1 files changed, 92 insertions, 0 deletions
diff --git a/src/entry_backend/pango.c b/src/entry_backend/pango.c
new file mode 100644
index 0000000..569a706
--- /dev/null
+++ b/src/entry_backend/pango.c
@@ -0,0 +1,92 @@
+#include <cairo/cairo.h>
+#include <glib.h>
+#include <pango/pangocairo.h>
+#include <pango/pango.h>
+#include <wchar.h>
+#include "../entry.h"
+#include "../log.h"
+#include "../nelem.h"
+
+void entry_backend_init(struct entry *entry, uint32_t width, uint32_t height, uint32_t scale)
+{
+	cairo_t *cr = entry->cairo.cr;
+
+	/* Setup Pango. */
+	log_debug("Creating Pango context.\n");
+	PangoContext *context = pango_cairo_create_context(cr);
+
+	log_debug("Creating Pango font description.\n");
+	PangoFontDescription *font_description =
+		pango_font_description_from_string(entry->font_name);
+	pango_font_description_set_size(
+			font_description,
+			entry->font_size * PANGO_SCALE);
+	pango_context_set_font_description(context, font_description);
+	pango_font_description_free(font_description);
+
+	entry->backend.prompt_layout = pango_layout_new(context);
+	log_debug("Setting Pango text.\n");
+	pango_layout_set_text(entry->backend.prompt_layout, "run: ", -1);
+	int prompt_width;
+	int prompt_height;
+	log_debug("Get Pango pixel size.\n");
+	pango_layout_get_pixel_size(entry->backend.prompt_layout, &prompt_width, &prompt_height);
+	log_debug("First Pango draw.\n");
+	pango_cairo_update_layout(cr, entry->backend.prompt_layout);
+
+	/* Draw the prompt now, as this only needs to be done once */
+	struct color color = entry->foreground_color;
+	cairo_set_source_rgba(cr, color.r, color.g, color.b, color.a);
+	pango_cairo_show_layout(cr, entry->backend.prompt_layout);
+
+	/* Move and clip so we don't draw over the prompt */
+	cairo_translate(cr, prompt_width, 0);
+	width -= prompt_width;
+	cairo_rectangle(cr, 0, 0, width, height);
+	cairo_clip(cr);
+
+	log_debug("Creating Pango layout.\n");
+	entry->backend.entry_layout = pango_layout_new(context);
+	pango_layout_set_text(entry->backend.entry_layout, "", -1);
+
+	for (size_t i = 0; i < 5; i++) {
+		PangoLayout *layout = pango_layout_new(context);
+		pango_layout_set_text(layout, "", -1);
+		entry->backend.result_layouts[i] = layout;
+	}
+
+	entry->backend.context = context;
+}
+
+void entry_backend_destroy(struct entry *entry)
+{
+	for (size_t i = 0; i < 5; i++) {
+		g_object_unref(entry->backend.result_layouts[i]);
+	}
+	g_object_unref(entry->backend.entry_layout);
+	g_object_unref(entry->backend.prompt_layout);
+	g_object_unref(entry->backend.context);
+}
+
+void entry_backend_update(struct entry *entry)
+{
+	cairo_t *cr = entry->cairo.cr;
+
+	pango_layout_set_text(entry->backend.entry_layout, entry->input_mb, -1);
+	pango_cairo_update_layout(cr, entry->backend.entry_layout);
+	pango_cairo_show_layout(cr, entry->backend.entry_layout);
+
+	for (size_t i = 0; i < 5; i++) {
+		cairo_translate(cr, 0, 50);
+		PangoLayout *layout = entry->backend.result_layouts[i];
+		const char *str;
+		if (i < entry->results.count) {
+			str = entry->results.buf[i];
+		} else {
+			str = "";
+		}
+		pango_layout_set_text(layout, str, -1);
+		pango_cairo_update_layout(cr, layout);
+		pango_cairo_show_layout(cr, layout);
+	}
+}