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e5bebbc9ff
godot/scene/gui/label.cpp
Rindbee e5bebbc9ff Fix unnecessary break when calculating the height of visible lines 
This break causes the minsize to be smaller than expected, and then
the size keeps increasing by one line to cover all visible lines.
This can cause performance issues when there are many visible lines.
2023-05-20 23:04:20 +08:00

1050 lines
39 KiB
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/**************************************************************************/
/* label.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#include "label.h"
#include "core/config/project_settings.h"
#include "core/core_string_names.h"
#include "core/string/print_string.h"
#include "core/string/translation.h"
#include "servers/text_server.h"
void Label::set_autowrap_mode(TextServer::AutowrapMode p_mode) {
if (autowrap_mode == p_mode) {
return;
}
autowrap_mode = p_mode;
lines_dirty = true;
queue_redraw();
if (clip || overrun_behavior != TextServer::OVERRUN_NO_TRIMMING) {
update_minimum_size();
}
}
TextServer::AutowrapMode Label::get_autowrap_mode() const {
return autowrap_mode;
}
void Label::set_justification_flags(BitField<TextServer::JustificationFlag> p_flags) {
if (jst_flags == p_flags) {
return;
}
jst_flags = p_flags;
lines_dirty = true;
queue_redraw();
}
BitField<TextServer::JustificationFlag> Label::get_justification_flags() const {
return jst_flags;
}
void Label::set_uppercase(bool p_uppercase) {
if (uppercase == p_uppercase) {
return;
}
uppercase = p_uppercase;
dirty = true;
queue_redraw();
}
bool Label::is_uppercase() const {
return uppercase;
}
int Label::get_line_height(int p_line) const {
Ref<Font> font = (settings.is_valid() && settings->get_font().is_valid()) ? settings->get_font() : theme_cache.font;
if (p_line >= 0 && p_line < lines_rid.size()) {
return TS->shaped_text_get_size(lines_rid[p_line]).y;
} else if (lines_rid.size() > 0) {
int h = 0;
for (int i = 0; i < lines_rid.size(); i++) {
h = MAX(h, TS->shaped_text_get_size(lines_rid[i]).y);
}
return h;
} else {
int font_size = settings.is_valid() ? settings->get_font_size() : theme_cache.font_size;
return font->get_height(font_size);
}
}
void Label::_shape() {
Ref<StyleBox> style = theme_cache.normal_style;
int width = (get_size().width - style->get_minimum_size().width);
if (dirty || font_dirty) {
if (dirty) {
TS->shaped_text_clear(text_rid);
}
if (text_direction == Control::TEXT_DIRECTION_INHERITED) {
TS->shaped_text_set_direction(text_rid, is_layout_rtl() ? TextServer::DIRECTION_RTL : TextServer::DIRECTION_LTR);
} else {
TS->shaped_text_set_direction(text_rid, (TextServer::Direction)text_direction);
}
const Ref<Font> &font = (settings.is_valid() && settings->get_font().is_valid()) ? settings->get_font() : theme_cache.font;
int font_size = settings.is_valid() ? settings->get_font_size() : theme_cache.font_size;
ERR_FAIL_COND(font.is_null());
String txt = (uppercase) ? TS->string_to_upper(xl_text, language) : xl_text;
if (visible_chars >= 0 && visible_chars_behavior == TextServer::VC_CHARS_BEFORE_SHAPING) {
txt = txt.substr(0, visible_chars);
}
if (dirty) {
TS->shaped_text_add_string(text_rid, txt, font->get_rids(), font_size, font->get_opentype_features(), language);
} else {
int spans = TS->shaped_get_span_count(text_rid);
for (int i = 0; i < spans; i++) {
TS->shaped_set_span_update_font(text_rid, i, font->get_rids(), font_size, font->get_opentype_features());
}
}
for (int i = 0; i < TextServer::SPACING_MAX; i++) {
TS->shaped_text_set_spacing(text_rid, TextServer::SpacingType(i), font->get_spacing(TextServer::SpacingType(i)));
}
TS->shaped_text_set_bidi_override(text_rid, structured_text_parser(st_parser, st_args, txt));
dirty = false;
font_dirty = false;
lines_dirty = true;
}
if (lines_dirty) {
for (int i = 0; i < lines_rid.size(); i++) {
TS->free_rid(lines_rid[i]);
}
lines_rid.clear();
BitField<TextServer::LineBreakFlag> autowrap_flags = TextServer::BREAK_MANDATORY;
switch (autowrap_mode) {
case TextServer::AUTOWRAP_WORD_SMART:
autowrap_flags = TextServer::BREAK_WORD_BOUND | TextServer::BREAK_ADAPTIVE | TextServer::BREAK_MANDATORY;
break;
case TextServer::AUTOWRAP_WORD:
autowrap_flags = TextServer::BREAK_WORD_BOUND | TextServer::BREAK_MANDATORY;
break;
case TextServer::AUTOWRAP_ARBITRARY:
autowrap_flags = TextServer::BREAK_GRAPHEME_BOUND | TextServer::BREAK_MANDATORY;
break;
case TextServer::AUTOWRAP_OFF:
break;
}
autowrap_flags = autowrap_flags | TextServer::BREAK_TRIM_EDGE_SPACES;
PackedInt32Array line_breaks = TS->shaped_text_get_line_breaks(text_rid, width, 0, autowrap_flags);
for (int i = 0; i < line_breaks.size(); i = i + 2) {
