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Handle percentages from libcss without doing floating point maths.

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svn path=/trunk/netsurf/; revision=11687
This commit is contained in:
Michael Drake 2011-02-15 14:31:18 +00:00
parent 3407760e64
commit f793d17acd
1 changed files with 41 additions and 40 deletions
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81
render/layout.c
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@ -58,6 +58,9 @@
#define AUTO INT_MIN
/* Fixed point value percentage of an integer, to an integer */
#define FPCT_OF_INT_TOINT(a, b) FIXTOINT(FDIVI(FMULI(a, b), 100))
static bool layout_block_context(struct box *block, int viewport_height,
struct content *content);
@ -961,16 +964,16 @@ bool layout_apply_minmax_height(struct box *box, struct box *container)
if (box->style) {
enum css_height_e htype = CSS_HEIGHT_AUTO;
css_fixed length = 0;
css_fixed value = 0;
css_unit unit = CSS_UNIT_PX;
if (containing_block) {
htype = css_computed_height(containing_block->style,
&length, &unit);
&value, &unit);
}
/* max-height */
if (css_computed_max_height(box->style, &length, &unit) ==
if (css_computed_max_height(box->style, &value, &unit) ==
CSS_MAX_HEIGHT_SET) {
if (unit == CSS_UNIT_PCT) {
if (containing_block &&
@ -982,15 +985,15 @@ bool layout_apply_minmax_height(struct box *box, struct box *container)
* containing block has a valid
* specified height. (CSS 2.1
* Section 10.5) */
h = FIXTOFLT(length) *
containing_block->height / 100;
h = FPCT_OF_INT_TOINT(value,
containing_block->height);
if (h < box->height) {
box->height = h;
updated = true;
}
}
} else {
h = FIXTOINT(nscss_len2px(length, unit,
h = FIXTOINT(nscss_len2px(value, unit,
box->style));
if (h < box->height) {
box->height = h;
@ -1000,7 +1003,7 @@ bool layout_apply_minmax_height(struct box *box, struct box *container)
}
/* min-height */
if (css_computed_min_height(box->style, &length, &unit) ==
if (css_computed_min_height(box->style, &value, &unit) ==
CSS_MIN_HEIGHT_SET) {
if (unit == CSS_UNIT_PCT) {
if (containing_block &&
@ -1012,15 +1015,15 @@ bool layout_apply_minmax_height(struct box *box, struct box *container)
* containing block has a valid
* specified height. (CSS 2.1
* Section 10.5) */
h = FIXTOFLT(length) *
containing_block->height / 100;
h = FPCT_OF_INT_TOINT(value,
containing_block->height);
if (h > box->height) {
box->height = h;
updated = true;
}
}
} else {
h = FIXTOINT(nscss_len2px(length, unit,
h = FIXTOINT(nscss_len2px(value, unit,
box->style));
if (h > box->height) {
box->height = h;
@ -1430,16 +1433,15 @@ void layout_find_dimensions(int available_width, int viewport_height,
* containing block has a valid
* specified height.
* (CSS 2.1 Section 10.5) */
*height = FIXTOFLT(value) *
containing_block->height /
100;
*height = FPCT_OF_INT_TOINT(value,
containing_block->height);
} else if ((!box->parent ||
!box->parent->parent) &&
viewport_height >= 0) {
/* If root element or it's child
* (HTML or BODY) */
*height = FIXTOFLT(value) *
viewport_height / 100;
*height = FPCT_OF_INT_TOINT(value,
viewport_height);
} else {
/* precentage height not permissible
* treat height as auto */
@ -1472,8 +1474,8 @@ void layout_find_dimensions(int available_width, int viewport_height,
if (type == CSS_MAX_WIDTH_SET) {
if (unit == CSS_UNIT_PCT) {
*max_width = (FIXTOFLT(value) *
available_width) / 100;
*max_width = FPCT_OF_INT_TOINT(value,
available_width);
} else {
*max_width = FIXTOINT(nscss_len2px(value, unit,
style));
@ -1502,8 +1504,8 @@ void layout_find_dimensions(int available_width, int viewport_height,
if (type == CSS_MIN_WIDTH_SET) {
if (unit == CSS_UNIT_PCT) {
*min_width = (FIXTOFLT(value) *
available_width) / 100;
*min_width = FPCT_OF_INT_TOINT(value,
available_width);
} else {
*min_width = FIXTOINT(nscss_len2px(value, unit,
style));
@ -1550,8 +1552,8 @@ void layout_find_dimensions(int available_width, int viewport_height,
if (type == CSS_MARGIN_SET) {
if (unit == CSS_UNIT_PCT) {
margin[i] = available_width *
FIXTOFLT(value) / 100;
margin[i] = FPCT_OF_INT_TOINT(value,
available_width);
