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netsurf/render/box.c
James Bursa 6ce6e99659 [project @ 2004-06-18 22:55:28 by bursa] 
Output some more data in box_dump().

svn path=/import/netsurf/; revision=980
2004-06-18 22:55:28 +00:00

2634 lines
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/*
* This file is part of NetSurf, http://netsurf.sourceforge.net/
* Licensed under the GNU General Public License,
* http://www.opensource.org/licenses/gpl-license
* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
* Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
* Copyright 2003 John M Bell <jmb202@ecs.soton.ac.uk>
*/
#include <assert.h>
#include <ctype.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include "libxml/HTMLparser.h"
#include "netsurf/utils/config.h"
#include "netsurf/content/content.h"
#include "netsurf/css/css.h"
#include "netsurf/desktop/options.h"
#include "netsurf/render/box.h"
#include "netsurf/render/font.h"
#include "netsurf/render/form.h"
#include "netsurf/render/html.h"
#ifdef riscos
#include "netsurf/desktop/gui.h"
#endif
#ifdef WITH_PLUGIN
#include "netsurf/riscos/plugin.h"
#endif
#define NDEBUG
#include "netsurf/utils/log.h"
#include "netsurf/utils/messages.h"
#include "netsurf/utils/pool.h"
#include "netsurf/utils/url.h"
#include "netsurf/utils/utils.h"
/** Status of box tree construction. */
struct box_status {
struct content *content;
char *href;
char *title;
struct form* current_form;
};
/** Return type for special case element functions. */
struct box_result {
/** Box for element, if any, 0 otherwise. */
struct box *box;
/** Children of this element should be converted. */
bool convert_children;
/** Memory was exhausted when handling the element. */
bool memory_error;
};
/** MultiLength, as defined by HTML 4.01. */
struct box_multi_length {
enum { LENGTH_PX, LENGTH_PERCENT, LENGTH_RELATIVE } type;
float value;
};
static const content_type image_types[] = {
#ifdef WITH_JPEG
CONTENT_JPEG,
#endif
#ifdef WITH_GIF
CONTENT_GIF,
#endif
#ifdef WITH_PNG
CONTENT_PNG,
#endif
#ifdef WITH_SPRITE
CONTENT_SPRITE,
#endif
#ifdef WITH_DRAW
CONTENT_DRAW,
#endif
CONTENT_UNKNOWN };
static struct box * convert_xml_to_box(xmlNode * n, struct content *content,
struct css_style * parent_style,
struct box * parent, struct box *inline_container,
struct box_status status);
static struct css_style * box_get_style(struct content *c,
struct content ** stylesheet,
unsigned int stylesheet_count, struct css_style * parent_style,
xmlNode * n);
static void box_text_transform(char *s, unsigned int len,
css_text_transform tt);
static struct box_result box_a(xmlNode *n, struct box_status *status,
struct css_style *style);
static struct box_result box_body(xmlNode *n, struct box_status *status,
struct css_style *style);
static struct box_result box_br(xmlNode *n, struct box_status *status,
struct css_style *style);
static struct box_result box_image(xmlNode *n, struct box_status *status,
struct css_style *style);
static struct box_result box_form(xmlNode *n, struct box_status *status,
struct css_style *style);
static struct box_result box_textarea(xmlNode *n, struct box_status *status,
struct css_style *style);
static struct box_result box_select(xmlNode *n, struct box_status *status,
struct css_style *style);
static struct box_result box_input(xmlNode *n, struct box_status *status,
struct css_style *style);
static struct box *box_input_text(xmlNode *n, struct box_status *status,
struct css_style *style, bool password);
static struct box_result box_button(xmlNode *n, struct box_status *status,
struct css_style *style);
static struct box_result box_frameset(xmlNode *n, struct box_status *status,
struct css_style *style);
static void add_option(xmlNode* n, struct form_control* current_select, char *text);
static void box_normalise_block(struct box *block, pool box_pool);
static void box_normalise_table(struct box *table, pool box_pool);
void box_normalise_table_row_group(struct box *row_group,
unsigned int **row_span, unsigned int *table_columns,
pool box_pool);
void box_normalise_table_row(struct box *row,
unsigned int **row_span, unsigned int *table_columns,
pool box_pool);
static void box_normalise_inline_container(struct box *cont, pool box_pool);
static void box_free_box(struct box *box);
static struct box_result box_object(xmlNode *n, struct box_status *status,
struct css_style *style);
static struct box_result box_embed(xmlNode *n, struct box_status *status,
struct css_style *style);
static struct box_result box_applet(xmlNode *n, struct box_status *status,
struct css_style *style);
static struct box_result box_iframe(xmlNode *n, struct box_status *status,
struct css_style *style);
static bool plugin_decode(struct content* content, char* url, struct box* box,
struct object_params* po);
static struct box_multi_length *box_parse_multi_lengths(const char *s,
unsigned int *count);
/* element_table must be sorted by name */
struct element_entry {
char name[10]; /* element type */
struct box_result (*convert)(xmlNode *n, struct box_status *status,
struct css_style *style);
};
static const struct element_entry element_table[] = {
{"a", box_a},
{"applet", box_applet},
{"body", box_body},
{"br", box_br},
{"button", box_button},
{"embed", box_embed},
{"form", box_form},
{"frameset", box_frameset},
{"iframe", box_iframe},
{"img", box_image},
{"input", box_input},
{"object", box_object},
{"select", box_select},
{"textarea", box_textarea}
};
#define ELEMENT_TABLE_COUNT (sizeof(element_table) / sizeof(element_table[0]))
/**
* Add a child to a box tree node.
*/
void box_add_child(struct box * parent, struct box * child)
{
if (parent->children != 0) { /* has children already */
parent->last->next = child;
child->prev = parent->last;
} else { /* this is the first child */
parent->children = child;
child->prev = 0;
}
parent->last = child;
child->parent = parent;
}
/**
* Create a box tree node.
*/
struct box * box_create(struct css_style * style,
char *href, char *title, pool box_pool)
{
unsigned int i;
struct box *box = pool_alloc(box_pool, sizeof (struct box));
assert(box);
box->type = BOX_INLINE;
box->style = style;
box->width = UNKNOWN_WIDTH;
box->max_width = UNKNOWN_MAX_WIDTH;
box->href = href ? xstrdup(href) : 0;
box->title = title ? xstrdup(title) : 0;
box->columns = 1;
box->rows = 1;
box->text = 0;
box->space = 0;
box->clone = 0;
box->style_clone = 0;
box->length = 0;
box->start_column = 0;
box->next = 0;
box->prev = 0;
box->children = 0;
box->last = 0;
box->parent = 0;
box->float_children = 0;
box->next_float = 0;
box->col = 0;
box->font = 0;
box->gadget = 0;
box->usemap = 0;
box->background = 0;
box->object = 0;
box->object_params = 0;
box->object_state = 0;
box->x = box->y = 0;
box->height = 0;
for (i = 0; i != 4; i++)
box->margin[i] = box->padding[i] = box->border[i] = 0;
return box;
}
/**
* Insert a new box as a sibling to a box in a tree.
*/
void box_insert_sibling(struct box *box, struct box *new_box)
{
new_box->parent = box->parent;
new_box->prev = box;
new_box->next = box->next;
box->next = new_box;
if (new_box->next)
new_box->next->prev = new_box;
else if (new_box->parent)
new_box->parent->last = new_box;
}
/**
* make a box tree with style data from an xml tree
*/
void xml_to_box(xmlNode *n, struct content *c)
{
struct box_status status = {c, 0, 0, 0};
LOG(("node %p", n));
assert(c->type == CONTENT_HTML);
c->data.html.layout = box_create(0, 0, 0, c->data.html.box_pool);
c->data.html.layout->type = BOX_BLOCK;
c->data.html.style = xcalloc(1, sizeof(struct css_style));
memcpy(c->data.html.style, &css_base_style, sizeof(struct css_style));
c->data.html.style->font_size.value.length.value = option_font_size * 0.1;
c->data.html.fonts = font_new_set();
c->data.html.object_count = 0;
c->data.html.object = xcalloc(0, sizeof(*c->data.html.object));
convert_xml_to_box(n, c, c->data.html.style,
c->data.html.layout, 0, status);
LOG(("normalising"));
box_normalise_block(c->data.html.layout->children,
c->data.html.box_pool);
}
/**
* make a box tree with style data from an xml tree
*
* arguments:
* n xml tree
* content content structure
* parent_style style at this point in xml tree
* parent parent in box tree
* inline_container current inline container box, or 0
* status status for forms etc.
