709 lines
21 KiB
C++
709 lines
21 KiB
C++
/*************************************************************************/
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/* label.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "label.h"
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#include "core/print_string.h"
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#include "core/project_settings.h"
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#include "core/translation.h"
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void Label::set_autowrap(bool p_autowrap) {
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if (autowrap == p_autowrap) {
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return;
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}
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autowrap = p_autowrap;
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word_cache_dirty = true;
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update();
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if (clip) {
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minimum_size_changed();
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}
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}
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bool Label::has_autowrap() const {
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return autowrap;
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}
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void Label::set_uppercase(bool p_uppercase) {
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uppercase = p_uppercase;
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word_cache_dirty = true;
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update();
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}
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bool Label::is_uppercase() const {
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return uppercase;
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}
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int Label::get_line_height() const {
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return get_font("font")->get_height();
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}
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void Label::_notification(int p_what) {
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if (p_what == NOTIFICATION_TRANSLATION_CHANGED) {
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String new_text = tr(text);
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if (new_text == xl_text) {
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return; //nothing new
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}
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xl_text = new_text;
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regenerate_word_cache();
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update();
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}
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if (p_what == NOTIFICATION_DRAW) {
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if (clip) {
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VisualServer::get_singleton()->canvas_item_set_clip(get_canvas_item(), true);
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}
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if (word_cache_dirty) {
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regenerate_word_cache();
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}
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RID ci = get_canvas_item();
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Size2 string_size;
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Size2 size = get_size();
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Ref<StyleBox> style = get_stylebox("normal");
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Ref<Font> font = get_font("font");
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Color font_color = get_color("font_color");
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Color font_color_shadow = get_color("font_color_shadow");
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bool use_outline = get_constant("shadow_as_outline");
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Point2 shadow_ofs(get_constant("shadow_offset_x"), get_constant("shadow_offset_y"));
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int line_spacing = get_constant("line_spacing");
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Color font_outline_modulate = get_color("font_outline_modulate");
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style->draw(ci, Rect2(Point2(0, 0), get_size()));
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VisualServer::get_singleton()->canvas_item_set_distance_field_mode(get_canvas_item(), font.is_valid() && font->is_distance_field_hint());
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int font_h = font->get_height() + line_spacing;
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int lines_visible = (size.y + line_spacing) / font_h;
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real_t space_w = font->get_char_size(' ').width;
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int chars_total = 0;
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int vbegin = 0, vsep = 0;
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if (lines_visible > line_count) {
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lines_visible = line_count;
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}
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if (max_lines_visible >= 0 && lines_visible > max_lines_visible) {
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lines_visible = max_lines_visible;
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}
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if (lines_visible > 0) {
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switch (valign) {
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case VALIGN_TOP: {
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//nothing
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} break;
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case VALIGN_CENTER: {
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vbegin = (size.y - (lines_visible * font_h - line_spacing)) / 2;
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vsep = 0;
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} break;
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case VALIGN_BOTTOM: {
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vbegin = size.y - (lines_visible * font_h - line_spacing);
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vsep = 0;
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} break;
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case VALIGN_FILL: {
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vbegin = 0;
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if (lines_visible > 1) {
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vsep = (size.y - (lines_visible * font_h - line_spacing)) / (lines_visible - 1);
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} else {
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vsep = 0;
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}
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} break;
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}
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}
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WordCache *wc = word_cache;
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if (!wc) {
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return;
