link.c

一个很有名的浏览器

		uri = get_link_uri(ses, doc_view, link);

	if (!uri) return NULL;

	if (link->type == LINK_MAP) {
		/* TODO: Test reload? */
		goto_imgmap(ses, uri, null_or_stracpy(link->target));

	} else {
		enum cache_mode mode = do_reload ? CACHE_MODE_FORCE_RELOAD
						 : CACHE_MODE_NORMAL;

		goto_uri_frame(ses, uri, link->target, mode);
	}

	done_uri(uri);
	return link;
}

enum frame_event_status
enter(struct session *ses, struct document_view *doc_view, int do_reload)
{
	struct form_control *link_fc;
	struct link *link;

	assert(ses && doc_view && doc_view->vs && doc_view->document);
	if_assert_failed return FRAME_EVENT_REFRESH;

	link = get_current_link(doc_view);
	if (!link) return FRAME_EVENT_REFRESH;

	if (!current_link_evhook(doc_view, SEVHOOK_ONCLICK))
		return FRAME_EVENT_REFRESH;

	if (!link_is_form(link)
	    || link_is_textinput(link)
	    || link->type == LINK_BUTTON) {
		if (goto_current_link(ses, doc_view, do_reload))
			return FRAME_EVENT_OK;

		return FRAME_EVENT_REFRESH;
	}

	link_fc = get_link_form_control(link);

	if (form_field_is_readonly(link_fc))
		return FRAME_EVENT_OK;

	if (link->type == LINK_CHECKBOX) {
		struct form_state *fs;

		fs = find_form_state(doc_view, link_fc);
		if (!fs) return FRAME_EVENT_OK;

		if (link_fc->type == FC_CHECKBOX) {
			fs->state = !fs->state;

		} else {
			struct form *form;

			foreach (form, doc_view->document->forms) {
				struct form_control *fc;

				if (form != link_fc->form)
					continue;

				foreach (fc, form->items) {
					if (fc->type == FC_RADIO
				            && !xstrcmp(fc->name, link_fc->name)) {
						struct form_state *frm_st;

						frm_st = find_form_state(doc_view, fc);
						if (frm_st) frm_st->state = 0;
					}
				}
			}
			fs->state = 1;
		}

	} else if (link->type == LINK_SELECT) {
		object_lock(doc_view->document);
		add_empty_window(ses->tab->term,
				 (void (*)(void *)) release_document,
				 doc_view->document);
		do_select_submenu(ses->tab->term, link_fc->menu, ses);

	} else {
		INTERNAL("bad link type %d", link->type);
	}

	return FRAME_EVENT_REFRESH;
}

struct link *
get_link_at_coordinates(struct document_view *doc_view, int x, int y)
{
	struct link *l1, *l2, *link;
	int i, height;

	assert(doc_view && doc_view->vs && doc_view->document);
	if_assert_failed return NULL;

	/* If there are no links in in document, there is nothing to do. */
	if (!doc_view->document->nlinks) return NULL;

	/* If the coordinates are outside document view, no need to go further. */
	if (x < 0 || x >= doc_view->box.width) return NULL;
	if (y < 0 || y >= doc_view->box.height) return NULL;

	/* FIXME: This doesn't work. --Zas
	if (!check_mouse_position(ev, &doc_view->box))
		return NULL;
	*/

	/* Find link candidates. */
	l1 = doc_view->document->links + doc_view->document->nlinks;
	l2 = doc_view->document->links;
	height = int_min(doc_view->document->height,
			 doc_view->vs->y + doc_view->box.height);

	for (i = doc_view->vs->y; i < height; i++) {
		if (doc_view->document->lines1[i]
		    && doc_view->document->lines1[i] < l1)
			l1 = doc_view->document->lines1[i];

		if (doc_view->document->lines2[i]
		    && doc_view->document->lines2[i] > l2)
			l2 = doc_view->document->lines2[i];
	}

	/* Is there a link at the given coordinates? */
	x += doc_view->vs->x;
	y += doc_view->vs->y;

	for (link = l1; link <= l2; link++) {
		for (i = 0; i < link->npoints; i++)
			if (link->points[i].x == x
			    && link->points[i].y == y)
				return link;
	}

	return NULL;
}

/* This is backend of the backend goto_link_number_do() below ;)). */
void
jump_to_link_number(struct session *ses, struct document_view *doc_view, int n)
{
	assert(ses && doc_view && doc_view->vs && doc_view->document);
	if_assert_failed return;

	if (n < 0 || n >= doc_view->document->nlinks) return;
	current_link_blur(doc_view);
	doc_view->vs->current_link = n;
	if (ses->navigate_mode == NAVIGATE_CURSOR_ROUTING) {
		struct link *link = get_current_link(doc_view);
		int offset = get_link_cursor_offset(doc_view, link);

		if (link->npoints > offset) {
			int x = link->points[offset].x
				+ doc_view->box.x - doc_view->vs->x;
			int y = link->points[offset].y
				+ doc_view->box.y - doc_view->vs->y;

			move_cursor(ses, doc_view, x, y);
		}
	}
	check_vs(doc_view);
	current_link_hover(doc_view);
}

