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[project @ 2004-05-27 22:13:20 by bursa]

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Fix some table layout bugs related to the recent changes to calculate_table_widths().

svn path=/import/netsurf/; revision=898
This commit is contained in:
James Bursa 2004-05-27 22:13:20 +00:00
parent 2af77b03e5
commit 4f31db54f7
2 changed files with 93 additions and 76 deletions
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31
render/box.h
View File

@ -82,6 +82,11 @@
#include "netsurf/utils/pool.h"
struct box;
struct column;
/** Type of a struct box. */
typedef enum {
BOX_BLOCK, BOX_INLINE_CONTAINER, BOX_INLINE,
BOX_TABLE, BOX_TABLE_ROW, BOX_TABLE_CELL,
@ -90,15 +95,6 @@ typedef enum {
BOX_INLINE_BLOCK, BOX_BR
} box_type;
struct column {
enum { COLUMN_WIDTH_UNKNOWN = 0, COLUMN_WIDTH_FIXED,
COLUMN_WIDTH_AUTO, COLUMN_WIDTH_PERCENT,
COLUMN_WIDTH_RELATIVE } type;
int min, max, width;
};
struct box;
/* parameters for <object> and related elements */
struct object_params {
char* data;
@ -184,7 +180,7 @@ struct box {
/** Next sibling float box. */
struct box *next_float;
struct column *col; /**< Table column data for TABLE only. */
struct column *col; /**< Array of table column data for TABLE only. */
struct font_data *font; /**< Font, or 0 if no text. */
@ -201,6 +197,21 @@ struct box {
void *object_state;
};
/** Table column data. */
struct column {
/** Type of column. */
enum { COLUMN_WIDTH_UNKNOWN, COLUMN_WIDTH_FIXED,
COLUMN_WIDTH_AUTO, COLUMN_WIDTH_PERCENT,
COLUMN_WIDTH_RELATIVE } type;
/** Preferred width of column. Pixels for FIXED, percentage for PERCENT,
* relative units for RELATIVE, unused for AUTO. */
int width;
/** Minimum width of content. */
int min;
/** Maximum width of content. */
int max;
};
#define UNKNOWN_WIDTH INT_MAX
#define UNKNOWN_MAX_WIDTH INT_MAX

