status.c

一个很有名的浏览器

		unsigned char tab_info[8];

		tab_info[tab_info_len++] = '[';
		ulongcat(tab_info, &tab_info_len, term->current_tab + 1, 4, 0);
		tab_info[tab_info_len++] = ']';
		tab_info[tab_info_len++] = ' ';
		tab_info[tab_info_len] = '\0';

		text_color = get_bfu_color(term, "status.status-text");
		draw_text(term, 0, term->height - 1, tab_info, tab_info_len,
			0, text_color);
	}

	if (!msg) return;

	if (!text_color)
		text_color = get_bfu_color(term, "status.status-text");

	msglen = strlen(msg);
	draw_text(term, 0 + tab_info_len, term->height - 1,
		  msg, msglen, 0, text_color);
	mem_free(msg);

	if (download_is_progressing(download) && download->progress->size > 0) {
		int xend = term->width - 1;
		int width;

#ifdef CONFIG_LEDS
		if (ses->status.show_leds)
			xend -= term->leds_length;
#endif

		width = int_max(0, xend - msglen - tab_info_len - 1);
		if (width < 6) return;
		int_upper_bound(&width, 20);
		download_progress_bar(term, xend - width, term->height - 1,
				      width, NULL, NULL,
				      download->progress->pos, download->progress->size);
	}
}

static inline void
display_tab_bar(struct session *ses, struct terminal *term, int tabs_count)
{
	struct color_pair *normal_color = get_bfu_color(term, "tabs.normal");
	struct color_pair *selected_color = get_bfu_color(term, "tabs.selected");
	struct color_pair *loading_color = get_bfu_color(term, "tabs.loading");
	struct color_pair *fresh_color = get_bfu_color(term, "tabs.unvisited");
	struct color_pair *tabsep_color = get_bfu_color(term, "tabs.separator");
	struct session_status *status = &ses->status;
	int tab_width = int_max(1, term->width / tabs_count);
	int tab_total_width = tab_width * tabs_count;
	int tab_remain_width = int_max(0, term->width - tab_total_width);
	int tab_add = int_max(1, (tab_remain_width / tabs_count));
	int tab_num;
	struct box box;

	set_box(&box, 0, term->height - (status->show_status_bar ? 2 : 1), 0, 1);

	for (tab_num = 0; tab_num < tabs_count; tab_num++) {
		struct download *download = NULL;
		struct color_pair *color = normal_color;
		struct window *tab = get_tab_by_number(term, tab_num);
		struct document_view *doc_view;
		struct session *tab_ses = tab->data;
		int actual_tab_width = tab_width - 1;
		unsigned char *msg;

		/* Adjust tab size to use full term width. */
		if (tab_remain_width) {
			actual_tab_width += tab_add;
			tab_remain_width -= tab_add;
		}

		doc_view = tab_ses ? current_frame(tab_ses) : NULL;

		if (doc_view) {
			if (doc_view->document->title
			    && *(doc_view->document->title))
				msg = doc_view->document->title;
			else
				msg = _("Untitled", term);
		} else {
			msg = _("No document", term);
		}

		if (tab_num) {
			draw_char(term, box.x, box.y, BORDER_SVLINE,
				  SCREEN_ATTR_FRAME, tabsep_color);
			box.x++;
		}

		if (tab_num == term->current_tab) {
			color = selected_color;

		} else {
			download = get_current_download(tab_ses);

			if (download && download->state != S_OK) {
				color = loading_color;
			} else if (!tab_ses || !tab_ses->status.visited) {
				color = fresh_color;
			}

			if (!download_is_progressing(download)
			    || download->progress->size <= 0)
				download = NULL;
		}

		box.width = actual_tab_width + 1;
		draw_box(term, &box, ' ', 0, color);

		if (download) {
			download_progress_bar(term, box.x, box.y,
					      actual_tab_width, msg, NULL,
					      download->progress->pos, download->progress->size);
		} else {
			int msglen = int_min(strlen(msg), actual_tab_width);

			draw_text(term, box.x, box.y, msg, msglen, 0, color);
		}

		tab->xpos = box.x;
		tab->width = actual_tab_width;
		if (tab_num == tabs_count - 1) {
			/* This is the last tab, and is therefore followed
			 * by a space, not a separator; increment tab->width
			 * to count that space as part of the tab.
			 * -- Miciah */
			tab->width++;
		}

		box.x += actual_tab_width;
	}
}

/* Print page's title and numbering at window top. */
static inline void
display_title_bar(struct session *ses, struct terminal *term)
{
	struct document_view *doc_view;
	struct document *document;
	struct string title;
	unsigned char buf[40];
	int buflen = 0;
	int height;
	struct box box;

