mirror of
https://github.com/rkd77/elinks.git
synced 2024-11-04 08:17:17 -05:00
599 lines
17 KiB
C
599 lines
17 KiB
C
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/* HTML renderer */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <ctype.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include "elinks.h"
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#include "cache/cache.h"
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#include "config/options.h"
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#include "document/document.h"
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#include "document/dom/renderer.h"
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#include "document/html/frames.h"
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#include "document/html/renderer.h"
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#include "document/plain/renderer.h"
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#include "document/renderer.h"
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#include "document/view.h"
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#include "ecmascript/ecmascript.h"
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#include "encoding/encoding.h"
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#include "intl/charsets.h"
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#include "main/main.h"
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#include "main/object.h"
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#include "protocol/header.h"
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#include "protocol/protocol.h"
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#include "protocol/uri.h"
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#include "session/location.h"
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#include "session/session.h"
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#include "terminal/terminal.h"
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#include "terminal/window.h"
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#include "util/error.h"
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#include "util/memory.h"
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#include "util/string.h"
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#include "viewer/text/view.h"
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#include "viewer/text/vs.h"
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static void sort_links(struct document *document);
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#ifdef CONFIG_ECMASCRIPT
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/* XXX: This function is de facto obsolete, since we do not need to copy
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* snippets around anymore (we process them in one go after the document is
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* loaded; gradual processing was practically impossible because the snippets
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* could reorder randomly during the loading - consider i.e.
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* <body onLoad><script></body>: first just <body> is loaded, but then the
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* rest of the document is loaded and <script> gets before <body>; do not even
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* imagine the trouble with rewritten (through scripting hooks) documents;
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* besides, implementing document.write() will be much simpler).
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* But I want to take no risk by reworking that now. --pasky */
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static void
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add_snippets(struct ecmascript_interpreter *interpreter,
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struct list_head *doc_snippets, struct list_head *queued_snippets)
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{
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struct string_list_item *doc_current = doc_snippets->next;
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#ifdef CONFIG_LEDS
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if (list_empty(*queued_snippets) && interpreter->vs->doc_view->session)
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unset_led_value(interpreter->vs->doc_view->session->status.ecmascript_led);
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#endif
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if (list_empty(*doc_snippets) || !get_opt_bool("ecmascript.enable"))
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return;
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/* We do this all only once per view_state now. */
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if (!list_empty(*queued_snippets)) {
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/* So if we already did it, we shouldn't need to do it again.
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* This is the case of moving around in history - we have all
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* what happenned recorded in the view_state and needn't bother
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* again. */
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#ifdef CONFIG_DEBUG
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/* Hopefully. */
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struct string_list_item *iterator = queued_snippets->next;
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while (iterator != (struct string_list_item *) queued_snippets) {
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if (doc_current == (struct string_list_item *) doc_snippets) {
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INTERNAL("add_snippets(): doc_snippets shorter than queued_snippets!");
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return;
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}
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#if 0
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DBG("Comparing snippets\n%.*s\n###### vs #####\n%.*s\n #####",
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iterator->string.length, iterator->string.source,
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doc_current->string.length, doc_current->string.source);
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#endif
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assert(!strlcmp(iterator->string.source,
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iterator->string.length,
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doc_current->string.source,
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doc_current->string.length));
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doc_current = doc_current->next;
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iterator = iterator->next;
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}
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#endif
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return;
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}
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assert(doc_current);
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for (; doc_current != (struct string_list_item *) doc_snippets;
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doc_current = doc_current->next) {
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add_to_string_list(queued_snippets, doc_current->string.source,
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doc_current->string.length);
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#if 0
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DBG("Adding snippet\n%.*s\n #####",
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doc_current->string.length,
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doc_current->string.source);
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#endif
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}
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}
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static void
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process_snippets(struct ecmascript_interpreter *interpreter,
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struct list_head *snippets, struct string_list_item **current)
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{
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if (!*current)
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*current = snippets->next;
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for (; *current != (struct string_list_item *) snippets;
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(*current) = (*current)->next) {
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struct string *string = &(*current)->string;
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unsigned char *uristring;
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struct uri *uri;
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struct cache_entry *cached;
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struct fragment *fragment;
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if (string->length == 0)
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continue;
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if (*string->source != '^') {
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/* Evaluate <script>code</script> snippet */
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ecmascript_eval(interpreter, string);
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continue;
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}
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/* Eval external <script src="reference"></script> snippet */
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uristring = string->source + 1;
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if (!*uristring) continue;
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uri = get_uri(uristring, URI_BASE);
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if (!uri) continue;
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cached = get_redirected_cache_entry(uri);
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done_uri(uri);
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if (!cached) {
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/* At this time (!gradual_rerendering), we should've
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* already retrieved this though. So it must've been
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* that it went away because unused and the cache was
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* already too full. */
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#if 0
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/* Disabled because gradual rerendering can be triggered
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* by numerous events other than a ecmascript reference
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* completing like the original document and CSS. Problem
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* is that we should never continue this loop but rather
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* break out if that is the case. Somehow we need to
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* be able to derive URI loading problems at this point
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* or maybe remove reference snippets if they fail to load.