RID line = TS->shaped_text_substr(text_rid, line_breaks[i], line_breaks[i + 1] - line_breaks[i]);
lines_rid.push_back(line);
}
}
if (xl_text.length() == 0) {
minsize = Size2(1, get_line_height());
return;
}
if (autowrap_mode == TextServer::AUTOWRAP_OFF) {
minsize.width = 0.0f;
for (int i = 0; i < lines_rid.size(); i++) {
if (minsize.width < TS->shaped_text_get_size(lines_rid[i]).x) {
minsize.width = TS->shaped_text_get_size(lines_rid[i]).x;
}
}
}
if (lines_dirty) {
BitField<TextServer::TextOverrunFlag> overrun_flags = TextServer::OVERRUN_NO_TRIM;
switch (overrun_behavior) {
case TextServer::OVERRUN_TRIM_WORD_ELLIPSIS:
overrun_flags.set_flag(TextServer::OVERRUN_TRIM);
overrun_flags.set_flag(TextServer::OVERRUN_TRIM_WORD_ONLY);
overrun_flags.set_flag(TextServer::OVERRUN_ADD_ELLIPSIS);
break;
case TextServer::OVERRUN_TRIM_ELLIPSIS:
overrun_flags.set_flag(TextServer::OVERRUN_TRIM);
overrun_flags.set_flag(TextServer::OVERRUN_ADD_ELLIPSIS);
break;
case TextServer::OVERRUN_TRIM_WORD:
overrun_flags.set_flag(TextServer::OVERRUN_TRIM);
overrun_flags.set_flag(TextServer::OVERRUN_TRIM_WORD_ONLY);
break;
case TextServer::OVERRUN_TRIM_CHAR:
overrun_flags.set_flag(TextServer::OVERRUN_TRIM);
break;
case TextServer::OVERRUN_NO_TRIMMING:
break;
}
// Fill after min_size calculation.
if (autowrap_mode != TextServer::AUTOWRAP_OFF) {
int visible_lines = get_visible_line_count();
bool lines_hidden = visible_lines > 0 && visible_lines < lines_rid.size();
if (lines_hidden) {
overrun_flags.set_flag(TextServer::OVERRUN_ENFORCE_ELLIPSIS);
}
if (horizontal_alignment == HORIZONTAL_ALIGNMENT_FILL) {
int jst_to_line = visible_lines;
if (lines_rid.size() == 1 && jst_flags.has_flag(TextServer::JUSTIFICATION_DO_NOT_SKIP_SINGLE_LINE)) {
jst_to_line = lines_rid.size();
} else {
if (jst_flags.has_flag(TextServer::JUSTIFICATION_SKIP_LAST_LINE)) {
jst_to_line = visible_lines - 1;
}
if (jst_flags.has_flag(TextServer::JUSTIFICATION_SKIP_LAST_LINE_WITH_VISIBLE_CHARS)) {
for (int i = visible_lines - 1; i >= 0; i--) {
if (TS->shaped_text_has_visible_chars(lines_rid[i])) {
jst_to_line = i;
break;
}
}
}
}
for (int i = 0; i < lines_rid.size(); i++) {
if (i < jst_to_line) {
TS->shaped_text_fit_to_width(lines_rid[i], width, jst_flags);
} else if (i == (visible_lines - 1)) {
TS->shaped_text_overrun_trim_to_width(lines_rid[i], width, overrun_flags);
}
}
} else if (lines_hidden) {
TS->shaped_text_overrun_trim_to_width(lines_rid[visible_lines - 1], width, overrun_flags);
}
} else {
// Autowrap disabled.
int jst_to_line = lines_rid.size();
if (lines_rid.size() == 1 && jst_flags.has_flag(TextServer::JUSTIFICATION_DO_NOT_SKIP_SINGLE_LINE)) {
jst_to_line = lines_rid.size();
} else {
if (jst_flags.has_flag(TextServer::JUSTIFICATION_SKIP_LAST_LINE)) {
jst_to_line = lines_rid.size() - 1;
}
if (jst_flags.has_flag(TextServer::JUSTIFICATION_SKIP_LAST_LINE_WITH_VISIBLE_CHARS)) {
for (int i = lines_rid.size() - 1; i >= 0; i--) {
if (TS->shaped_text_has_visible_chars(lines_rid[i])) {
jst_to_line = i;
break;
}
}
}
}
for (int i = 0; i < lines_rid.size(); i++) {
if (i < jst_to_line && horizontal_alignment == HORIZONTAL_ALIGNMENT_FILL) {
TS->shaped_text_fit_to_width(lines_rid[i], width, jst_flags);
overrun_flags.set_flag(TextServer::OVERRUN_JUSTIFICATION_AWARE);
TS->shaped_text_overrun_trim_to_width(lines_rid[i], width, overrun_flags);
TS->shaped_text_fit_to_width(lines_rid[i], width, jst_flags | TextServer::JUSTIFICATION_CONSTRAIN_ELLIPSIS);
} else {
TS->shaped_text_overrun_trim_to_width(lines_rid[i], width, overrun_flags);
}
}
}
lines_dirty = false;
}
_update_visible();
if (autowrap_mode == TextServer::AUTOWRAP_OFF || !clip || overrun_behavior == TextServer::OVERRUN_NO_TRIMMING) {
update_minimum_size();
}
}
void Label::_update_visible() {
int line_spacing = settings.is_valid() ? settings->get_line_spacing() : theme_cache.line_spacing;
Ref<StyleBox> style = theme_cache.normal_style;
int lines_visible = lines_rid.size();
if (max_lines_visible >= 0 && lines_visible > max_lines_visible) {
lines_visible = max_lines_visible;
}
minsize.height = 0;
int last_line = MIN(lines_rid.size(), lines_visible + lines_skipped);
for (int64_t i = lines_skipped; i < last_line; i++) {
minsize.height += TS->shaped_text_get_size(lines_rid[i]).y + line_spacing;
}
}
inline void draw_glyph(const Glyph &p_gl, const RID &p_canvas, const Color &p_font_color, const Vector2 &p_ofs) {
if (p_gl.font_rid != RID()) {
TS->font_draw_glyph(p_gl.font_rid, p_canvas, p_gl.font_size, p_ofs + Vector2(p_gl.x_off, p_gl.y_off), p_gl.index, p_font_color);
} else {
TS->draw_hex_code_box(p_canvas, p_gl.font_size, p_ofs + Vector2(p_gl.x_off, p_gl.y_off), p_gl.index, p_font_color);
}
}
