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Turn the DOM tree renderer into a debug module

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Define DOM_TREE_RENDERER and run as:

	ELINKS_LOG=/tmp/dom-dump.txt ./elinks -no-connect <url>

to have a trace of DOM tree dumped into a file.
This commit is contained in:
Jonas Fonseca 2005-12-21 14:41:28 +01:00 committed by Jonas Fonseca
parent fe6637dd7d
commit d6c5640f29
1 changed files with 36 additions and 56 deletions
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78
src/document/dom/renderer.c
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@ -286,35 +286,6 @@ render_dom_text(struct dom_renderer *renderer, struct screen_char *template,
}
}
/*#define DOM_TREE_RENDERER*/
#ifdef DOM_TREE_RENDERER
static void
render_dom_printf(struct dom_renderer *renderer, struct screen_char *template,
unsigned char *format, ...)
{
unsigned char *text;
int textlen;
va_list ap, ap2;
va_start(ap, format);
VA_COPY(ap2, ap);
textlen = vsnprintf(NULL, 0, format, ap2);
text = mem_alloc(textlen + 1);
if (!text) goto free_va_args;
if (vsnprintf((char *) text, textlen + 1, format, ap) == textlen)
render_dom_text(renderer, template, text, textlen);
mem_free(text);
free_va_args:
va_end(ap);
}
#endif /* DOM_TREE_RENDERER */
#define realloc_document_links(doc, size) \
ALIGN_LINK(&(doc)->links, (doc)->nlinks, size)
@ -384,7 +355,12 @@ add_dom_link(struct dom_renderer *renderer, unsigned char *string, int length)
}
/* DOM Tree Renderer */
/* DOM Tree Debug Renderer */
/* Define to have debug info about the nodes added printed to the log.
* Run as: ELINKS_LOG=/tmp/dom-dump.txt ./elinks -no-connect <url>
* to have the debug dumped into a file. */
/*#define DOM_TREE_RENDERER*/
#ifdef DOM_TREE_RENDERER
static inline unsigned char *
@ -419,11 +395,14 @@ set_enhanced_dom_node_value(struct dom_string *string, struct dom_node *node,
assert(node);
memset(string, 0, sizeof(*string));
switch (node->type) {
case DOM_NODE_ENTITY_REFERENCE:
string->string = get_entity_string(node->string.string,
node->string.length,
codepage);
string->string = null_or_stracpy(string->string);
break;
default:
@ -439,19 +418,21 @@ set_enhanced_dom_node_value(struct dom_string *string, struct dom_node *node,
string->length = string->string ? strlen(string->string) : 0;
}
static unsigned char indent_string[MAX_STR_LEN];
#define get_indent_offset(stack) \
((stack)->depth < sizeof(indent_string)/2 ? (stack)->depth * 2 : sizeof(indent_string))
static void
render_dom_tree(struct dom_stack *stack, struct dom_node *node, void *data)
{
struct dom_renderer *renderer = stack->current->data;
struct screen_char *template = &renderer->styles[node->type];
struct dom_string *value = &node->string;
struct dom_string *name = get_dom_node_name(node);
render_dom_printf(renderer, template, "%.*s: %.*s\n",
LOG_INFO("%.*s %.*s: %.*s",
get_indent_offset(stack), indent_string,
name->length, name->string,
value->length, value->string);
mem_free_if(name);
}
static void
@ -459,7 +440,6 @@ render_dom_tree_id_leaf(struct dom_stack *stack, struct dom_node *node, void *da
{
struct dom_renderer *renderer = stack->current->data;
struct document *document = renderer->document;
struct screen_char *template = &renderer->styles[node->type];
struct dom_string value;
struct dom_string *name;
struct dom_string *id;
@ -470,8 +450,8 @@ render_dom_tree_id_leaf(struct dom_stack *stack, struct dom_node *node, void *da
id = get_dom_node_type_name(node->type);
set_enhanced_dom_node_value(&value, node, document->options.cp);
renderer->canvas_x += stack->depth;
render_dom_printf(renderer, template, "%.*s: %.*s -> %.*s\n",
LOG_INFO("%.*s %.*s: %.*s -> %.*s",
get_indent_offset(stack), indent_string,
id->length, id->string, name->length, name->string,
value.length, value.string);
@ -484,7 +464,6 @@ render_dom_tree_leaf(struct dom_stack *stack, struct dom_node *node, void *data)
{
struct dom_renderer *renderer = stack->current->data;
struct document *document = renderer->document;
struct screen_char *template = &renderer->styles[node->type];
struct dom_string *name;
struct dom_string value;
@ -493,8 +472,8 @@ render_dom_tree_leaf(struct dom_stack *stack, struct dom_node *node, void *data)
name = get_dom_node_name(node);
set_enhanced_dom_node_value(&value, node, document->options.cp);
renderer->canvas_x += stack->depth;
render_dom_printf(renderer, template, "%.*s: %.*s\n",
LOG_INFO("%.*s %.*s: %.*s",
get_indent_offset(stack), indent_string,
name->length, name->string,
value.length, value.string);
@ -505,22 +484,17 @@ render_dom_tree_leaf(struct dom_stack *stack, struct dom_node *node, void *data)
static void
render_dom_tree_branch(struct dom_stack *stack, struct dom_node *node, void *data)
{
struct dom_renderer *renderer = stack->current->data;
struct document *document = renderer->document;
struct screen_char *template = &renderer->styles[node->type];
struct dom_string *name;
struct dom_string *id;
assert(node && document);
assert(node);
name = get_dom_node_name(node);
id = get_dom_node_type_name(node->type);
renderer->canvas_x += stack->depth;
render_dom_printf(renderer, template, "%.*s: %.*s\n",
LOG_INFO("%.*s %.*s: %.*s",
get_indent_offset(stack), indent_string,
id->length, id->string, name->length, name->string);
mem_free_if(name);
}
static struct dom_stack_context_info dom_tree_renderer_context_info = {
@ -816,6 +790,12 @@ render_dom_document(struct cache_entry *cached, struct document *document,
add_dom_stack_context(&parser->stack, &renderer,
&dom_source_renderer_context_info);
#ifdef DOM_TREE_RENDERER
memset(indent_string, ' ', sizeof(indent_string));
add_dom_stack_context(&parser->stack, &renderer,
&dom_tree_renderer_context_info);
#endif
root = parse_sgml(parser, buffer);
done_sgml_parser(parser);
if (!root) return;