diff options
Diffstat (limited to 'modules/text_server_fb/text_server_fb.cpp')
| -rw-r--r-- | modules/text_server_fb/text_server_fb.cpp | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/modules/text_server_fb/text_server_fb.cpp b/modules/text_server_fb/text_server_fb.cpp index a22559efdd..576d130cc0 100644 --- a/modules/text_server_fb/text_server_fb.cpp +++ b/modules/text_server_fb/text_server_fb.cpp @@ -1141,6 +1141,161 @@ bool TextServerFallback::shaped_text_update_justification_ops(RID p_shaped) { return true; } +void TextServerFallback::shaped_text_overrun_trim_to_width(RID p_shaped_line, float p_width, uint8_t p_clip_flags) { + _THREAD_SAFE_METHOD_ + ShapedTextData *sd = shaped_owner.getornull(p_shaped_line); + ERR_FAIL_COND_MSG(!sd, "ShapedTextDataAdvanced invalid."); + if (!sd->valid) { + shaped_text_shape(p_shaped_line); + } + + bool add_ellipsis = (p_clip_flags & OVERRUN_ADD_ELLIPSIS) == OVERRUN_ADD_ELLIPSIS; + bool cut_per_word = (p_clip_flags & OVERRUN_TRIM_WORD_ONLY) == OVERRUN_TRIM_WORD_ONLY; + bool enforce_ellipsis = (p_clip_flags & OVERRUN_ENFORCE_ELLIPSIS) == OVERRUN_ENFORCE_ELLIPSIS; + + Glyph *sd_glyphs = sd->glyphs.ptrw(); + + if ((p_clip_flags & OVERRUN_TRIM) == OVERRUN_NO_TRIMMING || sd_glyphs == nullptr || p_width <= 0 || !(sd->width > p_width || enforce_ellipsis)) { + return; + } + + int sd_size = sd->glyphs.size(); + RID last_gl_font_rid = sd_glyphs[sd_size - 1].font_rid; + int last_gl_font_size = sd_glyphs[sd_size - 1].font_size; + uint32_t dot_gl_idx = font_get_glyph_index(last_gl_font_rid, '.'); + Vector2 dot_adv = font_get_glyph_advance(last_gl_font_rid, dot_gl_idx, last_gl_font_size); + uint32_t whitespace_gl_idx = font_get_glyph_index(last_gl_font_rid, ' '); + Vector2 whitespace_adv = font_get_glyph_advance(last_gl_font_rid, whitespace_gl_idx, last_gl_font_size); + + int ellipsis_advance = 0; + if (add_ellipsis) { + ellipsis_advance = 3 * dot_adv.x + font_get_spacing_glyph(last_gl_font_rid) + (cut_per_word ? whitespace_adv.x : 0); + } + + int ell_min_characters = 6; + float width = sd->width; + + bool is_rtl = sd->direction == DIRECTION_RTL || (sd->direction == DIRECTION_AUTO && sd->para_direction == DIRECTION_RTL); + + int trim_pos = (is_rtl) ? sd_size : 0; + int ellipsis_pos = (enforce_ellipsis) ? 0 : -1; + + int last_valid_cut = 0; + bool found = false; + + int glyphs_from = (is_rtl) ? 0 : sd_size - 1; + int glyphs_to = (is_rtl) ? sd_size - 1 : -1; + int glyphs_delta = (is_rtl) ? +1 : -1; + + for (int i = glyphs_from; i != glyphs_to; i += glyphs_delta) { + if (!is_rtl) { + width -= sd_glyphs[i].advance; + } + if (sd_glyphs[i].count > 0) { + bool above_min_char_treshold = ((is_rtl) ? sd_size - 1 - i : i) >= ell_min_characters; + + if (width + (((above_min_char_treshold && add_ellipsis) || enforce_ellipsis) ? ellipsis_advance : 0) <= p_width) { + if (cut_per_word && above_min_char_treshold) { + if ((sd_glyphs[i].flags & GRAPHEME_IS_BREAK_SOFT) == GRAPHEME_IS_BREAK_SOFT) { + last_valid_cut = i; + found = true; + } + } else { + last_valid_cut = i; + found = true; + } + if (found) { + trim_pos = last_valid_cut; + + if (above_min_char_treshold && width - ellipsis_advance <= p_width) { + ellipsis_pos = trim_pos; + } + break; + } + } + } + if (is_rtl) { + width -= sd_glyphs[i].advance; + } + } + + if ((trim_pos >= 0 && sd->width > p_width) || enforce_ellipsis) { + int added_glyphs = 0; + if (add_ellipsis && (ellipsis_pos > 0 || enforce_ellipsis)) { + // Insert an additional space when cutting word bound for aesthetics. + if (cut_per_word && (ellipsis_pos > 0)) { + TextServer::Glyph gl; + gl.start = sd_glyphs[ellipsis_pos].start; + gl.end = sd_glyphs[ellipsis_pos].end; + gl.count = 1; + gl.advance = whitespace_adv.x; + gl.index = whitespace_gl_idx; + gl.font_rid = last_gl_font_rid; + gl.font_size = last_gl_font_size; + gl.flags = GRAPHEME_IS_SPACE | GRAPHEME_IS_BREAK_SOFT | GRAPHEME_IS_VIRTUAL | (is_rtl ? GRAPHEME_IS_RTL : 0); + + // Optimized glyph insertion by replacing a glyph whenever possible. + int glyph_idx = trim_pos + ((is_rtl) ? -added_glyphs : added_glyphs); + if (is_rtl) { + if (glyph_idx < 0) { + sd->glyphs.insert(0, gl); + } else { + sd->glyphs.set(glyph_idx, gl); + } + } else { + if (glyph_idx > (sd_size - 1)) { + sd->glyphs.append(gl); + } else { + sd->glyphs.set(glyph_idx, gl); + } + } + added_glyphs++; + } + // Add ellipsis dots. + for (int d = 0; d < 3; d++) { + TextServer::Glyph gl; + gl.start = sd_glyphs[ellipsis_pos].start; + gl.end = sd_glyphs[ellipsis_pos].end; + gl.count = 1; + gl.advance = dot_adv.x; + gl.index = dot_gl_idx; + gl.font_rid = last_gl_font_rid; + gl.font_size = last_gl_font_size; + gl.flags = GRAPHEME_IS_PUNCTUATION | GRAPHEME_IS_VIRTUAL | (is_rtl ? GRAPHEME_IS_RTL : 0); + + // Optimized glyph insertion by replacing a glyph whenever possible. + int glyph_idx = trim_pos + ((is_rtl) ? -added_glyphs : added_glyphs); + if (is_rtl) { + if (glyph_idx < 0) { + sd->glyphs.insert(0, gl); + } else { + sd->glyphs.set(glyph_idx, gl); + } + } else { + if (glyph_idx > (sd_size - 1)) { + sd->glyphs.append(gl); + } else { + sd->glyphs.set(glyph_idx, gl); + } + } + added_glyphs++; + } + } + + // Cut the remaining glyphs off. + if (!is_rtl) { + sd->glyphs.resize(trim_pos + added_glyphs); + } else { + for (int ridx = 0; ridx <= trim_pos - added_glyphs; ridx++) { + sd->glyphs.remove(0); + } + } + + // Update to correct width. + sd->width = width + ((ellipsis_pos != -1) ? ellipsis_advance : 0); + } +} + bool TextServerFallback::shaped_text_shape(RID p_shaped) { _THREAD_SAFE_METHOD_ ShapedTextData *sd = shaped_owner.getornull(p_shaped); |