inline void draw_glyph_outline(const Glyph &p_gl, const RID &p_canvas, const Color &p_font_color, const Color &p_font_shadow_color, const Color &p_font_outline_color, const int &p_shadow_outline_size, const int &p_outline_size, const Vector2 &p_ofs, const Vector2 &shadow_ofs) {
if (p_gl.font_rid != RID()) {
if (p_font_shadow_color.a > 0) {
TS->font_draw_glyph(p_gl.font_rid, p_canvas, p_gl.font_size, p_ofs + Vector2(p_gl.x_off, p_gl.y_off) + shadow_ofs, p_gl.index, p_font_shadow_color);
}
if (p_font_shadow_color.a > 0 && p_shadow_outline_size > 0) {
TS->font_draw_glyph_outline(p_gl.font_rid, p_canvas, p_gl.font_size, p_shadow_outline_size, p_ofs + Vector2(p_gl.x_off, p_gl.y_off) + shadow_ofs, p_gl.index, p_font_shadow_color);
}
if (p_font_outline_color.a != 0.0 && p_outline_size > 0) {
TS->font_draw_glyph_outline(p_gl.font_rid, p_canvas, p_gl.font_size, p_outline_size, p_ofs + Vector2(p_gl.x_off, p_gl.y_off), p_gl.index, p_font_outline_color);
}
}
}
void Label::_update_theme_item_cache() {
Control::_update_theme_item_cache();
theme_cache.normal_style = get_theme_stylebox(SNAME("normal"));
theme_cache.font = get_theme_font(SNAME("font"));
theme_cache.font_size = get_theme_font_size(SNAME("font_size"));
theme_cache.line_spacing = get_theme_constant(SNAME("line_spacing"));
theme_cache.font_color = get_theme_color(SNAME("font_color"));
theme_cache.font_shadow_color = get_theme_color(SNAME("font_shadow_color"));
theme_cache.font_shadow_offset = Point2(get_theme_constant(SNAME("shadow_offset_x")), get_theme_constant(SNAME("shadow_offset_y")));
theme_cache.font_outline_color = get_theme_color(SNAME("font_outline_color"));
theme_cache.font_outline_size = get_theme_constant(SNAME("outline_size"));
theme_cache.font_shadow_outline_size = get_theme_constant(SNAME("shadow_outline_size"));
}
PackedStringArray Label::get_configuration_warnings() const {
PackedStringArray warnings = Control::get_configuration_warnings();
// Ensure that the font can render all of the required glyphs.
Ref<Font> font;
if (settings.is_valid()) {
font = settings->get_font();
}
if (font.is_null()) {
font = theme_cache.font;
}
if (font.is_valid()) {
if (dirty || font_dirty || lines_dirty) {
const_cast<Label *>(this)->_shape();
}
const Glyph *glyph = TS->shaped_text_get_glyphs(text_rid);
int64_t glyph_count = TS->shaped_text_get_glyph_count(text_rid);
for (int64_t i = 0; i < glyph_count; i++) {
if (glyph[i].font_rid == RID()) {
warnings.push_back(RTR("The current font does not support rendering one or more characters used in this Label's text."));
break;
}
}
}
return warnings;
}
void Label::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_TRANSLATION_CHANGED: {
String new_text = atr(text);
if (new_text == xl_text) {
return; // Nothing new.
}
xl_text = new_text;
if (visible_ratio < 1) {
visible_chars = get_total_character_count() * visible_ratio;
}
dirty = true;
queue_redraw();
update_configuration_warnings();
} break;
case NOTIFICATION_LAYOUT_DIRECTION_CHANGED: {
queue_redraw();
} break;
case NOTIFICATION_DRAW: {
if (clip) {
RenderingServer::get_singleton()->canvas_item_set_clip(get_canvas_item(), true);
}
// When a shaped text is invalidated by an external source, we want to reshape it.
if (!TS->shaped_text_is_ready(text_rid)) {
dirty = true;
}
for (const RID &line_rid : lines_rid) {
if (!TS->shaped_text_is_ready(line_rid)) {
lines_dirty = true;
break;
}
}
if (dirty || font_dirty || lines_dirty) {
_shape();
}
RID ci = get_canvas_item();
bool has_settings = settings.is_valid();
Size2 string_size;
Size2 size = get_size();
Ref<StyleBox> style = theme_cache.normal_style;
Ref<Font> font = (has_settings && settings->get_font().is_valid()) ? settings->get_font() : theme_cache.font;
Color font_color = has_settings ? settings->get_font_color() : theme_cache.font_color;
Color font_shadow_color = has_settings ? settings->get_shadow_color() : theme_cache.font_shadow_color;
Point2 shadow_ofs = has_settings ? settings->get_shadow_offset() : theme_cache.font_shadow_offset;
int line_spacing = has_settings ? settings->get_line_spacing() : theme_cache.line_spacing;
Color font_outline_color = has_settings ? settings->get_outline_color() : theme_cache.font_outline_color;
int outline_size = has_settings ? settings->get_outline_size() : theme_cache.font_outline_size;
int shadow_outline_size = has_settings ? settings->get_shadow_size() : theme_cache.font_shadow_outline_size;
bool rtl = (TS->shaped_text_get_inferred_direction(text_rid) == TextServer::DIRECTION_RTL);
bool rtl_layout = is_layout_rtl();
style->draw(ci, Rect2(Point2(0, 0), get_size()));
float total_h = 0.0;
int lines_visible = 0;
// Get number of lines to fit to the height.