*
* returns:
* updated current inline container
*/
/* mapping from CSS display to box type
* this table must be in sync with css/css_enums */
static box_type box_map[] = {
0, /*CSS_DISPLAY_INHERIT,*/
BOX_INLINE, /*CSS_DISPLAY_INLINE,*/
BOX_BLOCK, /*CSS_DISPLAY_BLOCK,*/
BOX_BLOCK, /*CSS_DISPLAY_LIST_ITEM,*/
BOX_INLINE, /*CSS_DISPLAY_RUN_IN,*/
BOX_INLINE_BLOCK, /*CSS_DISPLAY_INLINE_BLOCK,*/
BOX_TABLE, /*CSS_DISPLAY_TABLE,*/
BOX_TABLE, /*CSS_DISPLAY_INLINE_TABLE,*/
BOX_TABLE_ROW_GROUP, /*CSS_DISPLAY_TABLE_ROW_GROUP,*/
BOX_TABLE_ROW_GROUP, /*CSS_DISPLAY_TABLE_HEADER_GROUP,*/
BOX_TABLE_ROW_GROUP, /*CSS_DISPLAY_TABLE_FOOTER_GROUP,*/
BOX_TABLE_ROW, /*CSS_DISPLAY_TABLE_ROW,*/
BOX_INLINE, /*CSS_DISPLAY_TABLE_COLUMN_GROUP,*/
BOX_INLINE, /*CSS_DISPLAY_TABLE_COLUMN,*/
BOX_TABLE_CELL, /*CSS_DISPLAY_TABLE_CELL,*/
BOX_INLINE /*CSS_DISPLAY_TABLE_CAPTION,*/
};
struct box * convert_xml_to_box(xmlNode * n, struct content *content,
struct css_style * parent_style,
struct box * parent, struct box *inline_container,
struct box_status status)
{
struct box * box = 0;
struct box * inline_container_c;
struct css_style * style = 0;
xmlNode * c;
char * s;
xmlChar * title0;
char * title = 0;
bool convert_children = true;
char *href_in = status.href;
assert(n != 0 && parent_style != 0 && parent != 0);
LOG(("node %p, node type %i", n, n->type));
if (n->type == XML_ELEMENT_NODE) {
struct element_entry *element;
gui_multitask();
style = box_get_style(content, content->data.html.stylesheet_content,
content->data.html.stylesheet_count, parent_style, n);
LOG(("display: %s", css_display_name[style->display]));
if (style->display == CSS_DISPLAY_NONE) {
free(style);
LOG(("node %p, node type %i END", n, n->type));
goto end;
}
/* floats are treated as blocks */
if (style->float_ == CSS_FLOAT_LEFT || style->float_ == CSS_FLOAT_RIGHT)
if (style->display == CSS_DISPLAY_INLINE)
style->display = CSS_DISPLAY_BLOCK;
/* extract title attribute, if present */
if ((title0 = xmlGetProp(n, (const xmlChar *) "title"))) {
status.title = title = squash_tolat1(title0);
xmlFree(title0);
}
/* special elements */
element = bsearch((const char *) n->name, element_table,
ELEMENT_TABLE_COUNT, sizeof(element_table[0]),
(int (*)(const void *, const void *)) strcmp);
if (element != 0) {
/* a special convert function exists for this element */
struct box_result res = element->convert(n, &status, style);
box = res.box;
convert_children = res.convert_children;
if (res.memory_error) {
/** \todo handle memory exhaustion */
}
if (box == 0) {
/* no box for this element */
assert(convert_children == 0);
free(style);
LOG(("node %p, node type %i END", n, n->type));
goto end;
}
} else {
/* general element */
box = box_create(style, status.href, title,
content->data.html.box_pool);
}
/* set box type from style if it has not been set already */
if (box->type == BOX_INLINE)
box->type = box_map[style->display];
} else if (n->type == XML_TEXT_NODE) {
/* text node: added to inline container below */
} else {
/* not an element or text node: ignore it (eg. comment) */
LOG(("node %p, node type %i END", n, n->type));
goto end;
}
content->size += sizeof(struct box) + sizeof(struct css_style);
if (n->type == XML_TEXT_NODE &&
(parent_style->white_space == CSS_WHITE_SPACE_NORMAL ||
parent_style->white_space == CSS_WHITE_SPACE_NOWRAP)) {
char *text = squash_tolat1(n->content);
/* if the text is just a space, combine it with the preceding
* text node, if any */
if (text[0] == ' ' && text[1] == 0) {
if (inline_container != 0) {
assert(inline_container->last != 0);
inline_container->last->space = 1;
}
free(text);
goto end;
}
if (inline_container == 0) {
/* this is the first inline node: make a container */
inline_container = box_create(0, 0, 0,
content->data.html.box_pool);
inline_container->type = BOX_INLINE_CONTAINER;
box_add_child(parent, inline_container);
}
box = box_create(parent_style, status.href, title,
content->data.html.box_pool);
box->text = text;
box->style_clone = 1;
box->length = strlen(text);
if (text[box->length - 1] == ' ') {
box->space = 1;
box->length--;
}
if (parent_style->text_transform != CSS_TEXT_TRANSFORM_NONE)
box_text_transform(box->text, box->length,
parent_style->text_transform);
if (parent_style->white_space == CSS_WHITE_SPACE_NOWRAP) {
unsigned int i;
for (i = 0; i != box->length; i++)
if (text[i] == ' ')
text[i] = 160;
}
box->font = font_open(content->data.html.fonts, box->style);
box_add_child(inline_container, box);
if (text[0] == ' ') {
box->length--;
memmove(text, text + 1, box->length);
if (box->prev != 0)
box->prev->space = 1;
}
goto end;
} else if (n->type == XML_TEXT_NODE) {
/* white-space: pre */
char *text = tolat1_pre(n->content);
char *current;
assert(parent_style->white_space == CSS_WHITE_SPACE_PRE);
if (parent_style->text_transform != CSS_TEXT_TRANSFORM_NONE)
box_text_transform(text, strlen(text),
parent_style->text_transform);
for (current = text; *current; current++)
if (*current == ' ' || *current == '\t')
*current = 160;
current = text;
do {
size_t len = strcspn(current, "\r\n");
char old = current[len];
current[len] = 0;
if (!inline_container) {
inline_container = box_create(0, 0, 0,
content->data.html.box_pool);
inline_container->type = BOX_INLINE_CONTAINER;
box_add_child(parent, inline_container);
}
box = box_create(parent_style, status.href, title,
content->data.html.box_pool);
box->type = BOX_INLINE;
box->style_clone = 1;
box->text = xstrdup(current);
box->length = strlen(box->text);
box->font = font_open(content->data.html.fonts, box->style);
box_add_child(inline_container, box);
current[len] = old;
current += len;
if (current[0] == '\r' && current[1] == '\n') {
current += 2;
inline_container = 0;
} else if (current[0] != 0) {
current++;
inline_container = 0;
}
} while (*current);
free(text);
goto end;
} else if (box->type == BOX_INLINE ||
box->type == BOX_INLINE_BLOCK ||
style->float_ == CSS_FLOAT_LEFT ||
style->float_ == CSS_FLOAT_RIGHT ||
box->type == BOX_BR) {
/* this is an inline box */
if (inline_container == 0) {
/* this is the first inline node: make a container */
inline_container = box_create(0, 0, 0,
content->data.html.box_pool);
inline_container->type = BOX_INLINE_CONTAINER;
box_add_child(parent, inline_container);
}
if (box->type == BOX_INLINE || box->type == BOX_BR) {
/* inline box: add to tree and recurse */
box_add_child(inline_container, box);
if (convert_children) {
for (c = n->children; c != 0; c = c->next)
inline_container = convert_xml_to_box(c, content, style,
parent, inline_container,
status);
}
LOG(("node %p, node type %i END", n, n->type));
goto end;
} else if (box->type == BOX_INLINE_BLOCK) {
/* inline block box: add to tree and recurse */
box_add_child(inline_container, box);
if (convert_children) {
inline_container_c = 0;
for (c = n->children; c != 0; c = c->next)
inline_container_c = convert_xml_to_box(c, content, style,
box, inline_container_c,
status);
}
LOG(("node %p, node type %i END", n, n->type));
goto end;
} else {
/* float: insert a float box between the parent and current node */
assert(style->float_ == CSS_FLOAT_LEFT || style->float_ == CSS_FLOAT_RIGHT);
LOG(("float"));
parent = box_create(0, status.href, title,
content->data.html.box_pool);
if (style->float_ == CSS_FLOAT_LEFT)
parent->type = BOX_FLOAT_LEFT;
else
parent->type = BOX_FLOAT_RIGHT;
box_add_child(inline_container, parent);
if (box->type == BOX_INLINE || box->type == BOX_INLINE_BLOCK)
box->type = BOX_BLOCK;
}
}
assert(n->type == XML_ELEMENT_NODE);
/* non-inline box: add to tree and recurse */
box_add_child(parent, box);
if (convert_children) {
inline_container_c = 0;
for (c = n->children; c != 0; c = c->next)
inline_container_c = convert_xml_to_box(c, content, style,
box, inline_container_c,
status);
}
if (style->float_ == CSS_FLOAT_NONE)
/* new inline container unless this is a float */
inline_container = 0;
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "colspan"))) {
int colspan = atoi(s);
if (1 <= colspan && colspan <= 100)
box->columns = colspan;
xmlFree(s);
}
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "rowspan"))) {
if ((box->rows = strtol(s, 0, 10)) == 0)
box->rows = 1;
xmlFree(s);
}
end:
free(title);
if (!href_in)
xmlFree(status.href);
/* Now fetch any background image for this box */
if (box && box->style && box->style->background_image.type ==
CSS_BACKGROUND_IMAGE_URI) {
char *url = strdup(box->style->background_image.uri);
if (!url) {
/** \todo handle this */