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*
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* This FIFO queue handling should be used for also CSS
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* imports so it would be cool if it could be general
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* enough for that. Using it for frames with the FIFOing
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* disabled probably wouldn't hurt either.
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*
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* To top this thing off it would be nice if it also
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* handled dependency tracking between references so that
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* CSS documents will not disappear from the cache
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* before all referencing HTML documents has been deleted
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* from it.
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*
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* Reported as bug 533. */
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/* Pasky's explanation: If we get the doc in a single
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* shot, before calling draw_formatted() we didn't have
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* anything additional queued for loading and the cache
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* entry was already loaded, so we didn't get
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* gradual_loading set. But then while parsing the
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* document we got some external references and trying
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* to process them right now. Boom.
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*
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* The obvious solution would be to always call
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* draw_formatted() with gradual_loading in
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* doc_loading_callback() and if we are sure the
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* loading is really over, call it one more time
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* without gradual_loading set. I'm not sure about
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* the implications though so I won't do it before
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* 0.10.0. --pasky */
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ERROR("The script of %s was lost in too full a cache!",
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uristring);
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#endif
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continue;
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}
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fragment = get_cache_fragment(cached);
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if (fragment) {
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struct string code = INIT_STRING(fragment->data, fragment->length);
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ecmascript_eval(interpreter, &code);
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}
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}
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}
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#endif
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static void
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render_encoded_document(struct cache_entry *cached, struct document *document)
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{
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struct uri *uri = cached->uri;
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enum stream_encoding encoding = ENCODING_NONE;
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unsigned char *extension;
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struct fragment *fragment = get_cache_fragment(cached);
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struct string buffer = INIT_STRING("", 0);
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/* Even empty documents have to be rendered so that info in the protocol
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* header, such as refresh info, get processed. (bug 625) */
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if (fragment) {
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buffer.source = fragment->data;
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buffer.length = fragment->length;
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}
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extension = get_extension_from_uri(uri);
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if (extension) {
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encoding = guess_encoding(extension);
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mem_free(extension);
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}
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if (encoding != ENCODING_NONE) {
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int length = 0;
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unsigned char *source;
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source = decode_encoded_buffer(encoding, buffer.source,
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buffer.length, &length);
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if (source) {
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buffer.source = source;
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buffer.length = length;
