diff options
Diffstat (limited to 'src/entry_backend/pango.c')
| -rw-r--r-- | src/entry_backend/pango.c | 185 |
1 files changed, 179 insertions, 6 deletions
diff --git a/src/entry_backend/pango.c b/src/entry_backend/pango.c index 82c93ee..d274950 100644 --- a/src/entry_backend/pango.c +++ b/src/entry_backend/pango.c @@ -77,6 +77,127 @@ static void render_text_themed( pango_cairo_show_layout(cr, layout); } +static void render_input( + cairo_t *cr, + PangoLayout *layout, + const char *text, + uint32_t text_length, + const struct text_theme *theme, + uint32_t cursor_position, + const struct cursor_theme *cursor_theme, + PangoRectangle *ink_rect, + PangoRectangle *logical_rect) +{ + struct directional padding = theme->padding; + struct color color = theme->foreground_color; + cairo_set_source_rgba(cr, color.r, color.g, color.b, color.a); + + pango_layout_set_text(layout, text, -1); + pango_cairo_update_layout(cr, layout); + pango_cairo_show_layout(cr, layout); + + pango_layout_get_pixel_extents(layout, ink_rect, logical_rect); + + double extra_cursor_advance = 0; + if (cursor_position == text_length && cursor_theme->show) { + switch (cursor_theme->style) { + case CURSOR_STYLE_BAR: + extra_cursor_advance = cursor_theme->thickness; + break; + case CURSOR_STYLE_BLOCK: + extra_cursor_advance = cursor_theme->em_width; + break; + case CURSOR_STYLE_UNDERSCORE: + extra_cursor_advance = cursor_theme->em_width; + break; + } + extra_cursor_advance += logical_rect->width + - logical_rect->x + - ink_rect->width; + } + + if (theme->background_color.a != 0) { + cairo_save(cr); + color = theme->background_color; + cairo_set_source_rgba(cr, color.r, color.g, color.b, color.a); + cairo_translate( + cr, + floor(-padding.left + ink_rect->x), + -padding.top); + rounded_rectangle( + cr, + ceil(ink_rect->width + extra_cursor_advance + padding.left + padding.right), + ceil(logical_rect->height + padding.top + padding.bottom), + theme->background_corner_radius + ); + cairo_fill(cr); + cairo_restore(cr); + + color = theme->foreground_color; + cairo_set_source_rgba(cr, color.r, color.g, color.b, color.a); + + pango_cairo_show_layout(cr, layout); + } + + if (!cursor_theme->show) { + /* No cursor to draw, we're done. */ + return; + } + + double cursor_x; + double cursor_width; + + if (cursor_position == text_length) { + cursor_x = logical_rect->width + logical_rect->x; + cursor_width = cursor_theme->em_width; + } else { + /* + * Pango wants a byte index rather than a character index for + * the cursor position, so we have to calculate that here. + */ + const char *tmp = text; + for (size_t i = 0; i < cursor_position; i++) { + tmp = utf8_next_char(tmp); + } + uint32_t start_byte_index = tmp - text; + uint32_t end_byte_index = utf8_next_char(tmp) - text; + PangoRectangle start_pos; + PangoRectangle end_pos; + pango_layout_get_cursor_pos(layout, start_byte_index, &start_pos, NULL); + pango_layout_get_cursor_pos(layout, end_byte_index, &end_pos, NULL); + cursor_x = (double)start_pos.x / PANGO_SCALE; + cursor_width = (double)(end_pos.x - start_pos.x) / PANGO_SCALE;; + } + + cairo_save(cr); + color = cursor_theme->color; + cairo_set_source_rgba(cr, color.r, color.g, color.b, color.a); + cairo_translate(cr, cursor_x, 0); + switch (cursor_theme->style) { + case CURSOR_STYLE_BAR: + rounded_rectangle(cr, cursor_theme->thickness, logical_rect->height, cursor_theme->corner_radius); + cairo_fill(cr); + break; + case CURSOR_STYLE_BLOCK: + rounded_rectangle(cr, cursor_width, logical_rect->height, cursor_theme->corner_radius); + cairo_fill_preserve(cr); + cairo_clip(cr); + cairo_translate(cr, -cursor_x, 0); + color = cursor_theme->text_color; + cairo_set_source_rgba(cr, color.r, color.g, color.b, color.a); + pango_cairo_show_layout(cr, layout); + break; + case