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}
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int line = 0;
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int line_to = lines_skipped + (lines_visible > 0 ? lines_visible : 1);
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FontDrawer drawer(font, font_outline_modulate);
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while (wc) {
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/* handle lines not meant to be drawn quickly */
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if (line >= line_to) {
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break;
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}
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if (line < lines_skipped) {
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while (wc && wc->char_pos >= 0) {
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wc = wc->next;
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}
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if (wc) {
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wc = wc->next;
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}
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line++;
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continue;
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}
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/* handle lines normally */
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if (wc->char_pos < 0) {
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//empty line
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wc = wc->next;
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line++;
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continue;
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}
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WordCache *from = wc;
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WordCache *to = wc;
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int taken = 0;
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int spaces = 0;
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while (to && to->char_pos >= 0) {
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taken += to->pixel_width;
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if (to->space_count) {
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spaces += to->space_count;
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}
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to = to->next;
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}
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bool can_fill = to && to->char_pos == WordCache::CHAR_WRAPLINE;
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float x_ofs = 0;
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switch (align) {
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case ALIGN_FILL:
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case ALIGN_LEFT: {
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x_ofs = style->get_offset().x;
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} break;
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case ALIGN_CENTER: {
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x_ofs = int(size.width - (taken + spaces * space_w)) / 2;
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} break;
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case ALIGN_RIGHT: {
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x_ofs = int(size.width - style->get_margin(MARGIN_RIGHT) - (taken + spaces * space_w));
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} break;
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}
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float y_ofs = style->get_offset().y;
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y_ofs += (line - lines_skipped) * font_h + font->get_ascent();
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y_ofs += vbegin + line * vsep;
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while (from != to) {
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// draw a word
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int pos = from->char_pos;
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if (from->char_pos < 0) {
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ERR_PRINT("BUG");
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return;
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}
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if (from->space_count) {
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/* spacing */
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x_ofs += space_w * from->space_count;
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if (can_fill && align == ALIGN_FILL && spaces) {
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x_ofs += int((size.width - (taken + space_w * spaces)) / spaces);
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}
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}
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if (font_color_shadow.a > 0) {
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int chars_total_shadow = chars_total; //save chars drawn
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float x_ofs_shadow = x_ofs;
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for (int i = 0; i < from->word_len; i++) {
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if (visible_chars < 0 || chars_total_shadow < visible_chars) {
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CharType c = xl_text[i + pos];
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CharType n = xl_text[i + pos + 1];
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if (uppercase) {
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c = String::char_uppercase(c);
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n = String::char_uppercase(n);
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}
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float move = drawer.draw_char(ci, Point2(x_ofs_shadow, y_ofs) + shadow_ofs, c, n, font_color_shadow);
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if (use_outline) {
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drawer.draw_char(ci, Point2(x_ofs_shadow, y_ofs) + Vector2(-shadow_ofs.x, shadow_ofs.y), c, n, font_color_shadow);
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drawer.draw_char(ci, Point2(x_ofs_shadow, y_ofs) + Vector2(shadow_ofs.x, -shadow_ofs.y), c, n, font_color_shadow);
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drawer.draw_char(ci, Point2(x_ofs_shadow, y_ofs) + Vector2(-shadow_ofs.x, -shadow_ofs.y), c, n, font_color_shadow);
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}
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x_ofs_shadow += move;
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chars_total_shadow++;
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}
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}
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}
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for (int i = 0; i < from->word_len; i++) {
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if (visible_chars < 0 || chars_total < visible_chars) {
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CharType c = xl_text[i + pos];
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CharType n = xl_text[i + pos + 1];
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if (uppercase) {
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c = String::char_uppercase(c);
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n = String::char_uppercase(n);
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}