for (int64_t i = lines_skipped; i < lines_rid.size(); i++) {
total_h += TS->shaped_text_get_size(lines_rid[i]).y + line_spacing;
if (total_h > (get_size().height - style->get_minimum_size().height + line_spacing)) {
break;
}
lines_visible++;
}
if (max_lines_visible >= 0 && lines_visible > max_lines_visible) {
lines_visible = max_lines_visible;
}
int last_line = MIN(lines_rid.size(), lines_visible + lines_skipped);
bool trim_chars = (visible_chars >= 0) && (visible_chars_behavior == TextServer::VC_CHARS_AFTER_SHAPING);
bool trim_glyphs_ltr = (visible_chars >= 0) && ((visible_chars_behavior == TextServer::VC_GLYPHS_LTR) || ((visible_chars_behavior == TextServer::VC_GLYPHS_AUTO) && !rtl_layout));
bool trim_glyphs_rtl = (visible_chars >= 0) && ((visible_chars_behavior == TextServer::VC_GLYPHS_RTL) || ((visible_chars_behavior == TextServer::VC_GLYPHS_AUTO) && rtl_layout));
// Get real total height.
int total_glyphs = 0;
total_h = 0;
for (int64_t i = lines_skipped; i < last_line; i++) {
total_h += TS->shaped_text_get_size(lines_rid[i]).y + line_spacing;
total_glyphs += TS->shaped_text_get_glyph_count(lines_rid[i]) + TS->shaped_text_get_ellipsis_glyph_count(lines_rid[i]);
}
int visible_glyphs = total_glyphs * visible_ratio;
int processed_glyphs = 0;
total_h += style->get_margin(SIDE_TOP) + style->get_margin(SIDE_BOTTOM);
int vbegin = 0, vsep = 0;
if (lines_visible > 0) {
switch (vertical_alignment) {
case VERTICAL_ALIGNMENT_TOP: {
// Nothing.
} break;
case VERTICAL_ALIGNMENT_CENTER: {
vbegin = (size.y - (total_h - line_spacing)) / 2;
vsep = 0;
} break;
case VERTICAL_ALIGNMENT_BOTTOM: {
vbegin = size.y - (total_h - line_spacing);
vsep = 0;
} break;
case VERTICAL_ALIGNMENT_FILL: {
vbegin = 0;
if (lines_visible > 1) {
vsep = (size.y - (total_h - line_spacing)) / (lines_visible - 1);
} else {
vsep = 0;
}
} break;
}
}
Vector2 ofs;
ofs.y = style->get_offset().y + vbegin;
for (int i = lines_skipped; i < last_line; i++) {
Size2 line_size = TS->shaped_text_get_size(lines_rid[i]);
ofs.x = 0;
ofs.y += TS->shaped_text_get_ascent(lines_rid[i]);
switch (horizontal_alignment) {
case HORIZONTAL_ALIGNMENT_FILL:
if (rtl && autowrap_mode != TextServer::AUTOWRAP_OFF) {
ofs.x = int(size.width - style->get_margin(SIDE_RIGHT) - line_size.width);
} else {
ofs.x = style->get_offset().x;
}
break;
case HORIZONTAL_ALIGNMENT_LEFT: {
if (rtl_layout) {
ofs.x = int(size.width - style->get_margin(SIDE_RIGHT) - line_size.width);
} else {
ofs.x = style->get_offset().x;
}
} break;
case HORIZONTAL_ALIGNMENT_CENTER: {
ofs.x = int(size.width - line_size.width) / 2;
} break;
case HORIZONTAL_ALIGNMENT_RIGHT: {
if (rtl_layout) {
ofs.x = style->get_offset().x;
} else {
ofs.x = int(size.width - style->get_margin(SIDE_RIGHT) - line_size.width);
}
} break;
}
const Glyph *glyphs = TS->shaped_text_get_glyphs(lines_rid[i]);
int gl_size = TS->shaped_text_get_glyph_count(lines_rid[i]);
int ellipsis_pos = TS->shaped_text_get_ellipsis_pos(lines_rid[i]);
int trim_pos = TS->shaped_text_get_trim_pos(lines_rid[i]);
const Glyph *ellipsis_glyphs = TS->shaped_text_get_ellipsis_glyphs(lines_rid[i]);
int ellipsis_gl_size = TS->shaped_text_get_ellipsis_glyph_count(lines_rid[i]);
// Draw outline. Note: Do not merge this into the single loop with the main text, to prevent overlaps.
int processed_glyphs_ol = processed_glyphs;
if ((outline_size > 0 && font_outline_color.a != 0) || (font_shadow_color.a != 0)) {
Vector2 offset = ofs;
// Draw RTL ellipsis string when necessary.
