969,8 @@ void layout_float_find_dimensions(int available_width,
* and borders
* \param width updated to width, may be NULL
* \param height updated to height, may be NULL
* \param max_width updated to max-width, may be NULL
* \param min_width updated to min-width, may be NULL
* \param margin[4] filled with margins, may be NULL
* \param padding[4] filled with paddings
* \param border[4] filled with border widths
@ -952,7 +978,7 @@ void layout_float_find_dimensions(int available_width,
void layout_find_dimensions(int available_width,
struct box *box, struct css_style *style,
int *width, int *height,
int *width, int *height, int *max_width, int *min_width,
int margin[4], int padding[4], int border[4])
{
unsigned int i;
@ -966,9 +992,8 @@ void layout_find_dimensions(int available_width,
style);
break;
case CSS_WIDTH_PERCENT:
/* Round to nearest pixel */
*width = (style->width.value.percent *
available_width + 50) / 100;
available_width) / 100;
/* gadget widths include margins,
* borders and padding */
if (box->gadget) {
@ -1001,6 +1026,63 @@ void layout_find_dimensions(int available_width,
}
}
if (max_width) {
switch (style->max_width.max_width) {
case CSS_MAX_WIDTH_LENGTH:
*max_width = css_len2px(&style->max_width.value.
length, style);
break;
case CSS_MAX_WIDTH_PERCENT:
*max_width = (style->max_width.value.percent *
available_width) / 100;
/* gadget widths include margins,
* borders and padding */
if (box->gadget) {
calculate_mbp_width(style,
LEFT, &fixed, &frac);
calculate_mbp_width(style,
RIGHT, &fixed, &frac);
*max_width -= frac + fixed;
*max_width = *max_width > 0 ?
*max_width : 0;
}
break;
case CSS_MAX_WIDTH_NONE:
default:
/* Inadmissible */
*max_width = -1;
break;
}
}
if (min_width) {
switch (style->min_width.min_width) {
case CSS_MIN_WIDTH_LENGTH:
*min_width = css_len2px(&style->min_width.value.
length, style);
break;
case CSS_MIN_WIDTH_PERCENT:
*min_width = (style->min_width.value.percent *
available_width) / 100;
/* gadget widths include margins,
* borders and padding */
if (box->gadget) {
calculate_mbp_width(style,
LEFT, &fixed, &frac);
calculate_mbp_width(style,
RIGHT, &fixed, &frac);
*min_width -= frac + fixed;
*min_width = *min_width > 0 ?
*min_width : 0;
}
break;
default:
/* Inadmissible */
*min_width = 0;
break;
}
}
for (i = 0; i != 4; i++) {
if (margin) {
switch (style->margin[i].margin) {
@ -1354,7 +1436,7 @@ bool layout_line(struct box *first, int *width, int *y,
if (b->type == BOX_INLINE) {
/* calculate borders, margins, and padding */
layout_find_dimensions(*width, b, b->style,
layout_find_dimensions(*width, b, b->style, 0, 0,
0, 0, b->margin, b->padding, b->border);
for (i = 0; i != 4; i++)
if (b->margin[i] == AUTO)
@ -2227,7 +2309,7 @@ bool layout_table(struct box *table, int available_width,
memcpy(col, table->col, sizeof(col[0]) * columns);
/* find margins, paddings, and borders for table and cells */
layout_find_dimensions(available_width, table, style, 0, 0,
layout_find_dimensions(available_width, table, style, 0, 0, 0, 0,
table->margin, table->padding, table->border);
for (row_group = table->children; row_group;
row_group = row_group->next) {
@ -2235,7 +2317,7 @@ bool layout_table(struct box *table, int available_width,
for (c = row->children; c; c = c->next) {
assert(c->style);
layout_find_dimensions(available_width,
c, c->style, 0, 0, 0,
c, c->style, 0, 0, 0, 0, 0,
c->padding, c->border);
