From 2c7351be951c35c64af43b27fba6277b69c5c701 Mon Sep 17 00:00:00 2001
From: Furkan Sahin <furkan-dev@proton.me>
Date: Wed, 28 Mar 2018 23:04:20 -0400
Subject: Start port of swaybar to layer shell

This starts up the event loop and wayland display and shims out the
basic top level rendering concepts. Also includes some changes to
incorporate pango into the 1.x codebase properly.
---
 common/pango.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 common/pango.c

(limited to 'common/pango.c')

diff --git a/common/pango.c b/common/pango.c
new file mode 100644
index 00000000..212d96cf
--- /dev/null
+++ b/common/pango.c
@@ -0,0 +1,67 @@
+#include <cairo/cairo.h>
+#include <pango/pangocairo.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+PangoLayout *get_pango_layout(cairo_t *cairo, const char *font,
+		const char *text, int32_t scale, bool markup) {
+	PangoLayout *layout = pango_cairo_create_layout(cairo);
+	PangoAttrList *attrs;
+	if (markup) {
+		char *buf;
+		pango_parse_markup(text, -1, 0, &attrs, &buf, NULL, NULL);
+		pango_layout_set_markup(layout, buf, -1);
+		free(buf);
+	} else {
+		attrs = pango_attr_list_new();
+		pango_layout_set_text(layout, text, -1);
+	}
+	pango_attr_list_insert(attrs, pango_attr_scale_new(scale));
+	PangoFontDescription *desc = pango_font_description_from_string(font);
+	pango_layout_set_font_description(layout, desc);
+	pango_layout_set_single_paragraph_mode(layout, 1);
+	pango_layout_set_attributes(layout, attrs);
+	pango_attr_list_unref(attrs);
+	pango_font_description_free(desc);
+	return layout;
+}
+
+void get_text_size(cairo_t *cairo, const char *font, int *width, int *height,
+		int32_t scale, bool markup, const char *fmt, ...) {
+	char *buf = malloc(2048);
+
+	va_list args;
+	va_start(args, fmt);
+	if (vsnprintf(buf, 2048, fmt, args) >= 2048) {
+		strcpy(buf, "[buffer overflow]");
+	}
+	va_end(args);
+
+	PangoLayout *layout = get_pango_layout(cairo, font, buf, scale, markup);
+	pango_cairo_update_layout(cairo, layout);
+	pango_layout_get_pixel_size(layout, width, height);
+	g_object_unref(layout);
+	free(buf);
+}
+
+void pango_printf(cairo_t *cairo, const char *font,
+		int32_t scale, bool markup, const char *fmt, ...) {
+	char *buf = malloc(2048);
+
+	va_list args;
+	va_start(args, fmt);
+	if (vsnprintf(buf, 2048, fmt, args) >= 2048) {
+		strcpy(buf, "[buffer overflow]");
+	}
+	va_end(args);
+
+	PangoLayout *layout = get_pango_layout(cairo, font, buf, scale, markup);
+	pango_cairo_update_layout(cairo, layout);
+	pango_cairo_show_layout(cairo, layout);
+	g_object_unref(layout);
+	free(buf);
+}
-- 
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