if (rtl && ellipsis_pos >= 0) {
for (int gl_idx = ellipsis_gl_size - 1; gl_idx >= 0; gl_idx--) {
for (int j = 0; j < ellipsis_glyphs[gl_idx].repeat; j++) {
bool skip = (trim_chars && ellipsis_glyphs[gl_idx].end > visible_chars) || (trim_glyphs_ltr && (processed_glyphs_ol >= visible_glyphs)) || (trim_glyphs_rtl && (processed_glyphs_ol < total_glyphs - visible_glyphs));
//Draw glyph outlines and shadow.
if (!skip) {
draw_glyph_outline(ellipsis_glyphs[gl_idx], ci, font_color, font_shadow_color, font_outline_color, shadow_outline_size, outline_size, offset, shadow_ofs);
}
processed_glyphs_ol++;
offset.x += ellipsis_glyphs[gl_idx].advance;
}
}
}
// Draw main text.
for (int j = 0; j < gl_size; j++) {
// Trim when necessary.
if (trim_pos >= 0) {
if (rtl) {
if (j < trim_pos) {
continue;
}
} else {
if (j >= trim_pos) {
break;
}
}
}
for (int k = 0; k < glyphs[j].repeat; k++) {
bool skip = (trim_chars && glyphs[j].end > visible_chars) || (trim_glyphs_ltr && (processed_glyphs_ol >= visible_glyphs)) || (trim_glyphs_rtl && (processed_glyphs_ol < total_glyphs - visible_glyphs));
// Draw glyph outlines and shadow.
if (!skip) {
draw_glyph_outline(glyphs[j], ci, font_color, font_shadow_color, font_outline_color, shadow_outline_size, outline_size, offset, shadow_ofs);
}
processed_glyphs_ol++;
offset.x += glyphs[j].advance;
}
}
// Draw LTR ellipsis string when necessary.
if (!rtl && ellipsis_pos >= 0) {
for (int gl_idx = 0; gl_idx < ellipsis_gl_size; gl_idx++) {
for (int j = 0; j < ellipsis_glyphs[gl_idx].repeat; j++) {
bool skip = (trim_chars && ellipsis_glyphs[gl_idx].end > visible_chars) || (trim_glyphs_ltr && (processed_glyphs_ol >= visible_glyphs)) || (trim_glyphs_rtl && (processed_glyphs_ol < total_glyphs - visible_glyphs));
//Draw glyph outlines and shadow.
if (!skip) {
draw_glyph_outline(ellipsis_glyphs[gl_idx], ci, font_color, font_shadow_color, font_outline_color, shadow_outline_size, outline_size, offset, shadow_ofs);
}
processed_glyphs_ol++;
offset.x += ellipsis_glyphs[gl_idx].advance;
}
}
}
}
// Draw main text. Note: Do not merge this into the single loop with the outline, to prevent overlaps.
// Draw RTL ellipsis string when necessary.
if (rtl && ellipsis_pos >= 0) {
for (int gl_idx = ellipsis_gl_size - 1; gl_idx >= 0; gl_idx--) {
for (int j = 0; j < ellipsis_glyphs[gl_idx].repeat; j++) {
bool skip = (trim_chars && ellipsis_glyphs[gl_idx].end > visible_chars) || (trim_glyphs_ltr && (processed_glyphs >= visible_glyphs)) || (trim_glyphs_rtl && (processed_glyphs < total_glyphs - visible_glyphs));
//Draw glyph outlines and shadow.
if (!skip) {
draw_glyph(ellipsis_glyphs[gl_idx], ci, font_color, ofs);
}
processed_glyphs++;
ofs.x += ellipsis_glyphs[gl_idx].advance;
}
}
}
// Draw main text.
for (int j = 0; j < gl_size; j++) {
// Trim when necessary.
if (trim_pos >= 0) {
if (rtl) {
if (j < trim_pos) {
continue;
}
} else {
if (j >= trim_pos) {
break;
}
}
}
for (int k = 0; k < glyphs[j].repeat; k++) {
bool skip = (trim_chars && glyphs[j].end > visible_chars) || (trim_glyphs_ltr && (processed_glyphs >= visible_glyphs)) || (trim_glyphs_rtl && (processed_glyphs < total_glyphs - visible_glyphs));
// Draw glyph outlines and shadow.
if (!skip) {
draw_glyph(glyphs[j], ci, font_color, ofs);
}
processed_glyphs++;
ofs.x += glyphs[j].advance;
}
}
// Draw LTR ellipsis string when necessary.
if (!rtl && ellipsis_pos >= 0) {
for (int gl_idx = 0; gl_idx < ellipsis_gl_size; gl_idx++) {
for (int j = 0; j < ellipsis_glyphs[gl_idx].repeat; j++) {
bool skip = (trim_chars && ellipsis_glyphs[gl_idx].end > visible_chars) || (trim_glyphs_ltr && (processed_glyphs >= visible_glyphs)) || (trim_glyphs_rtl && (processed_glyphs < total_glyphs - visible_glyphs));
//Draw glyph outlines and shadow.