return inline_container;
}
/* start fetch */
html_fetch_object(content, url, box, image_types,
content->available_width, 1000, true);
}
LOG(("node %p, node type %i END", n, n->type));
return inline_container;
}
/**
* Get the style for an element
*
* The style is collected from three sources:
* 1. any styles for this element in the document stylesheet(s)
* 2. non-CSS HTML attributes
* 3. the 'style' attribute
*/
struct css_style * box_get_style(struct content *c,
struct content ** stylesheet,
unsigned int stylesheet_count, struct css_style * parent_style,
xmlNode * n)
{
struct css_style * style = xcalloc(1, sizeof(struct css_style));
struct css_style style_new;
char * s;
unsigned int i;
memcpy(style, parent_style, sizeof(struct css_style));
memcpy(&style_new, &css_blank_style, sizeof(struct css_style));
for (i = 0; i != stylesheet_count; i++) {
if (stylesheet[i] != 0) {
assert(stylesheet[i]->type == CONTENT_CSS);
css_get_style(stylesheet[i], n, &style_new);
}
}
css_cascade(style, &style_new);
/* This property only applies to the body element, if you believe
the spec. Many browsers seem to allow it on other elements too,
so let's be generic ;)
*/
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "background"))) {
style->background_image.type = CSS_BACKGROUND_IMAGE_URI;
/**\todo This will leak memory. */
style->background_image.uri = url_join(s, c->data.html.base_url);
if (!style->background_image.uri)
style->background_image.type = CSS_BACKGROUND_IMAGE_NONE;
xmlFree(s);
}
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "bgcolor"))) {
unsigned int r, g, b;
if (s[0] == '#' && sscanf(s + 1, "%2x%2x%2x", &r, &g, &b) == 3)
style->background_color = (b << 16) | (g << 8) | r;
else if (s[0] != '#')
style->background_color = named_colour(s);
xmlFree(s);
}
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "color"))) {
unsigned int r, g, b;
if (s[0] == '#' && sscanf(s + 1, "%2x%2x%2x", &r, &g, &b) == 3)
style->color = (b << 16) | (g << 8) | r;
else if (s[0] != '#')
style->color = named_colour(s);
xmlFree(s);
}
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "height"))) {
float value = atof(s);
if (value < 0) {
/* ignore negative values */
} else if (strrchr(s, '%')) {
/*the specification doesn't make clear what
* percentage heights mean, so ignore them */
} else {
style->height.height = CSS_HEIGHT_LENGTH;
style->height.length.unit = CSS_UNIT_PX;
style->height.length.value = value;
}
xmlFree(s);
}
if (strcmp((const char *) n->name, "input") == 0) {
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "size"))) {
int size = atoi(s);
if (0 < size) {
char *type = (char *) xmlGetProp(n, (const xmlChar *) "type");
style->width.width = CSS_WIDTH_LENGTH;
if (!type || strcasecmp(type, "text") == 0 ||
strcasecmp(type, "password") == 0)
/* in characters for text, password, file */
style->width.value.length.unit = CSS_UNIT_EX;
else if (strcasecmp(type, "file") != 0)
/* in pixels otherwise */
style->width.value.length.unit = CSS_UNIT_PX;
style->width.value.length.value = size;
if (type)
xmlFree(type);
}
xmlFree(s);
}
}
if (strcmp((const char *) n->name, "body") == 0) {
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "text"))) {
unsigned int r, g, b;
if (s[0] == '#' && sscanf(s + 1, "%2x%2x%2x", &r, &g, &b) == 3)
style->color = (b << 16) | (g << 8) | r;
else if (s[0] != '#')
style->color = named_colour(s);
xmlFree(s);
}
}
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "width"))) {
float value = atof(s);
if (value < 0) {
/* ignore negative values */
} else if (strrchr(s, '%')) {
style->width.width = CSS_WIDTH_PERCENT;
style->width.value.percent = value;
} else {
style->width.width = CSS_WIDTH_LENGTH;
style->width.value.length.unit = CSS_UNIT_PX;
style->width.value.length.value = value;
}
xmlFree(s);
}
if (strcmp((const char *) n->name, "textarea") == 0) {
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "rows"))) {
int value = atoi(s);
if (0 < value) {
style->height.height = CSS_HEIGHT_LENGTH;
style->height.length.unit = CSS_UNIT_EM;
style->height.length.value = value;
}
xmlFree(s);
}
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "cols"))) {
int value = atoi(s);
if (0 < value) {
style->width.width = CSS_WIDTH_LENGTH;
style->width.value.length.unit = CSS_UNIT_EX;
style->width.value.length.value = value;
}
xmlFree(s);
}
}
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "style"))) {
struct css_style astyle;
memcpy(&astyle, &css_empty_style, sizeof(struct css_style));
css_parse_property_list(c, &astyle, s);
css_cascade(style, &astyle);
xmlFree(s);
}
return style;
}
/**
* Apply the CSS text-transform property to some text.
*
* \param s string to transform
* \param len length of s
* \param tt transform type
*/
void box_text_transform(char *s, unsigned int len,
css_text_transform tt)
{
unsigned int i;
if (len == 0)
return;
switch (tt) {
case CSS_TEXT_TRANSFORM_UPPERCASE:
for (i = 0; i != len; i++)
s[i] = toupper(s[i]);
break;
case CSS_TEXT_TRANSFORM_LOWERCASE:
for (i = 0; i != len; i++)
s[i] = tolower(s[i]);
break;
case CSS_TEXT_TRANSFORM_CAPITALIZE:
s[0] = toupper(s[0]);
for (i = 1; i != len; i++)
if (isspace(s[i - 1]))
s[i] = toupper(s[i]);
break;
default:
break;
}
}
/*
* Special case elements
*
* These functions are called by convert_xml_to_box when an element is being
* converted, according to the entries in element_table (top of file).
*
* The parameters are the xmlNode, a status structure for the conversion, and
* the style found for the element.
*
* If a box is created, it is returned in the result structure. The
* convert_children field should be 1 if convert_xml_to_box should convert the
* node's children recursively, 0 if it should ignore them (presumably they
* have been processed in some way by the function). If box is 0, no box will
* be created for that element, and convert_children must be 0.
*/
struct box_result box_a(xmlNode *n, struct box_status *status,
struct css_style *style)
{
struct box *box;
char *s;
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "href")))
status->href = s;
box = box_create(style, status->href, status->title,
status->content->data.html.box_pool);
return (struct box_result) {box, true, false};
}
struct box_result box_body(xmlNode *n, struct box_status *status,
struct css_style *style)
{
struct box *box;
status->content->data.html.background_colour = style->background_color;
box = box_create(style, status->href, status->title,
status->content->data.html.box_pool);
return (struct box_result) {box, true, false};
}
struct box_result box_br(xmlNode *n, struct box_status *status,
struct css_style *style)
{
struct box *box;
box = box_create(style, status->href, status->title,
status->content->data.html.box_pool);
box->type = BOX_BR;
return (struct box_result) {box, false, false};
}
struct box_result box_image(xmlNode *n, struct box_status *status,
struct css_style *style)
{
struct box *box;
char *s, *url, *s1, *map;
xmlChar *s2;
box = box_create(style, status->href, status->title,
status->content->data.html.box_pool);
/* handle alt text */
if ((s2 = xmlGetProp(n, (const xmlChar *) "alt"))) {
box->text = squash_tolat1(s2);
box->length = strlen(box->text);
box->font = font_open(status->content->data.html.fonts, style);
xmlFree(s2);
}
/* img without src is an error */
if (!(s = (char *) xmlGetProp(n, (const xmlChar *) "src")))
return (struct box_result) {box, false, false};
/* imagemap associated with this image */
if ((map = xmlGetProp(n, (const xmlChar *) "usemap"))) {
if (map[0] == '#') {
box->usemap = xstrdup(map+1);
}
else {
box->usemap = xstrdup(map);
}
xmlFree(map);
}
/* remove leading and trailing whitespace */
s1 = strip(s);
url = url_join(s1, status->content->data.html.base_url);
if (!url) {
xmlFree(s);
return (struct box_result) {box, false, false};
}
LOG(("image '%s'", url));
xmlFree(s);
/* start fetch */
html_fetch_object(status->content, url, box, image_types,
status->content->available_width, 1000, false);
return (struct box_result) {box, false, false};
}
struct box_result box_form(xmlNode *n, struct box_status *status,
struct css_style *style)
{
char *s, *s2;
struct box *box;
struct form *form;
box = box_create(style, status->href, status->title,
status->content->data.html.box_pool);
s = (char *) xmlGetProp(n, (const xmlChar *) "action");
if (!s) {
/* the action attribute is required */
return (struct box_result) {box, true, false};
}
status->current_form = form = xcalloc(1, sizeof(*form));