/* This is common backend for goto_link_number() and try_document_key(). */
static void
goto_link_number_do(struct session *ses, struct document_view *doc_view, int n)
{
	struct link *link;

	assert(ses && doc_view && doc_view->document);
	if_assert_failed return;
	if (n < 0 || n >= doc_view->document->nlinks) return;
	jump_to_link_number(ses, doc_view, n);

	link = &doc_view->document->links[n];
	if (!link_is_textinput(link)
	    && get_opt_bool("document.browse.accesskey.auto_follow"))
		enter(ses, doc_view, 0);
}

void
goto_link_number(struct session *ses, unsigned char *num)
{
	struct document_view *doc_view;

	assert(ses && num);
	if_assert_failed return;
	doc_view = current_frame(ses);
	assert(doc_view);
	if_assert_failed return;
	goto_link_number_do(ses, doc_view, atoi(num) - 1);
}

/* See if this document is interested in the key user pressed. */
enum frame_event_status
try_document_key(struct session *ses, struct document_view *doc_view,
		 struct term_event *ev)
{
	long key;
	int passed = -1;
	int i; /* GOD I HATE C! --FF */ /* YEAH, BRAINFUCK RULEZ! --pasky */

	assert(ses && doc_view && doc_view->document && doc_view->vs && ev);
	if_assert_failed return FRAME_EVENT_IGNORED;

	if (isasciialpha(get_kbd_key(ev)) && !check_kbd_modifier(ev, KBD_ALT)) {
		/* We accept those only in alt-combo. */
		return FRAME_EVENT_IGNORED;
	}

	/* Run through all the links and see if one of them is bound to the
	 * key we test.. */
	key = toupper(get_kbd_key(ev));

	for (i = 0; i < doc_view->document->nlinks; i++) {
		struct link *link = &doc_view->document->links[i];

		if (key == link->accesskey) {
			if (passed != i && i <= doc_view->vs->current_link) {
				/* This is here in order to rotate between
				 * links with same accesskey. */
				if (passed < 0)	passed = i;
				continue;
			}
			ses->kbdprefix.repeat_count = 0;
			goto_link_number_do(ses, doc_view, i);
			return FRAME_EVENT_REFRESH;
		}

		if (i == doc_view->document->nlinks - 1 && passed >= 0) {
			/* Return to the start. */
			i = passed - 1;
		}
	}

	return FRAME_EVENT_IGNORED;
}

/* Open a contextual menu on a link, form or image element. */
/* TODO: This should be completely configurable. */
void
link_menu(struct terminal *term, void *xxx, void *ses_)
{
	struct session *ses = ses_;
	struct document_view *doc_view;
	struct link *link;
	struct menu_item *mi;
	struct form_control *fc;

	assert(term && ses);
	if_assert_failed return;

	doc_view = current_frame(ses);
	mi = new_menu(FREE_LIST);
	if (!mi) return;
	if (!doc_view) goto end;

	assert(doc_view->vs && doc_view->document);
	if_assert_failed return;

	link = get_current_link(doc_view);
	if (!link) goto end;

	if (link->where && !link_is_form(link)) {
		if (link->type == LINK_MAP) {
			add_to_menu(&mi, N_("Display ~usemap"), NULL, ACT_MAIN_LINK_FOLLOW,
				    NULL, NULL, SUBMENU);
		} else {
			add_menu_action(&mi, N_("~Follow link"), ACT_MAIN_LINK_FOLLOW);

			add_menu_action(&mi, N_("Follow link and r~eload"), ACT_MAIN_LINK_FOLLOW_RELOAD);

			add_menu_separator(&mi);

			add_new_win_to_menu(&mi, N_("Open in new ~window"), term);

			add_menu_action(&mi, N_("Open in new ~tab"), ACT_MAIN_OPEN_LINK_IN_NEW_TAB);

			add_menu_action(&mi, N_("Open in new tab in ~background"),
					ACT_MAIN_OPEN_LINK_IN_NEW_TAB_IN_BACKGROUND);

			if (!get_cmd_opt_bool("anonymous")) {
				add_menu_separator(&mi);
				add_menu_action(&mi, N_("~Download link"), ACT_MAIN_LINK_DOWNLOAD);