if (!skip) {
draw_glyph(ellipsis_glyphs[gl_idx], ci, font_color, ofs);
}
processed_glyphs++;
ofs.x += ellipsis_glyphs[gl_idx].advance;
}
}
}
ofs.y += TS->shaped_text_get_descent(lines_rid[i]) + vsep + line_spacing;
}
} break;
case NOTIFICATION_THEME_CHANGED: {
font_dirty = true;
queue_redraw();
} break;
case NOTIFICATION_RESIZED: {
lines_dirty = true;
} break;
}
}
Size2 Label::get_minimum_size() const {
// don't want to mutable everything
if (dirty || font_dirty || lines_dirty) {
const_cast<Label *>(this)->_shape();
}
Size2 min_size = minsize;
const Ref<Font> &font = (settings.is_valid() && settings->get_font().is_valid()) ? settings->get_font() : theme_cache.font;
int font_size = settings.is_valid() ? settings->get_font_size() : theme_cache.font_size;
min_size.height = MAX(min_size.height, font->get_height(font_size) + font->get_spacing(TextServer::SPACING_TOP) + font->get_spacing(TextServer::SPACING_BOTTOM));
Size2 min_style = theme_cache.normal_style->get_minimum_size();
if (autowrap_mode != TextServer::AUTOWRAP_OFF) {
return Size2(1, (clip || overrun_behavior != TextServer::OVERRUN_NO_TRIMMING) ? 1 : min_size.height) + min_style;
} else {
if (clip || overrun_behavior != TextServer::OVERRUN_NO_TRIMMING) {
min_size.width = 1;
}
return min_size + min_style;
}
}
int Label::get_line_count() const {
if (!is_inside_tree()) {
return 1;
}
if (dirty || font_dirty || lines_dirty) {
const_cast<Label *>(this)->_shape();
}
return lines_rid.size();
}
int Label::get_visible_line_count() const {
Ref<StyleBox> style = theme_cache.normal_style;
int line_spacing = settings.is_valid() ? settings->get_line_spacing() : theme_cache.line_spacing;
int lines_visible = 0;
float total_h = 0.0;
for (int64_t i = lines_skipped; i < lines_rid.size(); i++) {
total_h += TS->shaped_text_get_size(lines_rid[i]).y + line_spacing;
if (total_h > (get_size().height - style->get_minimum_size().height + line_spacing)) {
break;
}
lines_visible++;
}
if (lines_visible > lines_rid.size()) {
lines_visible = lines_rid.size();
}
if (max_lines_visible >= 0 && lines_visible > max_lines_visible) {
lines_visible = max_lines_visible;
}
return lines_visible;
}
void Label::set_horizontal_alignment(HorizontalAlignment p_alignment) {
ERR_FAIL_INDEX((int)p_alignment, 4);
if (horizontal_alignment == p_alignment) {
return;
}
if (horizontal_alignment == HORIZONTAL_ALIGNMENT_FILL || p_alignment == HORIZONTAL_ALIGNMENT_FILL) {
lines_dirty = true; // Reshape lines.
}
horizontal_alignment = p_alignment;
queue_redraw();
}
HorizontalAlignment Label::get_horizontal_alignment() const {
return horizontal_alignment;
}
void Label::set_vertical_alignment(VerticalAlignment p_alignment) {
ERR_FAIL_INDEX((int)p_alignment, 4);
if (vertical_alignment == p_alignment) {
return;
}
vertical_alignment = p_alignment;
queue_redraw();
}
VerticalAlignment Label::get_vertical_alignment() const {
return vertical_alignment;
}
void Label::set_text(const String &p_string) {
if (text == p_string) {
return;
}
text = p_string;
xl_text = atr(p_string);
dirty = true;
if (visible_ratio < 1) {
visible_chars = get_total_character_count() * visible_ratio;
}
queue_redraw();
update_minimum_size();
update_configuration_warnings();
}
void Label::_invalidate() {
font_dirty = true;
queue_redraw();
}
void Label::set_label_settings(const Ref<LabelSettings> &p_settings) {
if (settings != p_settings) {
if (settings.is_valid()) {
settings->disconnect(CoreStringNames::get_singleton()->changed, callable_mp(this, &Label::_invalidate));
}
settings = p_settings;
if (settings.is_valid()) {
settings->connect(CoreStringNames::get_singleton()->changed, callable_mp(this, &Label::_invalidate), CONNECT_REFERENCE_COUNTED);
}
_invalidate();
}
}
Ref<LabelSettings> Label::get_label_settings() const {
return settings;
}
void Label::set_text_direction(Control::TextDirection p_text_direction) {
ERR_FAIL_COND((int)p_text_direction < -1 || (int)p_text_direction > 3);
if (text_direction != p_text_direction) {
text_direction = p_text_direction;
font_dirty = true;
queue_redraw();
}
}
void Label::set_structured_text_bidi_override(TextServer::StructuredTextParser p_parser) {
if (st_parser != p_parser) {
st_parser = p_parser;
dirty = true;
queue_redraw();
}
}
TextServer::StructuredTextParser Label::get_structured_text_bidi_override() const {
return st_parser;
}
void Label::set_structured_text_bidi_override_options(Array p_args) {
if (st_args == p_args) {
return;
}
st_args = p_args;
dirty = true;
queue_redraw();
}
Array Label::get_structured_text_bidi_override_options() const {
return st_args;
}
Control::TextDirection Label::get_text_direction() const {
return text_direction;
}
void Label::set_language(const String &p_language) {
if (language != p_language) {
language = p_language;
dirty = true;
queue_redraw();
}
}
String Label::get_language() const {
return language;
}
void Label::set_clip_text(bool p_clip) {
if (clip == p_clip) {