138
render/layout.c
View File

@ -1149,9 +1149,13 @@ void layout_table(struct box *table, int available_width)
}
for (i = 0; i != columns; i++) {
if (col[i].type == COLUMN_WIDTH_FIXED)
if (col[i].type == COLUMN_WIDTH_FIXED) {
if (col[i].width < col[i].min)
col[i].width = col[i].max = col[i].min;
else
col[i].min = col[i].max = col[i].width;
required_width += col[i].width;
else if (col[i].type == COLUMN_WIDTH_PERCENT) {
} else if (col[i].type == COLUMN_WIDTH_PERCENT) {
int width = col[i].width * auto_width / 100;
required_width += col[i].min < width ? width : col[i].min;
} else
@ -1574,6 +1578,17 @@ void calculate_inline_widths(struct box *box, int *min, int *line_max)
/**
* Find min, max widths for a table and determine column width types.
*
* \param table table box to calculate widths
*
* If table->max_width is not UNKNOWN_MAX_WIDTH, returns with no change to table.
*
* If table->col is 0, it is created and filled in completely.
*
* If table->col exists, the type and width fields are left unchanged, and the min
* and max fields are updated.
*
* table->min_width and table->max_width are set.
*/
void calculate_table_widths(struct box *table)
@ -1589,20 +1604,27 @@ void calculate_table_widths(struct box *table)
if (table->max_width != UNKNOWN_MAX_WIDTH)
return;
if (!table->col)
table->col = xcalloc(table->columns, sizeof(*col));
if (!table->col) {
col = table->col = malloc(table->columns * sizeof *col);
assert(col);
for (i = 0; i != table->columns; i++)
col[i].type = COLUMN_WIDTH_UNKNOWN;
}
col = table->col;
for (i = 0; i != table->columns; i++)
col[i].min = col[i].max = 0;
assert(table->children != 0 && table->children->children != 0);
assert(table->children && table->children->children);
/* 1st pass: consider cells with colspan 1 only */
for (row_group = table->children; row_group != 0; row_group = row_group->next) {
for (row_group = table->children; row_group;
row_group = row_group->next) {
assert(row_group->type == BOX_TABLE_ROW_GROUP);
for (row = row_group->children; row != 0; row = row->next) {
for (row = row_group->children; row; row = row->next) {
assert(row->type == BOX_TABLE_ROW);
for (cell = row->children; cell != 0; cell = cell->next) {
for (cell = row->children; cell; cell = cell->next) {
assert(cell->type == BOX_TABLE_CELL);
assert(cell->style != 0);
assert(cell->style);
if (cell->columns != 1)
continue;
@ -1610,48 +1632,48 @@ void calculate_table_widths(struct box *table)
calculate_widths(cell);
i = cell->start_column;
if (col[i].type == COLUMN_WIDTH_FIXED) {
if (col[i].width < cell->min_width)
col[i].min = col[i].width = col[i].max = cell->min_width;
continue;
}
/* update column min, max widths using cell widths */
/* update column min, max widths
* using cell widths */
if (col[i].min < cell->min_width)
col[i].min = cell->min_width;
if (col[i].max < cell->max_width)
col[i].max = cell->max_width;
/* fixed width takes priority over any
* other width type */
if (col[i].type != COLUMN_WIDTH_FIXED &&
cell->style->width.width == CSS_WIDTH_LENGTH) {
/* fixed width cell => fixed width column */
cell->style->width.width ==
CSS_WIDTH_LENGTH) {
col[i].type = COLUMN_WIDTH_FIXED;
width = len(&cell->style->width.value.length,
col[i].width = len(&cell->style->
width.value.length,
cell->style);
if (width < col[i].min)
/* if the given width is too small, give
* the column its minimum width */
width = col[i].min;
col[i].min = col[i].width = col[i].max = width;
} else if (col[i].type == COLUMN_WIDTH_UNKNOWN) {
if (cell->style->width.width == CSS_WIDTH_PERCENT) {
col[i].type = COLUMN_WIDTH_PERCENT;
col[i].width = cell->style->width.value.percent;
} else if (cell->style->width.width == CSS_WIDTH_AUTO) {
col[i].type = COLUMN_WIDTH_AUTO;
continue;
}
if (col[i].type != COLUMN_WIDTH_UNKNOWN)
continue;
if (cell->style->width.width ==
CSS_WIDTH_PERCENT) {
col[i].type = COLUMN_WIDTH_PERCENT;
col[i].width = cell->style->
width.value.percent;
} else if (cell->style->width.width ==
CSS_WIDTH_AUTO) {
col[i].type = COLUMN_WIDTH_AUTO;
}
}
}
}
/* 2nd pass: cells which span multiple columns */
for (row_group = table->children; row_group != 0; row_group = row_group->next) {
for (row = row_group->children; row != 0; row = row->next) {
for (cell = row->children; cell != 0; cell = cell->next) {
for (row_group = table->children; row_group;
row_group = row_group->next) {
for (row = row_group->children; row; row = row->next) {
for (cell = row->children; cell; cell = cell->next) {
unsigned int flexible_columns = 0;
int min = 0, max = 0, fixed_width = 0;
int min = 0, max = 0, fixed_width = 0, cell_min;
signed long extra;
if (cell->columns == 1)
@ -1659,8 +1681,10 @@ void calculate_table_widths(struct box *table)
calculate_widths(cell);
i = cell->start_column;
cell_min = cell->min_width;
/* find min, max width so far of spanned columns */
/* find min, max width so far of
* spanned columns */
for (j = 0; j != cell->columns; j++) {
min += col[i + j].min;
max += col[i + j].max;
@ -1670,43 +1694,25 @@ void calculate_table_widths(struct box *table)
flexible_columns++;
}
if (cell->style->width.width == CSS_WIDTH_LENGTH &&
flexible_columns) {
/* cell is fixed width, and not all the spanned columns
* are fixed width, so split difference between spanned
* columns which aren't fixed width yet */
if (cell->style->width.width == CSS_WIDTH_LENGTH) {
width = len(&cell->style->width.value.length,
cell->style);
if (width < cell->min_width)
width = cell->min_width;
extra = width - fixed_width;
for (j = 0; j != cell->columns; j++)
if (col[i + j].type != COLUMN_WIDTH_FIXED)
extra -= col[i + j].min;
if (0 < extra)
extra = 1 + extra / flexible_columns;
else
extra = 0;
for (j = 0; j != cell->columns; j++) {
if (col[i + j].type != COLUMN_WIDTH_FIXED) {
col[i + j].width = col[i + j].max =
col[i + j].min += extra;
col[i + j].type = COLUMN_WIDTH_FIXED;
}
}
continue;
if (cell_min < width)
cell_min = width;
}
/* distribute extra min, max to spanned columns */
if (min < cell->min_width) {
if (min < cell_min) {
if (flexible_columns == 0) {
extra = 1 + (cell->min_width - min)
extra = 1 + (cell_min - min)
/ cell->columns;
for (j = 0; j != cell->columns; j++)
col[i + j].min = col[i + j].width =
col[i + j].max += extra;
for (j = 0; j != cell->columns; j++) {
col[i + j].min += extra;
if (col[i + j].max < col[i + j].min)
col[i + j].max = col[i + j].min;
}
} else {
extra = 1 + (cell->min_width - min)
extra = 1 + (cell_min - min)
/ flexible_columns;
max = 0;
for (j = 0; j != cell->columns; j++) {
@ -1714,8 +1720,8 @@ void calculate_table_widths(struct box *table)
col[i + j].min += extra;
if (col[i + j].max < col[i + j].min)
col[i + j].max = col[i + j].min;
max += col[i + j].max;
}
max += col[i + j].max;
}
}
}