perf gtk/annotate: Show source lines with gray color

In order to differentiate source lines from asm line, print them with
gray color.  To do this, it needs to be escaped since sometimes it
contains "<" and/or ">" characters so that it should not be considered
as a markup tags.  Use glib's g_markup_escape_text() for this.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1360227734-375-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/ui/gtk/annotate.c

@@ -60,6 +60,30 @@ static int perf_gtk__get_offset(char *buf, size_t size, struct symbol *sym,
 	return scnprintf(buf, size, "%"PRIx64, start + dl->offset);
 }
 
+static int perf_gtk__get_line(char *buf, size_t size, struct disasm_line *dl)
+{
+	int ret = 0;
+	char *line = g_markup_escape_text(dl->line, -1);
+	const char *markup = "<span fgcolor='gray'>";
+
+	strcpy(buf, "");
+
+	if (!line)
+		return 0;
+
+	if (dl->offset != (s64) -1)
+		markup = NULL;
+
+	if (markup)
+		ret += scnprintf(buf, size, "%s", markup);
+	ret += scnprintf(buf + ret, size - ret, "%s", line);
+	if (markup)
+		ret += scnprintf(buf + ret, size - ret, "</span>");
+
+	g_free(line);
+	return ret;
+}
+
 static int perf_gtk__annotate_symbol(GtkWidget *window, struct symbol *sym,
 				struct map *map, int evidx,
 				struct hist_browser_timer *hbt __maybe_unused)
@@ -93,8 +117,7 @@ static int perf_gtk__annotate_symbol(GtkWidget *window, struct symbol *sym,
 
 	for (i = 0; i < MAX_ANN_COLS; i++) {
 		gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(view),
-					-1, col_names[i], renderer,
-					i == ANN_COL__PERCENT ? "markup" : "text",
+					-1, col_names[i], renderer, "markup",
 					i, NULL);
 	}
 
@@ -110,7 +133,8 @@ static int perf_gtk__annotate_symbol(GtkWidget *window, struct symbol *sym,
 			gtk_list_store_set(store, &iter, ANN_COL__PERCENT, s, -1);
 		if (perf_gtk__get_offset(s, sizeof(s), sym, map, pos))
 			gtk_list_store_set(store, &iter, ANN_COL__OFFSET, s, -1);
-		gtk_list_store_set(store, &iter, ANN_COL__LINE, pos->line, -1);
+		if (perf_gtk__get_line(s, sizeof(s), pos))
+			gtk_list_store_set(store, &iter, ANN_COL__LINE, s, -1);
 	}
 
 	gtk_container_add(GTK_CONTAINER(window), view);