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#include <cairo/cairo.h>
#include <pango/pangocairo.h>
#include <pango/pango.h>
#include "../entry.h"
#include "../log.h"
#include "../nelem.h"
#undef MAX
#define MAX(a, b) ((a) > (b) ? (a) : (b))
void entry_backend_pango_init(struct entry *entry, uint32_t *width, uint32_t *height)
{
cairo_t *cr = entry->cairo[0].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->pango.layout = pango_layout_new(context);
log_debug("Setting Pango text.\n");
pango_layout_set_text(entry->pango.layout, entry->prompt_text, -1);
log_debug("First Pango draw.\n");
pango_cairo_update_layout(cr, entry->pango.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->pango.layout);
/* Move and clip so we don't draw over the prompt */
int prompt_width;
pango_layout_get_pixel_size(entry->pango.layout, &prompt_width, NULL);
cairo_translate(cr, prompt_width, 0);
*width -= prompt_width;
cairo_rectangle(cr, 0, 0, *width, *height);
cairo_clip(cr);
entry->pango.context = context;
}
void entry_backend_pango_destroy(struct entry *entry)
{
g_object_unref(entry->pango.layout);
g_object_unref(entry->pango.context);
}
void entry_backend_pango_update(struct entry *entry)
{
cairo_t *cr = entry->cairo[entry->index].cr;
PangoLayout *layout = entry->pango.layout;
cairo_save(cr);
struct color color = entry->foreground_color;
cairo_set_source_rgba(cr, color.r, color.g, color.b, color.a);
pango_layout_set_text(layout, entry->input_mb, -1);
pango_cairo_update_layout(cr, layout);
pango_cairo_show_layout(cr, layout);
int width;
int height;
pango_layout_get_size(layout, &width, &height);
width = MAX(width, (int)entry->input_width * PANGO_SCALE);
cairo_matrix_t mat;
for (size_t i = 0; i < entry->results.count; i++) {
if (entry->horizontal) {
cairo_translate(cr, (int)(width / PANGO_SCALE) + entry->result_spacing, 0);
} else {
cairo_translate(cr, 0, (int)(height / PANGO_SCALE) + entry->result_spacing);
}
if (entry->num_results == 0) {
cairo_get_matrix(cr, &mat);
if (entry->horizontal) {
if (mat.x0 > entry->clip_x + entry->clip_width) {
entry->num_results_drawn = i;
log_debug("Drew %zu results.\n", i);
break;
}
} else {
if (mat.y0 > entry->clip_y + entry->clip_height) {
entry->num_results_drawn = i;
log_debug("Drew %zu results.\n", i);
break;
}
}
} else if (i >= entry->num_results) {
break;
}
const char *str;
if (i < entry->results.count) {
str = entry->results.buf[i].string;
} else {
str = "";
}
pango_layout_set_text(layout, str, -1);
pango_cairo_update_layout(cr, layout);
if (i == entry->selection) {
cairo_push_group(cr);
color = entry->selection_foreground_color;
cairo_set_source_rgba(cr, color.r, color.g, color.b, color.a);
}
pango_cairo_show_layout(cr, layout);
pango_layout_get_size(layout, &width, &height);
if (i == entry->selection) {
cairo_pop_group_to_source(cr);
cairo_save(cr);
color = entry->selection_background_color;
cairo_set_source_rgba(cr, color.r, color.g, color.b, color.a);
cairo_rectangle(cr, 0, 0, (int)(width / PANGO_SCALE), (int)(height / PANGO_SCALE));
cairo_fill(cr);
cairo_restore(cr);
cairo_paint(cr);
color = entry->foreground_color;
cairo_set_source_rgba(cr, color.r, color.g, color.b, color.a);
}
}
cairo_restore(cr);
}
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