form->action = s;
form->method = method_GET;
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "method"))) {
if (strcasecmp(s, "post") == 0) {
form->method = method_POST_URLENC;
if ((s2 = (char *) xmlGetProp(n, (const xmlChar *) "enctype"))) {
if (strcasecmp(s2, "multipart/form-data") == 0)
form->method = method_POST_MULTIPART;
xmlFree(s2);
}
}
xmlFree(s);
}
form->controls = form->last_control = 0;
return (struct box_result) {box, true, false};
}
struct box_result box_textarea(xmlNode *n, struct box_status *status,
struct css_style *style)
{
xmlChar *content, *current;
struct box *box, *inline_container, *inline_box;
char* s;
box = box_create(style, NULL, 0,
status->content->data.html.box_pool);
box->type = BOX_INLINE_BLOCK;
box->gadget = form_new_control(GADGET_TEXTAREA);
if (!box->gadget) {
free(box);
return (struct box_result) {0, false, true};
}
box->gadget->box = box;
if (status->current_form)
form_add_control(status->current_form, box->gadget);
else
box->gadget->form = 0;
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "name"))) {
box->gadget->name = strdup(s);
xmlFree(s);
if (!box->gadget->name) {
box_free(box);
return (struct box_result) {0, false, true};
}
}
/* split the content at newlines and make an inline container with an
* inline box for each line */
current = content = xmlNodeGetContent(n);
do {
size_t len = strcspn(current, "\r\n");
char old = current[len];
current[len] = 0;
inline_container = box_create(0, 0, 0,
status->content->data.html.box_pool);
inline_container->type = BOX_INLINE_CONTAINER;
inline_box = box_create(style, 0, 0,
status->content->data.html.box_pool);
inline_box->type = BOX_INLINE;
inline_box->style_clone = 1;
inline_box->text = tolat1(current);
inline_box->length = strlen(inline_box->text);
inline_box->font = font_open(status->content->data.html.fonts, style);
box_add_child(inline_container, inline_box);
box_add_child(box, inline_container);
current[len] = old;
current += len;
if (current[0] == '\r' && current[1] == '\n')
current += 2;
else if (current[0] != 0)
current++;
} while (*current);
xmlFree(content);
return (struct box_result) {box, false, false};
}
struct box_result box_select(xmlNode *n, struct box_status *status,
struct css_style *style)
{
struct box *box;
struct box *inline_container;
struct box *inline_box;
struct form_control *gadget;
char* s;
xmlNode *c, *c2;
gadget = form_new_control(GADGET_SELECT);
if (!gadget)
return (struct box_result) {0, false, true};
if (status->current_form)
form_add_control(status->current_form, gadget);
else
gadget->form = 0;
gadget->data.select.multiple = false;
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "multiple"))) {
gadget->data.select.multiple = true;
xmlFree(s);
}
gadget->data.select.items = NULL;
gadget->data.select.last_item = NULL;
gadget->data.select.num_items = 0;
gadget->data.select.num_selected = 0;
for (c = n->children; c != 0; c = c->next) {
if (strcmp((const char *) c->name, "option") == 0) {
xmlChar *content = xmlNodeGetContent(c);
add_option(c, gadget, squash_tolat1(content));
xmlFree(content);
gadget->data.select.num_items++;
} else if (strcmp((const char *) c->name, "optgroup") == 0) {
for (c2 = c->children; c2; c2 = c2->next) {
if (strcmp((const char *) c2->name, "option") == 0) {
xmlChar *content = xmlNodeGetContent(c2);
add_option(c2, gadget, squash_tolat1(content));
xmlFree(content);
gadget->data.select.num_items++;
}
}
}
}
if (gadget->data.select.num_items == 0) {
/* no options: ignore entire select */
form_free_control(gadget);
return (struct box_result) {0, false, false};
}
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "name"))) {
gadget->name = strdup(s);
xmlFree(s);
if (!gadget->name) {
form_free_control(gadget);
return (struct box_result) {0, false, true};
}
}
box = box_create(style, NULL, 0, status->content->data.html.box_pool);
box->type = BOX_INLINE_BLOCK;
box->gadget = gadget;
gadget->box = box;
inline_container = box_create(0, 0, 0,
status->content->data.html.box_pool);
inline_container->type = BOX_INLINE_CONTAINER;
inline_box = box_create(style, 0, 0,
status->content->data.html.box_pool);
inline_box->type = BOX_INLINE;
inline_box->style_clone = 1;
box_add_child(inline_container, inline_box);
box_add_child(box, inline_container);
if (!gadget->data.select.multiple &&
gadget->data.select.num_selected == 0) {
gadget->data.select.current = gadget->data.select.items;
gadget->data.select.current->initial_selected =
gadget->data.select.current->selected = true;
gadget->data.select.num_selected = 1;
}
if (gadget->data.select.num_selected == 0)
inline_box->text = xstrdup(messages_get("Form_None"));
else if (gadget->data.select.num_selected == 1)
inline_box->text = xstrdup(gadget->data.select.current->text);
else
inline_box->text = xstrdup(messages_get("Form_Many"));
inline_box->length = strlen(inline_box->text);
inline_box->font = font_open(status->content->data.html.fonts, style);
return (struct box_result) {box, false, false};
}
void add_option(xmlNode* n, struct form_control* current_select, char *text)
{
struct form_option *option = xcalloc(1, sizeof(struct form_option));
char *s, *c;
assert(current_select != 0);
if (current_select->data.select.items == 0)
current_select->data.select.items = option;
else
current_select->data.select.last_item->next = option;
current_select->data.select.last_item = option;
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "value"))) {
option->value = xstrdup(s);
xmlFree(s);
} else {
option->value = xstrdup(text);
}
for (c = text; *c; c++)
if (*c == ' ')
*c = 160;
option->selected = option->initial_selected = false;
option->text = text;
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "selected"))) {
xmlFree(s);
if (current_select->data.select.num_selected == 0 ||
current_select->data.select.multiple) {
option->selected = option->initial_selected = true;
current_select->data.select.num_selected++;
current_select->data.select.current = option;
}
}
}
struct box_result box_input(xmlNode *n, struct box_status *status,
struct css_style *style)
{
struct box* box = 0;
struct form_control *gadget = 0;
char *s, *type, *url;
type = (char *) xmlGetProp(n, (const xmlChar *) "type");
if (type && strcasecmp(type, "password") == 0) {
box = box_input_text(n, status, style, true);
gadget = box->gadget;
gadget->box = box;
} else if (type && strcasecmp(type, "file") == 0) {
box = box_create(style, NULL, 0,
status->content->data.html.box_pool);
box->type = BOX_INLINE_BLOCK;
box->gadget = gadget = form_new_control(GADGET_FILE);
if (!gadget) {
box_free_box(box);
xmlFree(type);
return (struct box_result) {0, false, true};
}
gadget->box = box;
box->font = font_open(status->content->data.html.fonts, style);
} else if (type && strcasecmp(type, "hidden") == 0) {
/* no box for hidden inputs */
gadget = form_new_control(GADGET_HIDDEN);
if (!gadget) {
xmlFree(type);
return (struct box_result) {0, false, true};
}
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "value"))) {
gadget->value = strdup(s);
xmlFree(s);
if (!gadget->value) {
form_free_control(gadget);
xmlFree(type);
return (struct box_result) {0, false, true};
}
}
} else if (type && (strcasecmp(type, "checkbox") == 0 ||
strcasecmp(type, "radio") == 0)) {
box = box_create(style, NULL, 0,
status->content->data.html.box_pool);
box->gadget = gadget = form_new_control(GADGET_RADIO);
if (!gadget) {
box_free_box(box);
xmlFree(type);
return (struct box_result) {0, false, true};
}
gadget->box = box;
if (type[0] == 'c' || type[0] == 'C')
gadget->type = GADGET_CHECKBOX;
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "checked"))) {
gadget->selected = true;
xmlFree(s);
}
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "value"))) {
gadget->value = strdup(s);
xmlFree(s);
if (!gadget->value) {
box_free_box(box);
xmlFree(type);
return (struct box_result) {0, false, true};
}
}
} else if (type && (strcasecmp(type, "submit") == 0 ||
strcasecmp(type, "reset") == 0)) {
struct box_result result = box_button(n, status, style);
struct box *inline_container, *inline_box;
box = result.box;
inline_container = box_create(0, 0, 0,
status->content->data.html.box_pool);
inline_container->type = BOX_INLINE_CONTAINER;
inline_box = box_create(style, 0, 0,
status->content->data.html.box_pool);
inline_box->type = BOX_INLINE;
inline_box->style_clone = 1;
if (box->gadget->value)
inline_box->text = tolat1(box->gadget->value);
else if (box->gadget->type == GADGET_SUBMIT)