return;
}
clip = p_clip;
queue_redraw();
update_minimum_size();
}
bool Label::is_clipping_text() const {
return clip;
}
void Label::set_text_overrun_behavior(TextServer::OverrunBehavior p_behavior) {
if (overrun_behavior == p_behavior) {
return;
}
overrun_behavior = p_behavior;
lines_dirty = true;
queue_redraw();
if (clip || overrun_behavior != TextServer::OVERRUN_NO_TRIMMING) {
update_minimum_size();
}
}
TextServer::OverrunBehavior Label::get_text_overrun_behavior() const {
return overrun_behavior;
}
String Label::get_text() const {
return text;
}
void Label::set_visible_characters(int p_amount) {
if (visible_chars != p_amount) {
visible_chars = p_amount;
if (get_total_character_count() > 0) {
visible_ratio = (float)p_amount / (float)get_total_character_count();
} else {
visible_ratio = 1.0;
}
if (visible_chars_behavior == TextServer::VC_CHARS_BEFORE_SHAPING) {
dirty = true;
}
queue_redraw();
}
}
int Label::get_visible_characters() const {
return visible_chars;
}
void Label::set_visible_ratio(float p_ratio) {
if (visible_ratio != p_ratio) {
if (p_ratio >= 1.0) {
visible_chars = -1;
visible_ratio = 1.0;
} else if (p_ratio < 0.0) {
visible_chars = 0;
visible_ratio = 0.0;
} else {
visible_chars = get_total_character_count() * p_ratio;
visible_ratio = p_ratio;
}
if (visible_chars_behavior == TextServer::VC_CHARS_BEFORE_SHAPING) {
dirty = true;
}
queue_redraw();
}
}
float Label::get_visible_ratio() const {
return visible_ratio;
}
TextServer::VisibleCharactersBehavior Label::get_visible_characters_behavior() const {
return visible_chars_behavior;
}
void Label::set_visible_characters_behavior(TextServer::VisibleCharactersBehavior p_behavior) {
if (visible_chars_behavior != p_behavior) {
visible_chars_behavior = p_behavior;
dirty = true;
queue_redraw();
}
}
void Label::set_lines_skipped(int p_lines) {
ERR_FAIL_COND(p_lines < 0);
if (lines_skipped == p_lines) {
return;
}
lines_skipped = p_lines;
_update_visible();
queue_redraw();
}
int Label::get_lines_skipped() const {
return lines_skipped;
}
void Label::set_max_lines_visible(int p_lines) {
if (max_lines_visible == p_lines) {
return;
}
max_lines_visible = p_lines;
_update_visible();
queue_redraw();
}
int Label::get_max_lines_visible() const {
return max_lines_visible;
}
int Label::get_total_character_count() const {
if (dirty || font_dirty || lines_dirty) {
const_cast<Label *>(this)->_shape();
}
return xl_text.length();
}
void Label::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_horizontal_alignment", "alignment"), &Label::set_horizontal_alignment);
ClassDB::bind_method(D_METHOD("get_horizontal_alignment"), &Label::get_horizontal_alignment);
ClassDB::bind_method(D_METHOD("set_vertical_alignment", "alignment"), &Label::set_vertical_alignment);
ClassDB::bind_method(D_METHOD("get_vertical_alignment"), &Label::get_vertical_alignment);
ClassDB::bind_method(D_METHOD("set_text", "text"), &Label::set_text);
ClassDB::bind_method(D_METHOD("get_text"), &Label::get_text);
ClassDB::bind_method(D_METHOD("set_label_settings", "settings"), &Label::set_label_settings);
ClassDB::bind_method(D_METHOD("get_label_settings"), &Label::get_label_settings);
ClassDB::bind_method(D_METHOD("set_text_direction", "direction"), &Label::set_text_direction);
ClassDB::bind_method(D_METHOD("get_text_direction"), &Label::get_text_direction);
ClassDB::bind_method(D_METHOD("set_language", "language"), &Label::set_language);
ClassDB::bind_method(D_METHOD("get_language"), &Label::get_language);
ClassDB::bind_method(D_METHOD("set_autowrap_mode", "autowrap_mode"), &Label::set_autowrap_mode);
ClassDB::bind_method(D_METHOD("get_autowrap_mode"), &Label::get_autowrap_mode);
ClassDB::bind_method(D_METHOD("set_justification_flags", "justification_flags"), &Label::set_justification_flags);
ClassDB::bind_method(D_METHOD("get_justification_flags"), &Label::get_justification_flags);
ClassDB::bind_method(D_METHOD("set_clip_text", "enable"), &Label::set_clip_text);
ClassDB::bind_method(D_METHOD("is_clipping_text"), &Label::is_clipping_text);
ClassDB::bind_method(D_METHOD("set_text_overrun_behavior", "overrun_behavior"), &Label::set_text_overrun_behavior);
ClassDB::bind_method(D_METHOD("get_text_overrun_behavior"), &Label::get_text_overrun_behavior);
ClassDB::bind_method(D_METHOD("set_uppercase", "enable"), &Label::set_uppercase);
ClassDB::bind_method(D_METHOD("is_uppercase"), &Label::is_uppercase);
ClassDB::bind_method(D_METHOD("get_line_height", "line"), &Label::get_line_height, DEFVAL(-1));
ClassDB::bind_method(D_METHOD("get_line_count"), &Label::get_line_count);
ClassDB::bind_method(D_METHOD("get_visible_line_count"), &Label::get_visible_line_count);
ClassDB::bind_method(D_METHOD("get_total_character_count"), &Label::get_total_character_count);
ClassDB::bind_method(D_METHOD("set_visible_characters", "amount"), &Label::set_visible_characters);