if (c->style->overflow ==
CSS_OVERFLOW_SCROLL ||
@ -3090,7 +3172,7 @@ bool layout_absolute(struct box *box, struct box *containing_block,
{
int static_left, static_top; /* static position */
int top, right, bottom, left;
int width, height;
int width, height, max_width, min_width;
int *margin = box->margin;
int *padding = box->padding;
int *border = box->border;
@ -3124,7 +3206,8 @@ bool layout_absolute(struct box *box, struct box *containing_block,
&top, &right, &bottom, &left);
layout_find_dimensions(available_width, box, box->style,
&width, &height, margin, padding, border);
&width, &height, &max_width, &min_width,
margin, padding, border);
/* 10.3.7 */
LOG(("%i + %i + %i + %i + %i + %i + %i + %i + %i = %i",
@ -3138,24 +3221,32 @@ bool layout_absolute(struct box *box, struct box *containing_block,
margin[RIGHT] = 0;
left = static_left;
width = min(max(box->min_width, available_width), box->max_width);
width = min(max(box->min_width, available_width),
box->max_width);
width -= box->margin[LEFT] + box->border[LEFT] +
box->padding[LEFT] + box->padding[RIGHT] +
box->border[RIGHT] + box->margin[RIGHT];
/* Adjust for {min|max}-width */
if (max_width >= 0 && width > max_width) width = max_width;
if (min_width > 0 && width < min_width) width = min_width;
right = containing_block->width -
left -
margin[LEFT] - border[LEFT] - padding[LEFT] -
width -
padding[RIGHT] - border[RIGHT] - margin[RIGHT];
} else if (left != AUTO && width != AUTO && right != AUTO) {
/* Adjust for {min|max}-width */
if (max_width >= 0 && width > max_width) width = max_width;
if (min_width > 0 && width < min_width) width = min_width;
if (margin[LEFT] == AUTO && margin[RIGHT] == AUTO) {
space = containing_block->width -
left -
border[LEFT] - padding[LEFT] -
width -
padding[RIGHT] - border[RIGHT] -
right;
left - border[LEFT] -
padding[LEFT] - width - padding[RIGHT] -
border[RIGHT] - right;
if (space < 0) {
margin[LEFT] = 0;
margin[RIGHT] = space;
@ -3164,24 +3255,19 @@ bool layout_absolute(struct box *box, struct box *containing_block,
}
} else if (margin[LEFT] == AUTO) {
margin[LEFT] = containing_block->width -
left -
border[LEFT] - padding[LEFT] -
width -
padding[RIGHT] - border[RIGHT] - margin[RIGHT] -
right;
left - border[LEFT] -
padding[LEFT] - width - padding[RIGHT] -
border[RIGHT] - margin[RIGHT] - right;
} else if (margin[RIGHT] == AUTO) {
margin[RIGHT] = containing_block->width -
left -
margin[LEFT] - border[LEFT] - padding[LEFT] -
width -
padding[RIGHT] - border[RIGHT] -
right;
left - margin[LEFT] - border[LEFT] -
padding[LEFT] - width - padding[RIGHT] -
border[RIGHT] - right;
} else {
right = containing_block->width -
left -
margin[LEFT] - border[LEFT] - padding[LEFT] -
width -
padding[RIGHT] - border[RIGHT] - margin[RIGHT];
left - margin[LEFT] - border[LEFT] -
padding[LEFT] - width - padding[RIGHT] -
border[RIGHT] - margin[RIGHT];
}
} else {
if (margin[LEFT] == AUTO)
@ -3192,54 +3278,90 @@ bool layout_absolute(struct box *box, struct box *containing_block,
if (left == AUTO && width == AUTO && right != AUTO) {
available_width -= right;
width = min(max(box->min_width, available_width), box->max_width);
width = min(max(box->min_width, available_width),
box->max_width);
width -= box->margin[LEFT] + box->border[LEFT] +
box->padding[LEFT] + box->padding[RIGHT] +
box->border[RIGHT] + box->margin[RIGHT];
/* Adjust for {min|max}-width */
if (max_width >= 0 && width > max_width)