inline_box->text = xstrdup(messages_get("Form_Submit"));
else
inline_box->text = xstrdup(messages_get("Form_Reset"));
inline_box->length = strlen(inline_box->text);
inline_box->font = font_open(status->content->data.html.fonts, style);
box_add_child(inline_container, inline_box);
box_add_child(box, inline_container);
} else if (type && strcasecmp(type, "button") == 0) {
struct box_result result = box_button(n, status, style);
struct box *inline_container, *inline_box;
box = result.box;
inline_container = box_create(0, 0, 0,
status->content->data.html.box_pool);
inline_container->type = BOX_INLINE_CONTAINER;
inline_box = box_create(style, 0, 0,
status->content->data.html.box_pool);
inline_box->type = BOX_INLINE;
inline_box->style_clone = 1;
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "value"))) {
inline_box->text = s;
}
else {
inline_box->text = xstrdup("Button");
}
inline_box->length = strlen(inline_box->text);
inline_box->font = font_open(status->content->data.html.fonts, style);
box_add_child(inline_container, inline_box);
box_add_child(box, inline_container);
} else if (type && strcasecmp(type, "image") == 0) {
box = box_create(style, NULL, 0,
status->content->data.html.box_pool);
box->gadget = gadget = form_new_control(GADGET_IMAGE);
if (!gadget) {
box_free_box(box);
xmlFree(type);
return (struct box_result) {0, false, true};
}
gadget->box = box;
gadget->type = GADGET_IMAGE;
if ((s = (char *) xmlGetProp(n, (const xmlChar*) "src"))) {
url = url_join(s, status->content->data.html.base_url);
if (url)
html_fetch_object(status->content, url, box,
image_types,
status->content->available_width,
1000, false);
xmlFree(s);
}
} else {
/* the default type is "text" */
box = box_input_text(n, status, style, false);
gadget = box->gadget;
gadget->box = box;
}
if (type != 0)
xmlFree(type);
if (gadget != 0) {
if (status->current_form)
form_add_control(status->current_form, gadget);
else
gadget->form = 0;
s = (char *) xmlGetProp(n, (const xmlChar *) "name");
if (s) {
gadget->name = strdup(s);
xmlFree(s);
if (!gadget->name) {
box_free_box(box);
return (struct box_result) {0, false, true};
}
}
}
return (struct box_result) {box, false, false};
}
struct box *box_input_text(xmlNode *n, struct box_status *status,
struct css_style *style, bool password)
{
char *s;
unsigned int i;
struct box *box = box_create(style, 0, 0,
status->content->data.html.box_pool);
struct box *inline_container, *inline_box;
box->type = BOX_INLINE_BLOCK;
box->gadget = form_new_control(GADGET_TEXTBOX);
box->gadget->box = box;
box->gadget->maxlength = 100;
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "maxlength"))) {
box->gadget->maxlength = atoi(s);
xmlFree(s);
}
s = (char *) xmlGetProp(n, (const xmlChar *) "value");
box->gadget->value = s ? tolat1(s) : xstrdup("");
box->gadget->initial_value = xstrdup(box->gadget->value);
if (s)
xmlFree(s);
inline_container = box_create(0, 0, 0,
status->content->data.html.box_pool);
inline_container->type = BOX_INLINE_CONTAINER;
inline_box = box_create(style, 0, 0,
status->content->data.html.box_pool);
inline_box->type = BOX_INLINE;
inline_box->style_clone = 1;
inline_box->length = strlen(box->gadget->value);
if (password) {
box->gadget->type = GADGET_PASSWORD;
inline_box->text = xcalloc(inline_box->length + 1, 1);
for (i = 0; i != inline_box->length; i++)
inline_box->text[i] = '*';
} else {
box->gadget->type = GADGET_TEXTBOX;
inline_box->text = xstrdup(box->gadget->value);
/* replace spaces with hard spaces to prevent line wrapping */
for (i = 0; i != inline_box->length; i++)
if (inline_box->text[i] == ' ')
inline_box->text[i] = 160;
}
inline_box->font = font_open(status->content->data.html.fonts, style);
box_add_child(inline_container, inline_box);
box_add_child(box, inline_container);
return box;
}
struct box_result box_button(xmlNode *n, struct box_status *status,
struct css_style *style)
{
xmlChar *s;
char *type = (char *) xmlGetProp(n, (const xmlChar *) "type");
struct box *box = box_create(style, 0, 0,
status->content->data.html.box_pool);
box->type = BOX_INLINE_BLOCK;
if (!type || strcasecmp(type, "submit") == 0) {
box->gadget = form_new_control(GADGET_SUBMIT);
} else if (strcasecmp(type, "reset") == 0) {
box->gadget = form_new_control(GADGET_RESET);
} else {
/* type="button" or unknown: just render the contents */
xmlFree(type);
return (struct box_result) {box, true, false};
}
if (type)
xmlFree(type);
if (!box->gadget) {
box_free_box(box);
return (struct box_result) {0, false, true};
}
if (status->current_form)
form_add_control(status->current_form, box->gadget);
else
box->gadget->form = 0;
box->gadget->box = box;
if ((s = xmlGetProp(n, (const xmlChar *) "name"))) {
box->gadget->name = strdup((char *) s);
xmlFree(s);
if (!box->gadget->name) {
box_free_box(box);
return (struct box_result) {0, false, true};
}
}
if ((s = xmlGetProp(n, (const xmlChar *) "value"))) {
box->gadget->value = strdup((char *) s);
xmlFree(s);
if (!box->gadget->value) {
box_free_box(box);
return (struct box_result) {0, false, true};
}
}
return (struct box_result) {box, true, false};
}
/**
* print a box tree to standard output
*/
void box_dump(struct box * box, unsigned int depth)
{
unsigned int i;
struct box * c;
for (i = 0; i < depth; i++)
fprintf(stderr, " ");
fprintf(stderr, "%p ", box);
fprintf(stderr, "x%i y%i w%i h%i ", box->x, box->y, box->width, box->height);
if ((unsigned long)box->max_width != UNKNOWN_MAX_WIDTH)
fprintf(stderr, "min%i max%i ", box->min_width, box->max_width);
switch (box->type) {
case BOX_BLOCK: fprintf(stderr, "BOX_BLOCK "); break;
case BOX_INLINE_CONTAINER: fprintf(stderr, "BOX_INLINE_CONTAINER "); break;
case BOX_INLINE: fprintf(stderr, "BOX_INLINE "); break;
case BOX_INLINE_BLOCK: fprintf(stderr, "BOX_INLINE_BLOCK "); break;
case BOX_TABLE: fprintf(stderr, "BOX_TABLE [columns %i] ",
box->columns); break;
case BOX_TABLE_ROW: fprintf(stderr, "BOX_TABLE_ROW "); break;
case BOX_TABLE_CELL: fprintf(stderr, "BOX_TABLE_CELL [columns %i, "
"start %i, rows %i] ", box->columns,
box->start_column, box->rows); break;
case BOX_TABLE_ROW_GROUP: fprintf(stderr, "BOX_TABLE_ROW_GROUP "); break;
case BOX_FLOAT_LEFT: fprintf(stderr, "BOX_FLOAT_LEFT "); break;
case BOX_FLOAT_RIGHT: fprintf(stderr, "BOX_FLOAT_RIGHT "); break;
case BOX_BR: fprintf(stderr, "BOX_BR "); break;
default: fprintf(stderr, "Unknown box type ");
}
if (box->text)
fprintf(stderr, "'%.*s' ", (int) box->length, box->text);
if (box->space)
fprintf(stderr, "space ");
if (box->object)
fprintf(stderr, "(object '%s') ", box->object->url);
if (box->style)
css_dump_style(box->style);
if (box->href != 0)
fprintf(stderr, " -> '%s' ", box->href);
if (box->title != 0)
fprintf(stderr, "[%s]", box->title);
fprintf(stderr, "\n");
for (c = box->children; c != 0; c = c->next)
box_dump(c, depth + 1);
}
/**
* ensure the box tree is correctly nested
*
* parent permitted child nodes
* BLOCK, INLINE_BLOCK BLOCK, INLINE_CONTAINER, TABLE
* INLINE_CONTAINER INLINE, INLINE_BLOCK, FLOAT_LEFT, FLOAT_RIGHT, BR
* INLINE none
* TABLE at least 1 TABLE_ROW_GROUP
* TABLE_ROW_GROUP at least 1 TABLE_ROW
* TABLE_ROW at least 1 TABLE_CELL
* TABLE_CELL BLOCK, INLINE_CONTAINER, TABLE (same as BLOCK)
* FLOAT_(LEFT|RIGHT) exactly 1 BLOCK or TABLE
*/
void box_normalise_block(struct box *block, pool box_pool)
{
struct box *child;
struct box *next_child;
struct box *table;
struct css_style *style;
assert(block != 0);
assert(block->type == BOX_BLOCK || block->type == BOX_INLINE_BLOCK ||
block->type == BOX_TABLE_CELL);
LOG(("block %p, block->type %u", block, block->type));
gui_multitask();
for (child = block->children; child != 0; child = next_child) {
LOG(("child %p, child->type = %d", child, child->type));
next_child = child->next; /* child may be destroyed */
switch (child->type) {
case BOX_BLOCK:
/* ok */
box_normalise_block(child, box_pool);
break;
case BOX_INLINE_CONTAINER:
box_normalise_inline_container(child, box_pool);
break;
case BOX_TABLE:
box_normalise_table(child, box_pool);
break;
case BOX_INLINE:
case BOX_INLINE_BLOCK:
case BOX_FLOAT_LEFT:
case BOX_FLOAT_RIGHT:
case BOX_BR:
/* should have been wrapped in inline
container by convert_xml_to_box() */
assert(0);
break;
case BOX_TABLE_ROW_GROUP:
case BOX_TABLE_ROW:
case BOX_TABLE_CELL:
/* insert implied table */
style = xcalloc(1, sizeof(struct css_style));
memcpy(style, block->style, sizeof(struct css_style));
css_cascade(style, &css_blank_style);