#ifdef CONFIG_BOOKMARKS
				add_menu_action(&mi, N_("~Add link to bookmarks"),
						ACT_MAIN_ADD_BOOKMARK_LINK);
#endif
				add_uri_command_to_menu(&mi, PASS_URI_LINK);
			}
		}
	}

	fc = get_link_form_control(link);
	if (fc) {
		switch (fc->type) {
		case FC_RESET:
			add_menu_action(&mi, N_("~Reset form"), ACT_MAIN_RESET_FORM);
			break;

		case FC_TEXTAREA:
			if (!form_field_is_readonly(fc)) {
				struct string keystroke;

				if (init_string(&keystroke))
					add_keystroke_to_string(&keystroke,
								ACT_EDIT_OPEN_EXTERNAL,
								KEYMAP_EDIT);

				add_to_menu(&mi, N_("Open in ~external editor"),
					    keystroke.source, ACT_MAIN_NONE,
					    menu_textarea_edit, NULL, FREE_RTEXT);
			}
			/* Fall through */
		default:
			add_menu_action(&mi, N_("~Submit form"), ACT_MAIN_SUBMIT_FORM);
			add_menu_action(&mi, N_("Submit form and rel~oad"), ACT_MAIN_SUBMIT_FORM_RELOAD);

			assert(fc->form);
			if (fc->form->method == FORM_METHOD_GET) {
				add_new_win_to_menu(&mi, N_("Submit form and open in new ~window"), term);

				add_menu_action(&mi, N_("Submit form and open in new ~tab"),
						ACT_MAIN_OPEN_LINK_IN_NEW_TAB);

				add_menu_action(&mi, N_("Submit form and open in new tab in ~background"),
						ACT_MAIN_OPEN_LINK_IN_NEW_TAB_IN_BACKGROUND);
			}

			if (!get_cmd_opt_bool("anonymous"))
				add_menu_action(&mi, N_("Submit form and ~download"), ACT_MAIN_LINK_DOWNLOAD);

			add_menu_action(&mi, N_("~Reset form"), ACT_MAIN_RESET_FORM);
		}
	}

	if (link->where_img) {
		add_menu_action(&mi, N_("V~iew image"), ACT_MAIN_VIEW_IMAGE);
		if (!get_cmd_opt_bool("anonymous"))
			add_menu_action(&mi, N_("Download ima~ge"), ACT_MAIN_LINK_DOWNLOAD_IMAGE);
	}

	/* TODO: Make it possible to trigger any script event hooks associated
	 * to the link. --pasky */

end:
	if (!mi->text) {
		add_to_menu(&mi, N_("No link selected"), NULL, ACT_MAIN_NONE,
			    NULL, NULL, NO_SELECT);
	}

	do_menu(term, mi, ses, 1);
}

/* Return current link's title. Pretty trivial. */
unsigned char *
get_current_link_title(struct document_view *doc_view)
{
	struct link *link;

	assert(doc_view && doc_view->document && doc_view->vs);
	if_assert_failed return NULL;

	if (doc_view->document->frame_desc)
		return NULL;

	link = get_current_link(doc_view);

	return (link && link->title && *link->title) ? stracpy(link->title) : NULL;
}

unsigned char *
get_current_link_info(struct session *ses, struct document_view *doc_view)
{
	struct link *link;

	assert(ses && doc_view && doc_view->document && doc_view->vs);
	if_assert_failed return NULL;

	if (doc_view->document->frame_desc)
		return NULL;

	link = get_current_link(doc_view);
	if (!link) return NULL;

	/* TODO: Provide info about script event hooks too. --pasky */

	if (link_is_form(link)) {
		if (!get_link_form_control(link)) return NULL;

		return get_form_info(ses, doc_view);
	} else {
		struct terminal *term = ses->tab->term;
		struct string str;
		unsigned char *uristring = link->where;

		if (!init_string(&str)) return NULL;

		if (!link->where && link->where_img) {
			add_to_string(&str, _("Image", term));
			add_char_to_string(&str, ' ');
			uristring = link->where_img;

		} else if (link->type == LINK_MAP) {
			add_to_string(&str, _("Usemap", term));
			add_char_to_string(&str, ' ');
		}

		/* Add the uri with password and post info stripped */
		add_string_uri_to_string(&str, uristring, URI_PUBLIC);
		if (link->accesskey > 0
		    && get_opt_bool("document.browse.accesskey.display")) {
			add_to_string(&str, " (");
			make_keystroke(&str, link->accesskey, 0, 0);
			add_char_to_string(&str, ')');
		}

		decode_uri_string_for_display(&str);
		return str.source;
	}
}