	/* Clear the old title */
	set_box(&box, 0, 0, term->width, 1);
	draw_box(term, &box, ' ', 0, get_bfu_color(term, "title.title-bar"));

	doc_view = current_frame(ses);
	if (!doc_view || !doc_view->document) return;

	if (!init_string(&title)) return;

	document = doc_view->document;

	/* Set up the document page info string: '(' %page '/' %pages ')' */
	height = doc_view->box.height;
	if (height < document->height && doc_view->vs) {
		int pos = doc_view->vs->y + height;
		int page = 1;
		int pages = height ? (document->height + height - 1) / height : 1;

		/* Check if at the end else calculate the page. */
		if (pos >= document->height) {
			page = pages;
		} else if (height) {
			page = int_min((pos - height / 2) / height + 1, pages);
		}

		buflen = snprintf(buf, sizeof(buf), " (%d/%d)", page, pages);
		if (buflen < 0) buflen = 0;
	}

	if (document->title) {
		int maxlen = int_max(term->width - 4 - buflen, 0);
		int titlelen = int_min(strlen(document->title), maxlen);

		add_bytes_to_string(&title, document->title, titlelen);

		if (titlelen == maxlen)
			add_bytes_to_string(&title, "...", 3);
	}

	if (buflen > 0)
		add_bytes_to_string(&title, buf, buflen);

	if (title.length) {
		int x = int_max(term->width - 1 - title.length, 0);

		draw_text(term, x, 0, title.source, title.length, 0,
			  get_bfu_color(term, "title.title-text"));
	}

	done_string(&title);
}

static inline void
display_window_title(struct session *ses, struct terminal *term)
{
	static struct session *last_ses;
	struct session_status *status = &ses->status;
	unsigned char *doc_title = NULL;
	unsigned char *title;
	int titlelen;

	if (ses->doc_view
	    && ses->doc_view->document
	    && ses->doc_view->document->title
	    && ses->doc_view->document->title[0])
		doc_title = ses->doc_view->document->title;

	title = straconcat("ELinks",
			   doc_title ? " - " : NULL,
			   doc_title,
			   NULL);
	if (!title) return;

	titlelen = strlen(title);
	if (last_ses != ses
	    || !status->last_title
	    || strlen(status->last_title) != titlelen
	    || memcmp(status->last_title, title, titlelen)) {
		mem_free_set(&status->last_title, title);
		set_terminal_title(term, title);
		last_ses = ses;
	} else {
		mem_free(title);
	}
}

#ifdef CONFIG_LEDS
static inline void
display_leds(struct session *ses, struct session_status *status)
{
	if (ses->doc_view && ses->doc_view->document
	    && ses->doc_view->document->uri) {
		struct cache_entry *cached =
			find_in_cache(ses->doc_view->document->uri);

		if (cached) {
			status->ssl_led->value = (cached->ssl_info)
					    ? 'S' : '-';
		} else {
			/* FIXME: We should do this thing better. */
			status->ssl_led->value = '?';
		}
	}

	if (ses->insert_mode == INSERT_MODE_LESS) {
		status->insert_mode_led->value = 'i';
	} else {
		unsigned char value = ses->insert_mode == INSERT_MODE_ON
				    ? 'I' : '-';
		status->insert_mode_led->value = value;
	}

	draw_leds(ses);
}
#endif /* CONFIG_LEDS */

/* Print statusbar and titlebar, set terminal title. */
void
print_screen_status(struct session *ses)
{
	struct terminal *term = ses->tab->term;
	struct session_status *status = &ses->status;
	int tabs_count = number_of_tabs(term);
	int ses_tab_is_current = (ses->tab == get_current_tab(term));

	if (ses_tab_is_current) {
		if (status->set_window_title)
			display_window_title(ses, term);

		if (status->show_title_bar)
			display_title_bar(ses, term);

		if (status->show_status_bar)
			display_status_bar(ses, term, tabs_count);
#ifdef CONFIG_LEDS
		if (status->show_leds)
			display_leds(ses, status);
#endif

		if (!ses->status.visited)
			ses->status.visited = 1;
	}

	if (status->show_tabs_bar) {
		display_tab_bar(ses, term, tabs_count);
	}

	redraw_from_window(ses->tab);
}