table = box_create(style, block->href, 0, box_pool);
table->type = BOX_TABLE;
if (child->prev == 0)
block->children = table;
else
child->prev->next = table;
table->prev = child->prev;
while (child != 0 && (
child->type == BOX_TABLE_ROW_GROUP ||
child->type == BOX_TABLE_ROW ||
child->type == BOX_TABLE_CELL)) {
box_add_child(table, child);
next_child = child->next;
child->next = 0;
child = next_child;
}
table->last->next = 0;
table->next = next_child = child;
if (table->next)
table->next->prev = table;
table->parent = block;
box_normalise_table(table, box_pool);
break;
default:
assert(0);
}
}
LOG(("block %p done", block));
}
void box_normalise_table(struct box *table, pool box_pool)
{
struct box *child;
struct box *next_child;
struct box *row_group;
struct css_style *style;
unsigned int *row_span = xcalloc(2, sizeof(row_span[0]));
unsigned int table_columns = 1;
assert(table != 0);
assert(table->type == BOX_TABLE);
LOG(("table %p", table));
row_span[0] = row_span[1] = 0;
for (child = table->children; child != 0; child = next_child) {
next_child = child->next;
switch (child->type) {
case BOX_TABLE_ROW_GROUP:
/* ok */
box_normalise_table_row_group(child, &row_span,
&table_columns, box_pool);
break;
case BOX_BLOCK:
case BOX_INLINE_CONTAINER:
case BOX_TABLE:
case BOX_TABLE_ROW:
case BOX_TABLE_CELL:
/* insert implied table row group */
style = xcalloc(1, sizeof(struct css_style));
memcpy(style, table->style, sizeof(struct css_style));
css_cascade(style, &css_blank_style);
row_group = box_create(style, table->href, 0,
box_pool);
row_group->type = BOX_TABLE_ROW_GROUP;
if (child->prev == 0)
table->children = row_group;
else
child->prev->next = row_group;
row_group->prev = child->prev;
while (child != 0 && (
child->type == BOX_BLOCK ||
child->type == BOX_INLINE_CONTAINER ||
child->type == BOX_TABLE ||
child->type == BOX_TABLE_ROW ||
child->type == BOX_TABLE_CELL)) {
box_add_child(row_group, child);
next_child = child->next;
child->next = 0;
child = next_child;
}
row_group->last->next = 0;
row_group->next = next_child = child;
if (row_group->next)
row_group->next->prev = row_group;
row_group->parent = table;
box_normalise_table_row_group(row_group, &row_span,
&table_columns, box_pool);
break;
case BOX_INLINE:
case BOX_INLINE_BLOCK:
case BOX_FLOAT_LEFT:
case BOX_FLOAT_RIGHT:
case BOX_BR:
/* should have been wrapped in inline
container by convert_xml_to_box() */
assert(0);
break;
default:
fprintf(stderr, "%i\n", child->type);
assert(0);
}
}
table->columns = table_columns;
free(row_span);
if (table->children == 0) {
LOG(("table->children == 0, removing"));
if (table->prev == 0)
table->parent->children = table->next;
else
table->prev->next = table->next;
if (table->next != 0)
table->next->prev = table->prev;
box_free(table);
}
LOG(("table %p done", table));
}
void box_normalise_table_row_group(struct box *row_group,
unsigned int **row_span, unsigned int *table_columns,
pool box_pool)
{
struct box *child;
struct box *next_child;
struct box *row;
struct css_style *style;
assert(row_group != 0);
assert(row_group->type == BOX_TABLE_ROW_GROUP);
LOG(("row_group %p", row_group));
for (child = row_group->children; child != 0; child = next_child) {
next_child = child->next;
switch (child->type) {
case BOX_TABLE_ROW:
/* ok */
box_normalise_table_row(child, row_span,
table_columns, box_pool);
break;
case BOX_BLOCK:
case BOX_INLINE_CONTAINER:
case BOX_TABLE:
case BOX_TABLE_ROW_GROUP:
case BOX_TABLE_CELL:
/* insert implied table row */
style = xcalloc(1, sizeof(struct css_style));
memcpy(style, row_group->style, sizeof(struct css_style));
css_cascade(style, &css_blank_style);
row = box_create(style, row_group->href, 0,
box_pool);
row->type = BOX_TABLE_ROW;
if (child->prev == 0)
row_group->children = row;
else
child->prev->next = row;
row->prev = child->prev;
while (child != 0 && (
child->type == BOX_BLOCK ||
child->type == BOX_INLINE_CONTAINER ||
child->type == BOX_TABLE ||
child->type == BOX_TABLE_ROW_GROUP ||
child->type == BOX_TABLE_CELL)) {
box_add_child(row, child);
next_child = child->next;
child->next = 0;
child = next_child;
}
row->last->next = 0;
row->next = next_child = child;
if (row->next)
row->next->prev = row;
row->parent = row_group;
box_normalise_table_row(row, row_span,
table_columns, box_pool);
break;
case BOX_INLINE:
case BOX_INLINE_BLOCK:
case BOX_FLOAT_LEFT:
case BOX_FLOAT_RIGHT:
case BOX_BR:
/* should have been wrapped in inline
container by convert_xml_to_box() */
assert(0);
break;
default:
assert(0);
}
}
if (row_group->children == 0) {
LOG(("row_group->children == 0, removing"));
if (row_group->prev == 0)
row_group->parent->children = row_group->next;
else
row_group->prev->next = row_group->next;
if (row_group->next != 0)
row_group->next->prev = row_group->prev;
box_free(row_group);
}
LOG(("row_group %p done", row_group));
}
void box_normalise_table_row(struct box *row,
unsigned int **row_span, unsigned int *table_columns,
pool box_pool)
{
struct box *child;
struct box *next_child;
struct box *cell;
struct css_style *style;
unsigned int columns = 0, i;
assert(row != 0);
assert(row->type == BOX_TABLE_ROW);
LOG(("row %p", row));
for (child = row->children; child != 0; child = next_child) {
next_child = child->next;
switch (child->type) {
case BOX_TABLE_CELL:
/* ok */
box_normalise_block(child, box_pool);
cell = child;
break;
case BOX_BLOCK:
case BOX_INLINE_CONTAINER:
case BOX_TABLE:
case BOX_TABLE_ROW_GROUP:
case BOX_TABLE_ROW:
/* insert implied table cell */
style = xcalloc(1, sizeof(struct css_style));
memcpy(style, row->style, sizeof(struct css_style));
css_cascade(style, &css_blank_style);
cell = box_create(style, row->href, 0, box_pool);
cell->type = BOX_TABLE_CELL;
if (child->prev == 0)
row->children = cell;
else
child->prev->next = cell;
cell->prev = child->prev;
while (child != 0 && (
child->type == BOX_BLOCK ||
child->type == BOX_INLINE_CONTAINER ||
child->type == BOX_TABLE ||
child->type == BOX_TABLE_ROW_GROUP ||
child->type == BOX_TABLE_ROW)) {
box_add_child(cell, child);
next_child = child->next;
child->next = 0;
child = next_child;
}
cell->last->next = 0;
cell->next = next_child = child;
if (cell->next)
cell->next->prev = cell;
cell->parent = row;
box_normalise_block(cell, box_pool);
break;
case BOX_INLINE:
case BOX_INLINE_BLOCK:
case BOX_FLOAT_LEFT:
case BOX_FLOAT_RIGHT:
case BOX_BR:
/* should have been wrapped in inline
container by convert_xml_to_box() */
assert(0);
break;
default:
assert(0);
}
/* skip columns with cells spanning from above */
while ((*row_span)[columns] != 0)
columns++;
cell->start_column = columns;
if (*table_columns < columns + cell->columns) {
*table_columns = columns + cell->columns;
*row_span = xrealloc(*row_span,
sizeof((*row_span)[0]) *
(*table_columns + 1));
(*row_span)[*table_columns] = 0; /* sentinel */
}
for (i = 0; i != cell->columns; i++)
(*row_span)[columns + i] = cell->rows;
columns += cell->columns;
}
for (i = 0; i != *table_columns; i++)
if ((*row_span)[i] != 0)
(*row_span)[i]--;
if (row->children == 0) {
LOG(("row->children == 0, removing"));
if (row->prev == 0)
row->parent->children = row->next;
else
row->prev->next = row->next;
if (row->next != 0)
row->next->prev = row->prev;
box_free(row);
}
LOG(("row %p done", row));
}
void box_normalise_inline_container(struct box *cont, pool box_pool)
{
struct box *child;
struct box *next_child;
assert(cont != 0);
assert(cont->type == BOX_INLINE_CONTAINER);
LOG(("cont %p", cont));
for (child = cont->children; child != 0; child = next_child) {
next_child = child->next;
switch (child->type) {
case BOX_INLINE:
case BOX_BR:
/* ok */
break;
case BOX_INLINE_BLOCK:
/* ok */
box_normalise_block(child, box_pool);
break;
case BOX_FLOAT_LEFT:
case BOX_FLOAT_RIGHT:
/* ok */
assert(child->children != 0);
switch (child->children->type) {
case BOX_BLOCK:
box_normalise_block(child->children,
box_pool);
break;
case BOX_TABLE:
box_normalise_table(child->children,
box_pool);
break;
default:
assert(0);
}
if (child->children == 0) {
/* the child has destroyed itself: remove float */
if (child->prev == 0)
child->parent->children = child->next;
else
child->prev->next = child->next;
if (child->next != 0)
child->next->prev = child->prev;
box_free(child);
}
break;
case BOX_BLOCK:
case BOX_INLINE_CONTAINER:
case BOX_TABLE:
case BOX_TABLE_ROW_GROUP:
case BOX_TABLE_ROW:
case BOX_TABLE_CELL:
default:
assert(0);
}
}
LOG(("cont %p done", cont));
}
/**
* Free a box tree recursively.
