/* HTML renderer */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include "elinks.h" #include "cache/cache.h" #include "config/options.h" #include "document/document.h" #include "document/dom/renderer.h" #include "document/html/frames.h" #include "document/html/renderer.h" #include "document/plain/renderer.h" #include "document/renderer.h" #include "document/view.h" #include "ecmascript/ecmascript.h" #include "encoding/encoding.h" #include "intl/charsets.h" #include "main/main.h" #include "main/object.h" #include "protocol/header.h" #include "protocol/protocol.h" #include "protocol/uri.h" #include "session/location.h" #include "session/session.h" #include "terminal/terminal.h" #include "terminal/window.h" #include "util/error.h" #include "util/memory.h" #include "util/string.h" #include "viewer/text/view.h" #include "viewer/text/vs.h" static void sort_links(struct document *document); #ifdef CONFIG_ECMASCRIPT /* XXX: This function is de facto obsolete, since we do not need to copy * snippets around anymore (we process them in one go after the document is * loaded; gradual processing was practically impossible because the snippets * could reorder randomly during the loading - consider i.e. * snippet */ ecmascript_eval(interpreter, string); continue; } /* Eval external snippet */ uristring = string->source + 1; if (!*uristring) continue; uri = get_uri(uristring, URI_BASE); if (!uri) continue; cached = get_redirected_cache_entry(uri); done_uri(uri); if (!cached) { /* At this time (!gradual_rerendering), we should've * already retrieved this though. So it must've been * that it went away because unused and the cache was * already too full. */ #if 0 /* Disabled because gradual rerendering can be triggered * by numerous events other than a ecmascript reference * completing like the original document and CSS. Problem * is that we should never continue this loop but rather * break out if that is the case. Somehow we need to * be able to derive URI loading problems at this point * or maybe remove reference snippets if they fail to load. * * This FIFO queue handling should be used for also CSS * imports so it would be cool if it could be general * enough for that. Using it for frames with the FIFOing * disabled probably wouldn't hurt either. * * To top this thing off it would be nice if it also * handled dependency tracking between references so that * CSS documents will not disappear from the cache * before all referencing HTML documents has been deleted * from it. * * Reported as bug 533. */ /* Pasky's explanation: If we get the doc in a single * shot, before calling draw_formatted() we didn't have * anything additional queued for loading and the cache * entry was already loaded, so we didn't get * gradual_loading set. But then while parsing the * document we got some external references and trying * to process them right now. Boom. * * The obvious solution would be to always call * draw_formatted() with gradual_loading in * doc_loading_callback() and if we are sure the * loading is really over, call it one more time * without gradual_loading set. I'm not sure about * the implications though so I won't do it before * 0.10.0. --pasky */ ERROR("The script of %s was lost in too full a cache!", uristring); #endif continue; } fragment = get_cache_fragment(cached); if (fragment) { struct string code = INIT_STRING(fragment->data, fragment->length); ecmascript_eval(interpreter, &code); } } } #endif static void render_encoded_document(struct cache_entry *cached, struct document *document) { struct uri *uri = cached->uri; enum stream_encoding encoding = ENCODING_NONE; struct fragment *fragment = get_cache_fragment(cached); struct string buffer = INIT_STRING("", 0); /* Even empty documents have to be rendered so that info in the protocol * header, such as refresh info, get processed. (bug 625) */ if (fragment) { buffer.source = fragment->data; buffer.length = fragment->length; } if (uri->protocol != PROTOCOL_FILE) { unsigned char *extension = get_extension_from_uri(uri); if (extension) { encoding = guess_encoding(extension); mem_free(extension); } if (encoding != ENCODING_NONE) { int length = 0; unsigned char *source; source = decode_encoded_buffer(encoding, buffer.source, buffer.length, &length); if (source) { buffer.source = source; buffer.length = length; } else { encoding = ENCODING_NONE; } } } if (document->options.plain) { #ifdef CONFIG_DOM if (cached->content_type && (!c_strcasecmp("text/html", cached->content_type) || !c_strcasecmp("application/xhtml+xml", cached->content_type) || !c_strcasecmp("application/rss+xml", cached->content_type) || !c_strcasecmp("application/xbel+xml", cached->content_type) || !c_strcasecmp("application/x-xbel", cached->content_type) || !c_strcasecmp("application/xbel", cached->content_type))) render_dom_document(cached, document, &buffer); else #endif render_plain_document(cached, document, &buffer); } else { render_html_document(cached, document, &buffer); } if (encoding != ENCODING_NONE) { done_string(&buffer); } } void render_document(struct view_state *vs, struct document_view *doc_view, struct document_options *options) { unsigned char *name; struct document *document; struct cache_entry *cached; assert(vs && doc_view && options); if_assert_failed return; #if 0 DBG("(Re%u)Rendering %s on doc_view %p [%s] while attaching it to %p", options->gradual_rerendering, struri(vs->uri), doc_view, doc_view->name, vs); #endif name = doc_view->name; doc_view->name = NULL; detach_formatted(doc_view); doc_view->name = name; doc_view->vs = vs; doc_view->last_x = doc_view->last_y = -1; #if 0 /* This is a nice idea, but doesn't always work: in particular when * there's a frame name conflict. You loaded something to the vs' * frame, but later something tried to get loaded to a frame with * the same name and we got back this frame again, so we are now * overriding the original document with a cuckoo. This assert()ion * should be re-enabled when we start to get this right (which is * very complex, but someone should rewrite the frames support * anyway). --pasky */ assert(!vs->doc_view); #else if (vs->doc_view) { /* It will be still detached, no worries - hopefully it still * resides in ses->scrn_frames. */ 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 *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); }