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} else {
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encoding = ENCODING_NONE;
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}
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}
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if (document->options.plain) {
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#ifdef CONFIG_DOM
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if (cached->content_type
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&& !strlcasecmp("text/html", 9, cached->content_type, -1))
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render_dom_document(cached, document, &buffer);
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else
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#endif
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render_plain_document(cached, document, &buffer);
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} else {
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render_html_document(cached, document, &buffer);
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}
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if (encoding != ENCODING_NONE) {
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done_string(&buffer);
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}
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}
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void
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render_document(struct view_state *vs, struct document_view *doc_view,
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struct document_options *options)
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{
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unsigned char *name;
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struct document *document;
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struct cache_entry *cached;
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assert(vs && doc_view && options);
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if_assert_failed return;
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#if 0
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DBG("(Re%u)Rendering %s on doc_view %p [%s] while attaching it to %p",
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options->gradual_rerendering, struri(vs->uri),
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doc_view, doc_view->name, vs);
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#endif
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name = doc_view->name;
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doc_view->name = NULL;
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detach_formatted(doc_view);
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doc_view->name = name;
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doc_view->vs = vs;
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doc_view->last_x = doc_view->last_y = -1;
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#if 0
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/* This is a nice idea, but doesn't always work: in particular when
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* there's a frame name conflict. You loaded something to the vs'
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* frame, but later something tried to get loaded to a frame with
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* the same name and we got back this frame again, so we are now
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* overriding the original document with a cuckoo. This assert()ion
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* should be re-enabled when we start to get this right (which is
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* very complex, but someone should rewrite the frames support
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* anyway). --pasky */
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assert(!vs->doc_view);
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#else
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if (vs->doc_view) {
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/* It will be still detached, no worries - hopefully it still
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* resides in ses->scrn_frames. */
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assert(vs->doc_view->vs == vs);
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vs->doc_view->used = 0; /* A bit risky, but... */
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vs->doc_view->vs = NULL;
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vs->doc_view = NULL;
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#ifdef CONFIG_ECMASCRIPT
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vs->ecmascript_fragile = 1; /* And is this good? ;-) */
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#endif
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}
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#endif
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vs->doc_view = doc_view;
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cached = find_in_cache(vs->uri);
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if (!cached) {
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INTERNAL("document %s to format not found", struri(vs->uri));
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return;
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}
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document = get_cached_document(cached, options);
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if (document) {
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doc_view->document = document;
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} else {