ClassDB::bind_method(D_METHOD("get_visible_characters"), &Label::get_visible_characters);
ClassDB::bind_method(D_METHOD("get_visible_characters_behavior"), &Label::get_visible_characters_behavior);
ClassDB::bind_method(D_METHOD("set_visible_characters_behavior", "behavior"), &Label::set_visible_characters_behavior);
ClassDB::bind_method(D_METHOD("set_visible_ratio", "ratio"), &Label::set_visible_ratio);
ClassDB::bind_method(D_METHOD("get_visible_ratio"), &Label::get_visible_ratio);
ClassDB::bind_method(D_METHOD("set_lines_skipped", "lines_skipped"), &Label::set_lines_skipped);
ClassDB::bind_method(D_METHOD("get_lines_skipped"), &Label::get_lines_skipped);
ClassDB::bind_method(D_METHOD("set_max_lines_visible", "lines_visible"), &Label::set_max_lines_visible);
ClassDB::bind_method(D_METHOD("get_max_lines_visible"), &Label::get_max_lines_visible);
ClassDB::bind_method(D_METHOD("set_structured_text_bidi_override", "parser"), &Label::set_structured_text_bidi_override);
ClassDB::bind_method(D_METHOD("get_structured_text_bidi_override"), &Label::get_structured_text_bidi_override);
ClassDB::bind_method(D_METHOD("set_structured_text_bidi_override_options", "args"), &Label::set_structured_text_bidi_override_options);
ClassDB::bind_method(D_METHOD("get_structured_text_bidi_override_options"), &Label::get_structured_text_bidi_override_options);
ADD_PROPERTY(PropertyInfo(Variant::STRING, "text", PROPERTY_HINT_MULTILINE_TEXT), "set_text", "get_text");
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "label_settings", PROPERTY_HINT_RESOURCE_TYPE, "LabelSettings"), "set_label_settings", "get_label_settings");
ADD_PROPERTY(PropertyInfo(Variant::INT, "horizontal_alignment", PROPERTY_HINT_ENUM, "Left,Center,Right,Fill"), "set_horizontal_alignment", "get_horizontal_alignment");
ADD_PROPERTY(PropertyInfo(Variant::INT, "vertical_alignment", PROPERTY_HINT_ENUM, "Top,Center,Bottom,Fill"), "set_vertical_alignment", "get_vertical_alignment");
ADD_PROPERTY(PropertyInfo(Variant::INT, "autowrap_mode", PROPERTY_HINT_ENUM, "Off,Arbitrary,Word,Word (Smart)"), "set_autowrap_mode", "get_autowrap_mode");
ADD_PROPERTY(PropertyInfo(Variant::INT, "justification_flags", PROPERTY_HINT_FLAGS, "Kashida Justification:1,Word Justification:2,Justify Only After Last Tab:8,Skip Last Line:32,Skip Last Line With Visible Characters:64,Do Not Skip Single Line:128"), "set_justification_flags", "get_justification_flags");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "clip_text"), "set_clip_text", "is_clipping_text");
ADD_PROPERTY(PropertyInfo(Variant::INT, "text_overrun_behavior", PROPERTY_HINT_ENUM, "Trim Nothing,Trim Characters,Trim Words,Ellipsis,Word Ellipsis"), "set_text_overrun_behavior", "get_text_overrun_behavior");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "uppercase"), "set_uppercase", "is_uppercase");
ADD_GROUP("Displayed Text", "");
ADD_PROPERTY(PropertyInfo(Variant::INT, "lines_skipped", PROPERTY_HINT_RANGE, "0,999,1"), "set_lines_skipped", "get_lines_skipped");
ADD_PROPERTY(PropertyInfo(Variant::INT, "max_lines_visible", PROPERTY_HINT_RANGE, "-1,999,1"), "set_max_lines_visible", "get_max_lines_visible");
// Note: "visible_characters" and "visible_ratio" should be set after "text" to be correctly applied.
ADD_PROPERTY(PropertyInfo(Variant::INT, "visible_characters", PROPERTY_HINT_RANGE, "-1,128000,1"), "set_visible_characters", "get_visible_characters");
ADD_PROPERTY(PropertyInfo(Variant::INT, "visible_characters_behavior", PROPERTY_HINT_ENUM, "Characters Before Shaping,Characters After Shaping,Glyphs (Layout Direction),Glyphs (Left-to-Right),Glyphs (Right-to-Left)"), "set_visible_characters_behavior", "get_visible_characters_behavior");
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "visible_ratio", PROPERTY_HINT_RANGE, "0,1,0.001"), "set_visible_ratio", "get_visible_ratio");
ADD_GROUP("BiDi", "");
ADD_PROPERTY(PropertyInfo(Variant::INT, "text_direction", PROPERTY_HINT_ENUM, "Auto,Left-to-Right,Right-to-Left,Inherited"), "set_text_direction", "get_text_direction");
ADD_PROPERTY(PropertyInfo(Variant::STRING, "language", PROPERTY_HINT_LOCALE_ID, ""), "set_language", "get_language");
ADD_PROPERTY(PropertyInfo(Variant::INT, "structured_text_bidi_override", PROPERTY_HINT_ENUM, "Default,URI,File,Email,List,None,Custom"), "set_structured_text_bidi_override", "get_structured_text_bidi_override");
ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "structured_text_bidi_override_options"), "set_structured_text_bidi_override_options", "get_structured_text_bidi_override_options");
}
Label::Label(const String &p_text) {
text_rid = TS->create_shaped_text();
set_mouse_filter(MOUSE_FILTER_IGNORE);
set_text(p_text);
set_v_size_flags(SIZE_SHRINK_CENTER);
}
Label::~Label() {
for (int i = 0; i < lines_rid.size(); i++) {
TS->free_rid(lines_rid[i]);
}
lines_rid.clear();
TS->free_rid(text_rid);
}
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