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x_ofs += drawer.draw_char(ci, Point2(x_ofs, y_ofs), c, n, font_color);
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chars_total++;
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}
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}
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from = from->next;
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}
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wc = to ? to->next : nullptr;
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line++;
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}
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}
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if (p_what == NOTIFICATION_THEME_CHANGED) {
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word_cache_dirty = true;
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update();
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}
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if (p_what == NOTIFICATION_RESIZED) {
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word_cache_dirty = true;
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}
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}
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Size2 Label::get_minimum_size() const {
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Size2 min_style = get_stylebox("normal")->get_minimum_size();
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// don't want to mutable everything
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if (word_cache_dirty) {
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const_cast<Label *>(this)->regenerate_word_cache();
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}
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if (autowrap) {
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return Size2(1, clip ? 1 : minsize.height) + min_style;
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} else {
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Size2 ms = minsize;
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if (clip) {
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ms.width = 1;
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}
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return ms + min_style;
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}
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}
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int Label::get_longest_line_width() const {
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Ref<Font> font = get_font("font");
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real_t max_line_width = 0;
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real_t line_width = 0;
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for (int i = 0; i < xl_text.size(); i++) {
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CharType current = xl_text[i];
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if (uppercase) {
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current = String::char_uppercase(current);
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}
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if (current < 32) {
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if (current == '\n') {
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if (line_width > max_line_width) {
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max_line_width = line_width;
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}
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line_width = 0;
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}
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} else {
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real_t char_width = font->get_char_size(current, xl_text[i + 1]).width;
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line_width += char_width;
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}
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}
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if (line_width > max_line_width) {
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max_line_width = line_width;
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}
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// ceiling to ensure autowrapping does not cut text
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return Math::ceil(max_line_width);
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}
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int Label::get_line_count() const {
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if (!is_inside_tree()) {
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return 1;
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}
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if (word_cache_dirty) {
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const_cast<Label *>(this)->regenerate_word_cache();
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}
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return line_count;
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}
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int Label::get_visible_line_count() const {
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int line_spacing = get_constant("line_spacing");
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int font_h = get_font("font")->get_height() + line_spacing;
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int lines_visible = (get_size().height - get_stylebox("normal")->get_minimum_size().height + line_spacing) / font_h;
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if (lines_visible > line_count) {
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lines_visible = line_count;
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}
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if (max_lines_visible >= 0 && lines_visible > max_lines_visible) {
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lines_visible = max_lines_visible;
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}
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return lines_visible;
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}
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void Label::regenerate_word_cache() {
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while (word_cache) {
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WordCache *current = word_cache;
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word_cache = current->next;
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memdelete(current);
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}
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int width;
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if (autowrap) {
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Ref<StyleBox> style = get_stylebox("normal");
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width = MAX(get_size().width, get_custom_minimum_size().width) - style->get_minimum_size().width;
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} else {
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width = get_longest_line_width();
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}
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Ref<Font> font = get_font("font");
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real_t current_word_size = 0;
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int word_pos = 0;
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real_t line_width = 0;
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int space_count = 0;
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real_t space_width = font->get_char_size(' ').width;