CURSOR_STYLE_UNDERSCORE: + cairo_translate(cr, 0, cursor_theme->underline_depth); + rounded_rectangle(cr, cursor_width, cursor_theme->thickness, cursor_theme->corner_radius); + cairo_fill(cr); + break; + } + + logical_rect->width += extra_cursor_advance; + cairo_restore(cr); +} + void entry_backend_pango_init(struct entry *entry, uint32_t *width, uint32_t *height) { cairo_t *cr = entry->cairo[0].cr; @@ -97,7 +218,6 @@ void entry_backend_pango_init(struct entry *entry, uint32_t *width, uint32_t *he entry->font_variations); } pango_context_set_font_description(context, font_description); - pango_font_description_free(font_description); entry->pango.layout = pango_layout_new(context); @@ -109,6 +229,33 @@ void entry_backend_pango_init(struct entry *entry, uint32_t *width, uint32_t *he pango_layout_set_attributes(entry->pango.layout, attr_list); } + log_debug("Loading Pango font.\n"); + PangoFontMap *map = pango_cairo_font_map_get_default(); + PangoFont *font = pango_font_map_load_font(map, context, font_description); + PangoFontMetrics *metrics = pango_font_get_metrics(font, NULL); + hb_font_t *hb_font = pango_font_get_hb_font(font); + + uint32_t m_codepoint; + if (hb_font_get_glyph_from_name(hb_font, "m", -1, &m_codepoint)) { + entry->cursor_theme.em_width = (double)hb_font_get_glyph_h_advance(hb_font, m_codepoint) / PANGO_SCALE; + } else { + entry->cursor_theme.em_width = (double)pango_font_metrics_get_approximate_char_width(metrics) / PANGO_SCALE; + } + + entry->cursor_theme.underline_depth = (double) + ( + pango_font_metrics_get_ascent(metrics) + - pango_font_metrics_get_underline_position(metrics) + ) / PANGO_SCALE; + if (entry->cursor_theme.style == CURSOR_STYLE_UNDERSCORE && !entry->cursor_theme.thickness_specified) { + entry->cursor_theme.thickness = pango_font_metrics_get_underline_thickness(metrics) / PANGO_SCALE; + } + + pango_font_metrics_unref(metrics); + g_object_unref(font); + log_debug("Loaded.\n"); + + pango_font_description_free(font_description); entry->pango.context = context; } @@ -148,7 +295,6 @@ void entry_backend_pango_update(struct entry *entry) PangoLayout *layout = entry->pango.layout; cairo_save(cr); - struct color color = entry->foreground_color; /* Render the prompt */ PangoRectangle ink_rect; @@ -160,7 +306,16 @@ void entry_backend_pango_update(struct entry *entry) /* Render the entry text */ if (entry->input_utf8_length == 0) { - render_text_themed(cr, layout, entry->placeholder_text, &entry->placeholder_theme, &ink_rect, &logical_rect); + render_input( + cr, + layout, + entry->placeholder_text, + utf8_strlen(entry->placeholder_text), + &entry->placeholder_theme, + 0, + &entry->cursor_theme, + &ink_rect, + &logical_rect); } else if (entry->hide_input) { size_t nchars = entry->input_utf32_length; size_t char_size = entry->hidden_character_utf8_length; @@ -172,14 +327,32 @@ void entry_backend_pango_update(struct entry *entry) } buf[char_size * nchars] = '\0'; - render_text_themed(cr, layout, buf, &entry->placeholder_theme, &ink_rect, &logical_rect); + render_input( + cr, + layout, + buf, + entry->input_utf32_length, + &entry->input_theme, + entry->cursor_position, + &entry->cursor_theme, + &ink_rect, + &logical_rect); free(buf); } else { - render_text_themed(cr, layout, entry->input_utf8, &entry->input_theme, &ink_rect, &logical_rect); + render_input( + cr, + layout, + entry->input_utf8, + entry->input_utf32_length, + &entry->input_theme, + entry->cursor_position, + &entry->cursor_theme, + &ink_rect, + &logical_rect); } logical_rect.width = MAX(logical_rect.width, (int)entry->input_width); - color = entry->foreground_color; + struct color color = entry->foreground_color; cairo_set_source_rgba(cr, color.r, color.g, color.b, color.a); uint32_t num_results; |