*/
void box_free(struct box *box)
{
struct box *child, *next;
/* free children first */
for (child = box->children; child; child = next) {
next = child->next;
box_free(child);
}
/* last this box */
box_free_box(box);
}
/**
* Free a single box structure.
*/
void box_free_box(struct box *box)
{
if (!box->clone) {
if (box->gadget)
form_free_control(box->gadget);
free(box->href);
free(box->title);
free(box->col);
if (!box->style_clone)
free(box->style);
}
free(box->usemap);
free(box->text);
/* TODO: free object_params */
}
/**
* add an object to the box tree
*/
struct box_result box_object(xmlNode *n, struct box_status *status,
struct css_style *style)
{
struct box *box;
struct object_params *po;
struct plugin_params* pp;
char *s, *url = NULL, *map;
xmlNode *c;
box = box_create(style, status->href, 0,
status->content->data.html.box_pool);
po = xcalloc(1, sizeof(*po));
/* initialise po struct */
po->data = 0;
po->type = 0;
po->codetype = 0;
po->codebase = 0;
po->classid = 0;
po->params = 0;
/* object data */
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "data"))) {
url = url_join(s, status->content->data.html.base_url);
if (!url) {
free(po);
xmlFree(s);
return (struct box_result) {box, true, true};
}
po->data = strdup(s);
LOG(("object '%s'", po->data));
xmlFree(s);
}
/* imagemap associated with this object */
if ((map = xmlGetProp(n, (const xmlChar *) "usemap"))) {
if (map[0] == '#') {
box->usemap = xstrdup(map+1);
}
else {
box->usemap = xstrdup(map);
}
xmlFree(map);
}
/* object type */
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "type"))) {
po->type = strdup(s);
LOG(("type: %s", s));
xmlFree(s);
}
/* object codetype */
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "codetype"))) {
po->codetype = strdup(s);
LOG(("codetype: %s", s));
xmlFree(s);
}
/* object codebase */
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "codebase"))) {
po->codebase = strdup(s);
LOG(("codebase: %s", s));
xmlFree(s);
}
/* object classid */
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "classid"))) {
po->classid = strdup(s);
LOG(("classid: %s", s));
xmlFree(s);
}
/* parameters
* parameter data is stored in a singly linked list.
* po->params points to the head of the list.
* new parameters are added to the head of the list.
*/
for (c = n->children; c != 0; c = c->next) {
if (strcmp((const char *) c->name, "param") == 0) {
pp = xcalloc(1, sizeof(*pp));
/* initialise pp struct */
pp->name = 0;
pp->value = 0;
pp->valuetype = 0;
pp->type = 0;
pp->next = 0;
if ((s = (char *) xmlGetProp(c, (const xmlChar *) "name"))) {
pp->name = strdup(s);
xmlFree(s);
}
if ((s = (char *) xmlGetProp(c, (const xmlChar *) "value"))) {
pp->value = strdup(s);
xmlFree(s);
}
if ((s = (char *) xmlGetProp(c, (const xmlChar *) "type"))) {
pp->type = strdup(s);
xmlFree(s);
}
if ((s = (char *) xmlGetProp(c, (const xmlChar *) "valuetype"))) {
pp->valuetype = strdup(s);
xmlFree(s);
}
else {
pp->valuetype = strdup("data");
}
pp->next = po->params;
po->params = pp;
}
else {
/* The first non-param child is the start of the
* alt html. Therefore, we should break out of this loop.
*/
continue;
}
}
box->object_params = po;
/* start fetch */
if (plugin_decode(status->content, url, box, po))
return (struct box_result) {box, false, false};
return (struct box_result) {box, true, false};
}
/**
* add an embed to the box tree
*/
struct box_result box_embed(xmlNode *n, struct box_status *status,
struct css_style *style)
{
struct box *box;
struct object_params *po;
struct plugin_params *pp;
char *s, *url = NULL;
xmlAttr *a;
box = box_create(style, status->href, 0,
status->content->data.html.box_pool);
po = xcalloc(1, sizeof(*po));
/* initialise po struct */
po->data = 0;
po->type = 0;
po->codetype = 0;
po->codebase = 0;
po->classid = 0;
po->params = 0;
/* embed src */
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "src"))) {
url = url_join(s, status->content->data.html.base_url);
if (!url) {
free(po);
xmlFree(s);
return (struct box_result) {box, false, true};
}
LOG(("embed '%s'", url));
po->data = strdup(s);
xmlFree(s);
}
/**
* we munge all other attributes into a plugin_parameter structure
*/
for(a=n->properties; a!=0; a=a->next) {
pp = xcalloc(1, sizeof(*pp));
/* initialise pp struct */
pp->name = 0;
pp->value = 0;
pp->valuetype = 0;
pp->type = 0;
pp->next = 0;
if(strcasecmp((const char*)a->name, "src") != 0) {
pp->name = strdup((const char*)a->name);
pp->value = strdup((char*)a->children->content);
pp->valuetype = strdup("data");
pp->next = po->params;
po->params = pp;
}
}
box->object_params = po;
/* start fetch */
plugin_decode(status->content, url, box, po);
return (struct box_result) {box, false, false};
}
/**
* add an applet to the box tree
*/
struct box_result box_applet(xmlNode *n, struct box_status *status,
struct css_style *style)
{
struct box *box;
struct object_params *po;
struct plugin_params *pp;
char *s, *url = NULL;
xmlNode *c;
box = box_create(style, status->href, 0,
status->content->data.html.box_pool);
po = xcalloc(1, sizeof(*po));
/* initialise po struct */
po->data = 0;
po->type = 0;
po->codetype = 0;
po->codebase = 0;
po->classid = 0;
po->params = 0;
/* code */
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "code"))) {
url = url_join(s, status->content->data.html.base_url);
if (!url) {
free(po);
xmlFree(s);
return (struct box_result) {box, true, false};
}
LOG(("applet '%s'", url));
po->classid = strdup(s);
xmlFree(s);
}
/* object codebase */
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "codebase"))) {
po->codebase = strdup(s);
LOG(("codebase: %s", s));
xmlFree(s);
}
/* parameters
* parameter data is stored in a singly linked list.
* po->params points to the head of the list.
* new parameters are added to the head of the list.
*/
for (c = n->children; c != 0; c = c->next) {
if (strcmp((const char *) c->name, "param") == 0) {
pp = xcalloc(1, sizeof(*pp));
/* initialise pp struct */
pp->name = 0;
pp->value = 0;
pp->valuetype = 0;
pp->type = 0;
pp->next = 0;
if ((s = (char *) xmlGetProp(c, (const xmlChar *) "name"))) {
pp->name = strdup(s);
xmlFree(s);
}
if ((s = (char *) xmlGetProp(c, (const xmlChar *) "value"))) {
pp->value = strdup(s);
xmlFree(s);
}
if ((s = (char *) xmlGetProp(c, (const xmlChar *) "type"))) {
pp->type = strdup(s);
xmlFree(s);
}
if ((s = (char *) xmlGetProp(c, (const xmlChar *) "valuetype"))) {
pp->valuetype = strdup(s);
xmlFree(s);
}
else {
pp->valuetype = strdup("data");
}
pp->next = po->params;
po->params = pp;
}
else {
/* The first non-param child is the start of the
* alt html. Therefore, we should break out of this loop.
*/
continue;
}
}
box->object_params = po;
/* start fetch */
if(plugin_decode(status->content, url, box, po))
return (struct box_result) {box, false, false};
return (struct box_result) {box, true, false};
}
/**
* box_iframe
* add an iframe to the box tree
* TODO - implement GUI nested wimp stuff 'cos this looks naff atm. (16_5)
*/
struct box_result box_iframe(xmlNode *n, struct box_status *status,
struct css_style *style)
{
struct box *box;
struct object_params *po;
char *s, *url = NULL;
box = box_create(style, status->href, 0,
status->content->data.html.box_pool);
po = xcalloc(1, sizeof(*po));
/* initialise po struct */
po->data = 0;
po->type = 0;
po->codetype = 0;
po->codebase = 0;
po->classid = 0;
po->params = 0;
/* iframe src */
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "src"))) {
url = url_join(s, status->content->data.html.base_url);
if (!url) {
free(po);
xmlFree(s);
return (struct box_result) {box, false, true};
}
LOG(("embed '%s'", url));
po->data = strdup(s);
xmlFree(s);
}
box->object_params = po;
/* start fetch */
plugin_decode(status->content, url, box, po);
return (struct box_result) {box, false, false};
}
/**
* plugin_decode
* This function checks that the contents of the plugin_object struct
* are valid. If they are, it initiates the fetch process. If they are
* not, it exits, leaving the box structure as it was on entry. This is
* necessary as there are multiple ways of declaring an object's attributes.