} else {
margin[i] = FIXTOINT(nscss_len2px(value,
unit, style));
@ -1583,8 +1585,8 @@ void layout_find_dimensions(int available_width, int viewport_height,
}
if (unit == CSS_UNIT_PCT) {
padding[i] = available_width *
FIXTOFLT(value) / 100;
padding[i] = FPCT_OF_INT_TOINT(value,
available_width);
} else {
padding[i] = FIXTOINT(nscss_len2px(value, unit,
style));
@ -2117,7 +2119,7 @@ bool layout_line(struct box *first, int *width, int *y,
wtype = css_computed_width(b->style, &value, &unit);
if (wtype == CSS_WIDTH_SET) {
if (unit == CSS_UNIT_PCT) {
b->width = *width * FIXTOFLT(value) / 100;
b->width = FPCT_OF_INT_TOINT(value, *width);
} else {
b->width = FIXTOINT(nscss_len2px(value, unit,
b->style));
@ -2775,7 +2777,7 @@ struct box *layout_minmax_line(struct box *first,
if (wtype == CSS_WIDTH_SET) {
if (unit == CSS_UNIT_PCT) {
/*
b->width = width * FIXTOFLT(value) / 100
b->width = FPCT_OF_INT_TOINT(value, width);
*/
width = AUTO;
@ -2849,7 +2851,7 @@ int layout_text_indent(const css_computed_style *style, int width)
css_computed_text_indent(style, &value, &unit);
if (unit == CSS_UNIT_PCT) {
return width * FIXTOFLT(value) / 100;
return FPCT_OF_INT_TOINT(value, width);
} else {
return FIXTOINT(nscss_len2px(value, unit, style));
}
@ -3032,8 +3034,7 @@ bool layout_table(struct box *table, int available_width,
wtype = css_computed_width(style, &value, &unit);
if (wtype == CSS_WIDTH_SET) {
if (unit == CSS_UNIT_PCT) {
table_width = ceil(available_width *
FIXTOFLT(value) / 100);
table_width = FPCT_OF_INT_TOINT(value, available_width);
} else {
table_width =
FIXTOINT(nscss_len2px(value, unit, style));
@ -3108,8 +3109,8 @@ bool layout_table(struct box *table, int available_width,
/* Table is absolutely positioned or its
* containing block has a valid specified
* height. (CSS 2.1 Section 10.5) */
min_height = FIXTOFLT(value) *
containing_block->height / 100;
min_height = FPCT_OF_INT_TOINT(value,
containing_block->height);
}
} else {
/* This is the minimum height for the table
@ -3720,7 +3721,7 @@ void calculate_mbp_width(const css_computed_style *style, unsigned int side,
type = margin_funcs[side](style, &value, &unit);
if (type == CSS_MARGIN_SET) {
if (unit == CSS_UNIT_PCT) {
*frac += FIXTOFLT(value) * 0.01;
*frac += FIXTOINT(FDIVI(value, 100));
} else {
*fixed += FIXTOINT(nscss_len2px(value, unit,
style));
@ -3742,7 +3743,7 @@ void calculate_mbp_width(const css_computed_style *style, unsigned int side,
if (padding) {
padding_funcs[side](style, &value, &unit);
if (unit == CSS_UNIT_PCT) {
*frac += FIXTOFLT(value) * 0.01;
*frac += FIXTOINT(FDIVI(value, 100));
} else {
*fixed += FIXTOINT(nscss_len2px(value, unit, style));
}
@ -4433,8 +4434,8 @@ void layout_compute_offsets(struct box *box,
type = css_computed_left(box->style, &value, &unit);
if (type == CSS_LEFT_SET) {
if (unit == CSS_UNIT_PCT) {
*left = (FIXTOFLT(value) *
containing_block->width) / 100;
*left = FPCT_OF_INT_TOINT(value,
containing_block->width);
} else {
*left = FIXTOINT(nscss_len2px(value, unit, box->style));
}
@ -4446,8 +4447,8 @@ void layout_compute_offsets(struct box *box,
type = css_computed_right(box->style, &value, &unit);
if (type == CSS_RIGHT_SET) {
if (unit == CSS_UNIT_PCT) {
*right = (FIXTOFLT(value) *
containing_block->width) / 100;
*right = FPCT_OF_INT_TOINT(value,
containing_block->width);
} else {
*right = FIXTOINT(nscss_len2px(value, unit,
box->style));
@ -4460,8 +4461,8 @@ void layout_compute_offsets(struct box *box,
type = css_computed_top(box->style, &value, &unit);
if (type == CSS_TOP_SET) {
if (unit == CSS_UNIT_PCT) {
*top = (FIXTOFLT(value) *
containing_block->height) / 100;
*top = FPCT_OF_INT_TOINT(value,
containing_block->height);
} else {
*top = FIXTOINT(nscss_len2px(value, unit, box->style));
}
@ -4473,8 +4474,8 @@ void layout_compute_offsets(struct box *box,
type = css_computed_bottom(box->style, &value, &unit);
if (type == CSS_BOTTOM_SET) {
if (unit == CSS_UNIT_PCT) {
*bottom = (FIXTOFLT(value) *
containing_block->height) / 100;
*bottom = FPCT_OF_INT_TOINT(value,
containing_block->height);
} else {
*bottom = FIXTOINT(nscss_len2px(value, unit,
box->style));