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document = init_document(cached, options);
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if (!document) return;
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doc_view->document = document;
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shrink_memory(0);
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render_encoded_document(cached, document);
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sort_links(document);
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if (!document->title) {
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enum uri_component components;
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if (document->uri->protocol == PROTOCOL_FILE) {
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components = URI_PATH;
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} else {
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components = URI_PUBLIC;
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}
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document->title = get_uri_string(document->uri, components);
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if (document->title)
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decode_uri_for_display(document->title);
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}
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#ifdef CONFIG_CSS
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document->css_magic = get_document_css_magic(document);
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#endif
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}
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#ifdef CONFIG_ECMASCRIPT
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if (!vs->ecmascript_fragile)
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assert(vs->ecmascript);
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if (!options->gradual_rerendering) {
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/* We also reset the state if the underlying document changed
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* from the last time we did the snippets. This may be
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* triggered i.e. when redrawing a document which has been
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* reloaded in a different tab meanwhile (OTOH we don't want
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* to reset the state if we are redrawing a document we have
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* already drawn before).
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*
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* (vs->ecmascript->onload_snippets_owner) check may be
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* superfluous since we should always have
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* vs->ecmascript_fragile set in those cases; that's why we
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* don't ever bother to re-zero it if we are suddenly doing
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* gradual rendering again.
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*
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* XXX: What happens if a document is still loading in the
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* other tab when we press ^L here? */
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if (vs->ecmascript_fragile
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|| (vs->ecmascript && vs->ecmascript->onload_snippets_owner
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&& document->id != vs->ecmascript->onload_snippets_owner))
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ecmascript_reset_state(vs);
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assert(vs->ecmascript);
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vs->ecmascript->onload_snippets_owner = document->id;
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/* Passing of the onload_snippets pointers gives *_snippets()
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* some feeling of universality, shall we ever get any other
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|
|
* snippets (?). */
|
||
|
|
add_snippets(vs->ecmascript,
|
||
|
|
&document->onload_snippets,
|
||
|
|
&vs->ecmascript->onload_snippets);
|
||
|
|
process_snippets(vs->ecmascript, &vs->ecmascript->onload_snippets,
|
||
|
|
&vs->ecmascript->current_onload_snippet);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* If we do not care about the height and width of the document
|
||
|
|
* just use the setup values. */
|
||
|
|
|
||
|
|
copy_box(&doc_view->box, &document->options.box);
|
||
|
|
|
||
|
|
if (!document->options.needs_width)
|
||
|
|
doc_view->box.width = options->box.width;
|
||
|
|
|
||
|
|
if (!document->options.needs_height)
|
||
|
|
doc_view->box.height = options->box.height;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void
|
||
|
|
render_document_frames(struct session *ses, int no_cache)
|
||
|
|
{
|
||
|
|
struct document_options doc_opts;
|
||
|
|
struct document_view *doc_view;
|
||
|
|
struct document_view *current_doc_view = NULL;
|
||
|
|
struct view_state *vs = NULL;
|
||
|
|
|
||
|
|
if (!ses->doc_view) {
|
||
|
|
ses->doc_view = mem_calloc(1, sizeof(*ses->doc_view));
|
||
|
|
if (!ses->doc_view) return;
|
||
|
|
ses->doc_view->session = ses;
|
||
|
|
ses->doc_view->search_word = &ses->search_word;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (have_location(ses)) vs = &cur_loc(ses)->vs;
|
||
|
|
|
||
|
|
init_document_options(&doc_opts);
|
||
|
|
|
||
|
|
set_box(&doc_opts.box, 0, 0,
|
||
|
|
ses->tab->term->width, ses->tab->term->height);
|
||
|
|
|
||
|
|