*
* Returns false if the object could not be handled.
*
* TODO: reformat, plug failure leaks
*/
bool plugin_decode(struct content* content, char* url, struct box* box,
struct object_params* po)
{
struct plugin_params * pp;
/* Check if the codebase attribute is defined.
* If it is not, set it to the codebase of the current document.
*/
if(po->codebase == 0)
po->codebase = url_join("./", content->data.html.base_url);
else
po->codebase = url_join(po->codebase, content->data.html.base_url);
if (!po->codebase)
return false;
/* Set basehref */
po->basehref = strdup(content->data.html.base_url);
/* Check that we have some data specified.
* First, check the data attribute.
* Second, check the classid attribute.
* The data attribute takes precedence.
* If neither are specified or if classid begins "clsid:",
* we can't handle this object.
*/
if(po->data == 0 && po->classid == 0) {
return false;
}
if(po->data == 0 && po->classid != 0) {
if(strncasecmp(po->classid, "clsid:", 6) == 0) {
/* Flash */
if(strcasecmp(po->classid, "clsid:D27CDB6E-AE6D-11cf-96B8-444553540000") == 0) {
for(pp = po->params; pp != 0 &&
(strcasecmp(pp->name, "movie") != 0);
pp = pp->next);
if(pp == 0)
return false;
url = url_join(pp->value, po->basehref);
if (!url)
return false;
/* munge the codebase */
po->codebase = url_join("./",
content->data.html.base_url);
if (!po->codebase)
return false;
}
else {
LOG(("ActiveX object - n0"));
return false;
}
}
else {
url = url_join(po->classid, po->codebase);
if (!url)
return false;
/* The java plugin doesn't need the .class extension
* so we strip it.
*/
if(strcasecmp((&po->classid[strlen(po->classid)-6]),
".class") == 0)
po->classid[strlen(po->classid)-6] = 0;
}
}
else {
url = url_join(po->data, po->codebase);
if (!url)
return false;
}
/* Check if the declared mime type is understandable.
* Checks type and codetype attributes.
*/
if(po->type != 0) {
if (content_lookup(po->type) == CONTENT_OTHER)
return false;
}
if(po->codetype != 0) {
if (content_lookup(po->codetype) == CONTENT_OTHER)
return false;
}
/* If we've got to here, the object declaration has provided us with
* enough data to enable us to have a go at downloading and displaying it.
*
* We may still find that the object has a MIME type that we can't handle
* when we fetch it (if the type was not specified or is different to that
* given in the attributes).
*/
html_fetch_object(content, url, box, 0, 1000, 1000, false);
return true;
}
/**
* Find the absolute coordinates of a box.
*
* \param box the box to calculate coordinates of
* \param x updated to x coordinate
* \param y updated to y coordinate
*/
void box_coords(struct box *box, int *x, int *y)
{
*x = box->x;
*y = box->y;
while (box->parent) {
if (box->type == BOX_FLOAT_LEFT ||
box->type == BOX_FLOAT_RIGHT) {
do {
box = box->parent;
} while (!box->float_children);
} else
box = box->parent;
*x += box->x;
*y += box->y;
}
}
struct box_result box_frameset(xmlNode *n, struct box_status *status,
struct css_style *style)
{
unsigned int row, col;
unsigned int rows = 1, cols = 1;
int object_width, object_height;
char *s, *s1, *url;
struct box *box;
struct box *row_box;
struct box *cell_box;
struct box *object_box;
struct css_style *row_style;
struct box_result r;
struct box_multi_length *row_height = 0, *col_width = 0;
xmlNode *c;
box = box_create(style, 0, status->title,
status->content->data.html.box_pool);
box->type = BOX_TABLE;
/* parse rows and columns */
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "rows"))) {
row_height = box_parse_multi_lengths(s, &rows);
xmlFree(s);
if (!row_height) {
box_free_box(box);
return (struct box_result) {0, false, true};
}
}
if ((s = (char *) xmlGetProp(n, (const xmlChar *) "cols"))) {
col_width = box_parse_multi_lengths(s, &cols);
xmlFree(s);
if (!col_width) {
free(row_height);
box_free_box(box);
return (struct box_result) {0, false, true};
}
}
LOG(("rows %u, cols %u", rows, cols));
box->min_width = 1;
box->max_width = 10000;
box->col = malloc(sizeof box->col[0] * cols);
if (!box->col) {
free(row_height);
free(col_width);
box_free_box(box);
return (struct box_result) {0, false, true};
}
if (col_width) {
for (col = 0; col != cols; col++) {
if (col_width[col].type == LENGTH_PX) {
box->col[col].type = COLUMN_WIDTH_FIXED;
box->col[col].width = col_width[col].value;
} else if (col_width[col].type == LENGTH_PERCENT) {
box->col[col].type = COLUMN_WIDTH_PERCENT;
box->col[col].width = col_width[col].value;
} else {
box->col[col].type = COLUMN_WIDTH_RELATIVE;
box->col[col].width = col_width[col].value;
}
box->col[col].min = 1;
box->col[col].max = 10000;
}
} else {
box->col[0].type = COLUMN_WIDTH_RELATIVE;
box->col[0].width = 1;
box->col[0].min = 1;
box->col[0].max = 10000;
}
/* create the frameset table */
c = n->children;
for (row = 0; c && row != rows; row++) {
row_style = malloc(sizeof (struct css_style));
if (!row_style) {
free(row_height);
free(col_width);
return (struct box_result) {box, false, true};
}
memcpy(row_style, style, sizeof (struct css_style));
object_height = 1000; /** \todo get available height */
/* if (row_height) {
row_style->height.height = CSS_HEIGHT_LENGTH;
row_style->height.length.unit = CSS_UNIT_PX;
if (row_height[row].type == LENGTH_PERCENT)
row_style->height.length.value = 1000 *
row_height[row].value / 100;
else if (row_height[row].type == LENGTH_RELATIVE)
row_style->height.length.value = 100 *
row_height[row].value;
else
row_style->height.length.value =
row_height[row].value;
object_height = row_style->height.length.value;
}*/
row_box = box_create(row_style, 0, 0,
status->content->data.html.box_pool);
row_box->type = BOX_TABLE_ROW;
box_add_child(box, row_box);
for (col = 0; c && col != cols; col++) {
while (c && !(c->type == XML_ELEMENT_NODE && (
strcmp((const char *) c->name, "frame") == 0 ||
strcmp((const char *) c->name, "frameset") == 0
)))
c = c->next;
if (!c)
break;
/* estimate frame width */
object_width = status->content->available_width;
if (col_width && col_width[col].type == LENGTH_PX)
object_width = col_width[col].value;
cell_box = box_create(style, 0, 0,
status->content->data.html.box_pool);
cell_box->type = BOX_TABLE_CELL;
cell_box->style_clone = 1;
box_add_child(row_box, cell_box);
if (strcmp((const char *) c->name, "frameset") == 0) {
LOG(("frameset"));
r = box_frameset(c, status, style);
if (r.memory_error) {
box_free(box);
free(row_height);
free(col_width);
return (struct box_result) {0, false,
true};
}
r.box->style_clone = 1;
box_add_child(cell_box, r.box);
c = c->next;
continue;
}
object_box = box_create(style, 0, 0,
status->content->data.html.box_pool);
object_box->type = BOX_BLOCK;
object_box->style_clone = 1;
box_add_child(cell_box, object_box);
if (!(s = (char *) xmlGetProp(c,
(const xmlChar *) "src"))) {
c = c->next;
continue;
}
s1 = strip(s);
url = url_join(s1, status->content->data.html.base_url);
if (!url) {
xmlFree(s);
c = c->next;
continue;
}
LOG(("frame, url '%s'", url));
html_fetch_object(status->content, url, object_box, 0,
object_width, object_height, false);
xmlFree(s);
c = c->next;
}
}
free(row_height);
free(col_width);
style->width.width = CSS_WIDTH_PERCENT;
style->width.value.percent = 100;
return (struct box_result) {box, false, false};
}
/**
* Parse a multi-length-list, as defined by HTML 4.01.
*
* \param s string to parse
* \param count updated to number of entries
* \return array of struct box_multi_length, or 0 on memory exhaustion
*/
struct box_multi_length *box_parse_multi_lengths(const char *s,
unsigned int *count)
{
char *end;
unsigned int i, n = 1;
struct box_multi_length *length;
for (i = 0; s[i]; i++)
if (s[i] == ',')
n++;
length = malloc(sizeof *length * n);
if (!length)
return 0;
for (i = 0; i != n; i++) {
while (isspace(*s))
s++;
length[i].value = strtof(s, &end);
if (length[i].value <= 0)
length[i].value = 1;
s = end;
switch (*s) {
case '%': length[i].type = LENGTH_PERCENT; break;
case '*': length[i].type = LENGTH_RELATIVE; break;
default: length[i].type = LENGTH_PX; break;
}
while (*s && *s != ',')
s++;
if (*s == ',')
s++;
}
*count = n;
return length;
}
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