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int line_spacing = get_constant("line_spacing");
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line_count = 1;
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total_char_cache = 0;
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WordCache *last = nullptr;
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for (int i = 0; i <= xl_text.length(); i++) {
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CharType current = i < xl_text.length() ? xl_text[i] : L' '; //always a space at the end, so the algo works
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if (uppercase) {
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current = String::char_uppercase(current);
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}
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// ranges taken from https://en.wikipedia.org/wiki/Plane_(Unicode)
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// if your language is not well supported, consider helping improve
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// the unicode support in Godot.
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bool separatable = (current >= 0x2E08 && current <= 0x9FFF) || // CJK scripts and symbols.
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(current >= 0xAC00 && current <= 0xD7FF) || // Hangul Syllables and Hangul Jamo Extended-B.
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(current >= 0xF900 && current <= 0xFAFF) || // CJK Compatibility Ideographs.
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(current >= 0xFE30 && current <= 0xFE4F) || // CJK Compatibility Forms.
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(current >= 0xFF65 && current <= 0xFF9F) || // Halfwidth forms of katakana
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(current >= 0xFFA0 && current <= 0xFFDC) || // Halfwidth forms of compatibility jamo characters for Hangul
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(current >= 0x20000 && current <= 0x2FA1F) || // CJK Unified Ideographs Extension B ~ F and CJK Compatibility Ideographs Supplement.
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(current >= 0x30000 && current <= 0x3134F); // CJK Unified Ideographs Extension G.
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bool insert_newline = false;
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real_t char_width = 0;
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if (current < 33) {
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if (current_word_size > 0) {
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WordCache *wc = memnew(WordCache);
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if (word_cache) {
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last->next = wc;
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} else {
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word_cache = wc;
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}
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last = wc;
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wc->pixel_width = current_word_size;
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wc->char_pos = word_pos;
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wc->word_len = i - word_pos;
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wc->space_count = space_count;
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current_word_size = 0;
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space_count = 0;
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} else if ((i == xl_text.length() || current == '\n') && last != nullptr && space_count != 0) {
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//in case there are trailing white spaces we add a placeholder word cache with just the spaces
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WordCache *wc = memnew(WordCache);
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if (word_cache) {
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last->next = wc;
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} else {
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word_cache = wc;
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}
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last = wc;
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wc->pixel_width = 0;
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wc->char_pos = 0;
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wc->word_len = 0;
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wc->space_count = space_count;
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current_word_size = 0;
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space_count = 0;
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}
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if (current == '\n') {
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insert_newline = true;
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} else if (current != ' ') {
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total_char_cache++;
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}
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if (i < xl_text.length() && xl_text[i] == ' ') {
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if (line_width > 0 || last == nullptr || last->char_pos != WordCache::CHAR_WRAPLINE) {
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space_count++;
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line_width += space_width;
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} else {
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space_count = 0;
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}
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}
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} else {
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// latin characters
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if (current_word_size == 0) {
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word_pos = i;
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}
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char_width = font->get_char_size(current, xl_text[i + 1]).width;
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current_word_size += char_width;
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line_width += char_width;
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total_char_cache++;
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// allow autowrap to cut words when they exceed line width
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if (autowrap && (current_word_size > width)) {
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separatable = true;
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}
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}
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if ((autowrap && (line_width >= width) && ((last && last->char_pos >= 0) || separatable)) || insert_newline) {
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if (separatable) {
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if (current_word_size > 0) {
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WordCache *wc = memnew(WordCache);
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if (word_cache) {
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last->next = wc;
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} else {
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word_cache = wc;
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}
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last = wc;
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wc->pixel_width = current_word_size - char_width;
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wc->char_pos = word_pos;
