renderer.c

来自「一个很有名的浏览器」· C语言 代码 · 共 590 行 · 第 1/2 页

		assert(vs->doc_view->vs == vs);
		vs->doc_view->used = 0; /* A bit risky, but... */
		vs->doc_view->vs = NULL;
		vs->doc_view = NULL;
#ifdef CONFIG_ECMASCRIPT
		vs->ecmascript_fragile = 1; /* And is this good? ;-) */
#endif
	}
#endif
	vs->doc_view = doc_view;

	cached = find_in_cache(vs->uri);
	if (!cached) {
		INTERNAL("document %s to format not found", struri(vs->uri));
		return;
	}

	document = get_cached_document(cached, options);
	if (document) {
		doc_view->document = document;
	} else {
		document = init_document(cached, options);
		if (!document) return;
		doc_view->document = document;

		shrink_memory(0);

		render_encoded_document(cached, document);
		sort_links(document);
		if (!document->title) {
			enum uri_component components;

			if (document->uri->protocol == PROTOCOL_FILE) {
				components = URI_PATH;
			} else {
				components = URI_PUBLIC;
			}

			document->title = get_uri_string(document->uri, components);
			if (document->title)
				decode_uri_for_display(document->title);
		}

#ifdef CONFIG_CSS
		document->css_magic = get_document_css_magic(document);
#endif
	}
#ifdef CONFIG_ECMASCRIPT
	if (!vs->ecmascript_fragile)
		assert(vs->ecmascript);
	if (!options->gradual_rerendering) {
		/* We also reset the state if the underlying document changed
		 * from the last time we did the snippets. This may be
		 * triggered i.e. when redrawing a document which has been
		 * reloaded in a different tab meanwhile (OTOH we don't want
		 * to reset the state if we are redrawing a document we have
		 * already drawn before).
		 *
		 * (vs->ecmascript->onload_snippets_owner) check may be
		 * superfluous since we should always have
		 * vs->ecmascript_fragile set in those cases; that's why we
		 * don't ever bother to re-zero it if we are suddenly doing
		 * gradual rendering again.
		 *
		 * XXX: What happens if a document is still loading in the
		 * other tab when we press ^L here? */
		if (vs->ecmascript_fragile
		    || (vs->ecmascript && vs->ecmascript->onload_snippets_owner
		       && document->id != vs->ecmascript->onload_snippets_owner))
			ecmascript_reset_state(vs);
		assert(vs->ecmascript);
		vs->ecmascript->onload_snippets_owner = document->id;

		/* Passing of the onload_snippets pointers gives *_snippets()
		 * some feeling of universality, shall we ever get any other
		 * 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 *a = parse_header(part, "Content-Type", &part);

		if (!a) break;

		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);
}