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cairo: add cursor

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This commit is contained in:
Jari Vetoniemi 2020-02-07 18:15:34 +02:00
parent e7d6562046
commit 42eca37688
1 changed files with 35 additions and 0 deletions
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35
lib/renderers/cairo.h
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@ -24,6 +24,8 @@ struct cairo_paint {
struct cairo_color bg;
const char *font;
int32_t baseline;
uint32_t cursor;
bool draw_cursor;
struct box {
int32_t lx, rx; // left/right offset (pos.x - lx, box.w + rx)
@ -152,6 +154,36 @@ bm_cairo_draw_line(struct cairo *cairo, struct cairo_paint *paint, struct cairo_
cairo_move_to(cairo->cr, paint->box.lx + paint->pos.x, paint->pos.y - base + paint->baseline);
pango_cairo_show_layout(cairo->cr, layout);
if (paint->draw_cursor) {
size_t chr = 0;
for (size_t c = 0; c < paint->cursor; ++chr, c += bm_utf8_rune_next(buffer, c));
PangoRectangle rect;
pango_layout_index_to_pos(layout, chr, &rect);
if (!rect.width) {
struct cairo_result result = {0};
bm_pango_get_text_extents(cairo, paint, &result, "#");
rect.width = result.x_advance * PANGO_SCALE;
}
cairo_set_source_rgba(cairo->cr, paint->fg.r, paint->fg.b, paint->fg.g, paint->fg.a);
cairo_rectangle(cairo->cr,
paint->pos.x + paint->box.lx + rect.x / PANGO_SCALE, paint->pos.y - paint->box.ty,
rect.width / PANGO_SCALE, height + paint->box.by + paint->box.ty);
cairo_fill(cairo->cr);
cairo_rectangle(cairo->cr,
paint->pos.x + paint->box.lx + rect.x / PANGO_SCALE, paint->pos.y - paint->box.ty,
rect.width / PANGO_SCALE, height + paint->box.by + paint->box.ty);
cairo_clip(cairo->cr);
cairo_set_source_rgba(cairo->cr, paint->bg.r, paint->bg.b, paint->bg.g, paint->bg.a);
cairo_move_to(cairo->cr, paint->box.lx + paint->pos.x, paint->pos.y - base + paint->baseline);
pango_cairo_show_layout(cairo->cr, layout);
cairo_reset_clip(cairo->cr);
}
g_object_unref(layout);
result->x_advance = width + paint->box.rx;
@ -210,9 +242,12 @@ bm_cairo_paint(struct cairo *cairo, uint32_t width, uint32_t max_height, const s
bm_cairo_color_from_menu_color(menu, BM_COLOR_FILTER_FG, &paint.fg);
bm_cairo_color_from_menu_color(menu, BM_COLOR_FILTER_BG, &paint.bg);
paint.draw_cursor = true;
paint.cursor = menu->cursor;
paint.pos = (struct pos){ (menu->title ? 2 : 0) + result.x_advance, vpadding };
paint.box = (struct box){ (menu->title ? 2 : 4), 0, vpadding, vpadding, width - paint.pos.x, ascii_height };
bm_cairo_draw_line(cairo, &paint, &result, "%s", (menu->filter ? menu->filter : ""));
paint.draw_cursor = false;
const uint32_t titleh = result.height;
out_result->height = titleh;