if (ses->status.show_title_bar) {
|
||
|
|
doc_opts.box.y++;
|
||
|
|
doc_opts.box.height--;
|
||
|
|
}
|
||
|
|
if (ses->status.show_status_bar) doc_opts.box.height--;
|
||
|
|
if (ses->status.show_tabs_bar) doc_opts.box.height--;
|
||
|
|
|
||
|
|
doc_opts.color_mode = get_opt_int_tree(ses->tab->term->spec, "colors");
|
||
|
|
if (!get_opt_bool_tree(ses->tab->term->spec, "underline"))
|
||
|
|
doc_opts.color_flags |= COLOR_ENHANCE_UNDERLINE;
|
||
|
|
|
||
|
|
doc_opts.cp = get_opt_codepage_tree(ses->tab->term->spec, "charset");
|
||
|
|
doc_opts.no_cache = no_cache & 1;
|
||
|
|
doc_opts.gradual_rerendering = !!(no_cache & 2);
|
||
|
|
|
||
|
|
if (vs) {
|
||
|
|
if (vs->plain < 0) vs->plain = 0;
|
||
|
|
doc_opts.plain = vs->plain;
|
||
|
|
doc_opts.wrap = vs->wrap;
|
||
|
|
} else {
|
||
|
|
doc_opts.plain = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach (doc_view, ses->scrn_frames) doc_view->used = 0;
|
||
|
|
|
||
|
|
if (vs) render_document(vs, ses->doc_view, &doc_opts);
|
||
|
|
|
||
|
|
if (document_has_frames(ses->doc_view->document)) {
|
||
|
|
current_doc_view = current_frame(ses);
|
||
|
|
format_frames(ses, ses->doc_view->document->frame_desc, &doc_opts, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach (doc_view, ses->scrn_frames) {
|
||
|
|
struct document_view *prev_doc_view = doc_view->prev;
|
||
|
|
|
||
|
|
if (doc_view->used) continue;
|
||
|
|
|
||
|
|
detach_formatted(doc_view);
|
||
|
|
del_from_list(doc_view);
|
||
|
|
mem_free(doc_view);
|
||
|
|
doc_view = prev_doc_view;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (current_doc_view) {
|
||
|
|
int n = 0;
|
||
|
|
|
||
|
|
foreach (doc_view, ses->scrn_frames) {
|
||
|
|
if (document_has_frames(doc_view->document)) continue;
|
||
|
|
if (doc_view == current_doc_view) {
|
||
|
|
cur_loc(ses)->vs.current_link = n;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
n++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
comp_links(struct link *l1, struct link *l2)
|
||
|
|
{
|
||
|
|
assert(l1 && l2);
|
||
|
|
if_assert_failed return 0;
|
||
|
|
return (l1->number - l2->number);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
sort_links(struct document *document)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
assert(document);
|
||
|
|
if_assert_failed return;
|
||
|
|
if (!document->nlinks) return;
|
||
|
|
|
||
|
|
assert(document->links);
|
||
|
|
if_assert_failed return;
|
||
|
|
|
||
|
|
qsort(document->links, document->nlinks, sizeof(*document->links),
|
||
|
|
(void *) comp_links);
|
||
|
|
|
||
|
|
if (!document->height) return;
|
||
|
|
|
||
|
|
document->lines1 = mem_calloc(document->height, sizeof(*document->lines1));
|
||
|
|
if (!document->lines1) return;
|
||
|
|
document->lines2 = mem_calloc(document->height, sizeof(*document->lines2));
|
||
|
|
if (!document->lines2) {
|
||
|
|
mem_free(document->lines1);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < document->nlinks; i++) {
|
||
|
|
struct link *link = &document->links[i];
|
||
|
|
int p, q, j;
|
||
|
|
|
||
|
|
if (!link->npoints) {
|
||
|
|
done_link_members(link);
|
||
|
|
memmove(link, link + 1,
|
||
|
|
(document->nlinks - i - 1) * sizeof(*link));
|
||
|
|
document->nlinks--;
|
||
|
|
i--;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
p = link->points[0].y;
|
||
|
|
q = link->points[link->npoints - 1].y;
|
||
|
|
if (p > q) j = p, p = q, q = j;
|
||
|
|
for (j = p; j <= q; j++) {
|
||
|
|
assertm(j < document->height, "link out of screen");
|
||
|
|
if_assert_failed continue;
|
||
|
|
document->lines2[j] = &document->links[i];
|
||
|
|
if (!document->lines1[j])
|
||
|
|
document->lines1[j] = &document->links[i];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
struct conv_table *
|
||
|
|
get_convert_table(unsigned char *head, int to_cp,
|
||
|
|
int default_cp, int *from_cp,
|
||
|
|
enum cp_status *cp_status, int ignore_server_cp)
|
||
|
|
{
|
||
|
|
unsigned char *part = head;
|
||
|
|
int cp_index = -1;
|
||
|
|
|
||
|
|
assert(head);
|
||
|
|
if_assert_failed return NULL;
|
||
|
|
|
||
|
|
if (ignore_server_cp) {
|
||
|
|
if (cp_status) *cp_status = CP_STATUS_IGNORED;
|
||
|
|
if (from_cp) *from_cp = default_cp;
|
||
|
|
return get_translation_table(default_cp, to_cp);
|
||
|
|
}
|
||
|
|
|
||
|
|
while (cp_index == -1) {
|
||
|
|
unsigned char *ct_charset;
|
||
|
|
unsigned char *meta;
|
||
|
|
unsigned char *a = parse_header(part, "Content-Type", &part);
|
||
|
|
|
||
|
|
if (!a) break;
|
||
|
|
/* Content type info from document meta header.
|
||
|
|
* scan_http_equiv() appends the meta stuff to the protocol header before
|
||
|
|
* this function is called. Last Content-Type header field is used. */
|
||
|
|
|
||
|
|
while ((meta = parse_header(part, "Content-Type", &part))) {
|
||
|
|
mem_free_set(&a, meta);
|
||
|
|
}
|
||
|
|
|
||
|
|
ct_charset = parse_header_param(a, "charset");
|
||
|
|
if (ct_charset) {
|
||
|
|
cp_index = get_cp_index(ct_charset);
|
||
|
|
mem_free(ct_charset);
|
||
|
|
}
|
||
|
|
mem_free(a);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (cp_index == -1) {
|
||
|
|
unsigned char *a = parse_header(head, "Content-Charset", NULL);
|
||
|
|
|
||
|
|
if (a) {
|
||
|
|
cp_index = get_cp_index(a);
|
||
|
|
mem_free(a);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (cp_index == -1) {
|
||
|
|
unsigned char *a = parse_header(head, "Charset", NULL);
|
||
|
|
|
||
|
|
if (a) {
|
||
|
|
cp_index = get_cp_index(a);
|
||
|
|
mem_free(a);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (cp_index == -1) {
|
||
|
|
cp_index = default_cp;
|
||
|
|
if (cp_status) *cp_status = CP_STATUS_ASSUMED;
|
||
|
|
} else {
|
||
|
|
if (cp_status) *cp_status = CP_STATUS_SERVER;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (from_cp) *from_cp = cp_index;
|
||
|
|
|
||
|
|
return get_translation_table(cp_index, to_cp);
|
||
|
|
}
|