width = max_width;
if (min_width > 0 && width < min_width)
width = min_width;
left = containing_block->width -
margin[LEFT] - border[LEFT] - padding[LEFT] -
width -
padding[RIGHT] - border[RIGHT] - margin[RIGHT] -
right;
margin[LEFT] - border[LEFT] -
padding[LEFT] - width - padding[RIGHT] -
border[RIGHT] - margin[RIGHT] - right;
} else if (left == AUTO && width != AUTO && right == AUTO) {
/* Adjust for {min|max}-width */
if (max_width >= 0 && width > max_width)
width = max_width;
if (min_width > 0 && width < min_width)
width = min_width;
left = static_left;
right = containing_block->width -
left -
margin[LEFT] - border[LEFT] - padding[LEFT] -
width -
padding[RIGHT] - border[RIGHT] - margin[RIGHT];
left - margin[LEFT] - border[LEFT] -
padding[LEFT] - width - padding[RIGHT] -
border[RIGHT] - margin[RIGHT];
} else if (left != AUTO && width == AUTO && right == AUTO) {
available_width -= left;
width = min(max(box->min_width, available_width), box->max_width);
width = min(max(box->min_width, available_width),
box->max_width);
width -= box->margin[LEFT] + box->border[LEFT] +
box->padding[LEFT] + box->padding[RIGHT] +
box->border[RIGHT] + box->margin[RIGHT];
/* Adjust for {min|max}-width */
if (max_width >= 0 && width > max_width)
width = max_width;
if (min_width > 0 && width < min_width)
width = min_width;
right = containing_block->width -
left -
margin[LEFT] - border[LEFT] - padding[LEFT] -
width -
padding[RIGHT] - border[RIGHT] - margin[RIGHT];
left - margin[LEFT] - border[LEFT] -
padding[LEFT] - width - padding[RIGHT] -
border[RIGHT] - margin[RIGHT];
} else if (left == AUTO && width != AUTO && right != AUTO) {
/* Adjust for {min|max}-width */
if (max_width >= 0 && width > max_width)
width = max_width;
if (min_width > 0 && width < min_width)
width = min_width;
left = containing_block->width -
margin[LEFT] - border[LEFT] - padding[LEFT] -
width -
padding[RIGHT] - border[RIGHT] - margin[RIGHT] -
right;
margin[LEFT] - border[LEFT] -
padding[LEFT] - width - padding[RIGHT] -
border[RIGHT] - margin[RIGHT] - right;
} else if (left != AUTO && width == AUTO && right != AUTO) {
width = containing_block->width -
left -
margin[LEFT] - border[LEFT] - padding[LEFT] -
padding[RIGHT] - border[RIGHT] - margin[RIGHT] -
right;
left - margin[LEFT] - border[LEFT] -
padding[LEFT] - padding[RIGHT] -
border[RIGHT] - margin[RIGHT] - right;
/* Adjust for {min|max}-width */
if (max_width >= 0 && width > max_width)
width = max_width;
if (min_width > 0 && width < min_width)
width = min_width;
} else if (left != AUTO && width != AUTO && right == AUTO) {
/* Adjust for {min|max}-width */
if (max_width >= 0 && width > max_width)
width = max_width;
if (min_width > 0 && width < min_width)
width = min_width;
right = containing_block->width -
left -
margin[LEFT] - border[LEFT] - padding[LEFT] -
width -
padding[RIGHT] - border[RIGHT] - margin[RIGHT];
left - margin[LEFT] - border[LEFT] -
padding[LEFT] - width - padding[RIGHT] -
border[RIGHT] - margin[RIGHT];
}
}
LOG(("%i + %i + %i + %i + %i + %i + %i + %i + %i = %i",
@ -3268,7 +3390,7 @@ bool layout_absolute(struct box *box, struct box *containing_block,
/* \todo layout_table considers margins etc. again */
if (!layout_table(box, width, content))
return false;
layout_solve_width(box->parent->width, box->width,
layout_solve_width(box->parent->width, box->width, -1, -1,
box->margin, box->padding, box->border);
}