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wc->word_len = i - word_pos;
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wc->space_count = space_count;
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current_word_size = char_width;
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word_pos = i;
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}
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}
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WordCache *wc = memnew(WordCache);
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if (word_cache) {
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last->next = wc;
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} else {
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word_cache = wc;
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}
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last = wc;
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wc->pixel_width = 0;
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wc->char_pos = insert_newline ? WordCache::CHAR_NEWLINE : WordCache::CHAR_WRAPLINE;
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line_width = current_word_size;
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line_count++;
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space_count = 0;
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}
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}
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if (!autowrap) {
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minsize.width = width;
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}
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if (max_lines_visible > 0 && line_count > max_lines_visible) {
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minsize.height = (font->get_height() * max_lines_visible) + (line_spacing * (max_lines_visible - 1));
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} else {
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minsize.height = (font->get_height() * line_count) + (line_spacing * (line_count - 1));
|
|
}
|
|
|
|
if (!autowrap || !clip) {
|
|
//helps speed up some labels that may change a lot, as no resizing is requested. Do not change.
|
|
minimum_size_changed();
|
|
}
|
|
word_cache_dirty = false;
|
|
}
|
|
|
|
void Label::set_align(Align p_align) {
|
|
ERR_FAIL_INDEX((int)p_align, 4);
|
|
align = p_align;
|
|
update();
|
|
}
|
|
|
|
Label::Align Label::get_align() const {
|
|
return align;
|
|
}
|
|
|
|
void Label::set_valign(VAlign p_align) {
|
|
ERR_FAIL_INDEX((int)p_align, 4);
|
|
valign = p_align;
|
|
update();
|
|
}
|
|
|
|
Label::VAlign Label::get_valign() const {
|
|
return valign;
|
|
}
|
|
|
|
void Label::set_text(const String &p_string) {
|
|
if (text == p_string) {
|
|
return;
|
|
}
|
|
text = p_string;
|
|
xl_text = tr(p_string);
|
|
word_cache_dirty = true;
|
|
if (percent_visible < 1) {
|
|
visible_chars = get_total_character_count() * percent_visible;
|
|
}
|
|
update();
|
|
}
|
|
|
|
void Label::set_clip_text(bool p_clip) {
|
|
clip = p_clip;
|
|
update();
|
|
minimum_size_changed();
|
|
}
|
|
|
|
bool Label::is_clipping_text() const {
|
|
return clip;
|
|
}
|
|
|
|
String Label::get_text() const {
|
|
return text;
|
|
}
|
|
|
|
void Label::set_visible_characters(int p_amount) {
|
|
visible_chars = p_amount;
|
|
if (get_total_character_count() > 0) {
|
|
percent_visible = (float)p_amount / (float)total_char_cache;
|
|
}
|
|
_change_notify("percent_visible");
|
|
update();
|
|
}
|
|
|
|
int Label::get_visible_characters() const {
|
|
return visible_chars;
|
|
}
|
|
|
|
void Label::set_percent_visible(float p_percent) {
|
|
if (p_percent < 0 || p_percent >= 1) {
|
|
visible_chars = -1;
|
|
percent_visible = 1;
|
|
|
|
} else {
|
|
visible_chars = get_total_character_count() * p_percent;
|
|
percent_visible = p_percent;
|
|
}
|
|
_change_notify("visible_chars");
|
|
update();
|
|
}
|
|
|
|
float Label::get_percent_visible() const {
|
|
return percent_visible;
|
|
}
|
|
|
|
void Label::set_lines_skipped(int p_lines) {
|
|
ERR_FAIL_COND(p_lines < 0);
|
|
lines_skipped = p_lines;
|
|
update();
|
|
}
|
|
|
|
int Label::get_lines_skipped() const {
|
|
return lines_skipped;
|
|
}
|
|
|
|
void Label::set_max_lines_visible(int p_lines) {
|
|
max_lines_visible = p_lines;
|
|
update();
|
|
}
|
|
|
|
int Label::get_max_lines_visible() const {
|
|
return max_lines_visible;
|
|
}
|
|
|
|
int Label::get_total_character_count() const {
|
|
if (word_cache_dirty) {
|
|
const_cast<Label *>(this)->regenerate_word_cache();
|
|
}
|
|
|
|
return total_char_cache;
|
|
}
|
|
|
|
void Label::_bind_methods() {
|
|
ClassDB::bind_method(D_METHOD("set_align", "align"), &Label::set_align);
|
|
ClassDB::bind_method(D_METHOD("get_align"), &Label::get_align);
|
|
ClassDB::bind_method(D_METHOD("set_valign", "valign"), &Label::set_valign);
|
|
ClassDB::bind_method(D_METHOD("get_valign"), &Label::get_valign);
|
|
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_autowrap", "enable"), &Label::set_autowrap);
|
|
ClassDB::bind_method(D_METHOD("has_autowrap"), &Label::has_autowrap);
|
|
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_uppercase", "enable"), &Label::set_uppercase);
|
|
ClassDB::bind_method(D_METHOD("is_uppercase"), &Label::is_uppercase);
|
|
ClassDB::bind_method(D_METHOD("get_line_height"), &Label::get_line_height);
|
|
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("set_percent_visible", "percent_visible"), &Label::set_percent_visible);
|
|
ClassDB::bind_method(D_METHOD("get_percent_visible"), &Label::get_percent_visible);
|
|
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);
|
|
|
|
BIND_ENUM_CONSTANT(ALIGN_LEFT);
|
|
BIND_ENUM_CONSTANT(ALIGN_CENTER);
|
|
BIND_ENUM_CONSTANT(ALIGN_RIGHT);
|
|
BIND_ENUM_CONSTANT(ALIGN_FILL);
|
|
|
|
BIND_ENUM_CONSTANT(VALIGN_TOP);
|
|
BIND_ENUM_CONSTANT(VALIGN_CENTER);
|
|
BIND_ENUM_CONSTANT(VALIGN_BOTTOM);
|
|
BIND_ENUM_CONSTANT(VALIGN_FILL);
|
|
|
|
ADD_PROPERTY(PropertyInfo(Variant::STRING, "text", PROPERTY_HINT_MULTILINE_TEXT, "", PROPERTY_USAGE_DEFAULT_INTL), "set_text", "get_text");
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT, "align", PROPERTY_HINT_ENUM, "Left,Center,Right,Fill"), "set_align", "get_align");
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT, "valign", PROPERTY_HINT_ENUM, "Top,Center,Bottom,Fill"), "set_valign", "get_valign");
|
|
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "autowrap"), "set_autowrap", "has_autowrap");
|
|
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "clip_text"), "set_clip_text", "is_clipping_text");
|
|
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "uppercase"), "set_uppercase", "is_uppercase");
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT, "visible_characters", PROPERTY_HINT_RANGE, "-1,128000,1", PROPERTY_USAGE_EDITOR), "set_visible_characters", "get_visible_characters");
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL, "percent_visible", PROPERTY_HINT_RANGE, "0,1,0.001"), "set_percent_visible", "get_percent_visible");
|
|
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");
|
|
}
|
|
|
|
Label::Label(const String &p_text) {
|
|
align = ALIGN_LEFT;
|
|
valign = VALIGN_TOP;
|
|
xl_text = "";
|
|
word_cache = nullptr;
|
|
word_cache_dirty = true;
|
|
autowrap = false;
|
|
line_count = 0;
|
|
set_v_size_flags(0);
|
|
clip = false;
|
|
set_mouse_filter(MOUSE_FILTER_IGNORE);
|
|
total_char_cache = 0;
|
|
visible_chars = -1;
|
|
percent_visible = 1;
|
|
lines_skipped = 0;
|
|
max_lines_visible = -1;
|
|
set_text(p_text);
|
|
uppercase = false;
|
|
set_v_size_flags(SIZE_SHRINK_CENTER);
|
|
}
|
|
|
|
Label::~Label() {
|
|
while (word_cache) {
|
|
WordCache *current = word_cache;
|
|
word_cache = current->next;
|
|
memdelete(current);
|
|
}
|
|
}
|