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Add two methods to compute the height and width of an individual line in a RichTextLabel

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ExEago 2025-04-17 20:04:43 +02:00
parent 09ea7bc6a3
commit 4115b813fe
3 changed files with 57 additions and 0 deletions
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16
doc/classes/RichTextLabel.xml
View file

@ -106,6 +106,14 @@
[b]Note:[/b] If [member threaded] is enabled, this method returns a value for the loaded part of the document. Use [method is_finished] or [signal finished] to determine whether document is fully loaded.
</description>
</method>
<method name="get_line_height" qualifiers="const">
<return type="int" />
<param index="0" name="line" type="int" />
<description>
Returns the height of the line found at the provided index.
[b]Note:[/b] If [member threaded] is enabled, this method returns a value for the loaded part of the document. Use [method is_finished] or [signal finished] to determine whether the document is fully loaded.
</description>
</method>
<method name="get_line_offset">
<return type="float" />
<param index="0" name="line" type="int" />
@ -123,6 +131,14 @@
[b]Note:[/b] If [member threaded] is enabled, this method returns a value for the loaded part of the document. Use [method is_finished] or [signal finished] to determine whether document is fully loaded.
</description>
</method>
<method name="get_line_width" qualifiers="const">
<return type="int" />
<param index="0" name="line" type="int" />
<description>
Returns the width of the line found at the provided index.
[b]Note:[/b] If [member threaded] is enabled, this method returns a value for the loaded part of the document. Use [method is_finished] or [signal finished] to determine whether the document is fully loaded.
</description>
</method>
<method name="get_menu" qualifiers="const">
<return type="PopupMenu" />
<description>

38
scene/gui/rich_text_label.cpp
View file

@ -7085,6 +7085,41 @@ int RichTextLabel::get_content_width() const {
return total_width;
}
int RichTextLabel::get_line_height(int p_line) const {
const_cast<RichTextLabel *>(this)->_validate_line_caches();
int line_count = 0;
int to_line = main->first_invalid_line.load();
for (int i = 0; i < to_line; i++) {
MutexLock lock(main->lines[i].text_buf->get_mutex());
int lc = main->lines[i].text_buf->get_line_count();
if (p_line < line_count + lc) {
const Ref<TextParagraph> text_buf = main->lines[i].text_buf;
return text_buf->get_line_ascent(p_line - line_count) + text_buf->get_line_descent(p_line - line_count) + theme_cache.line_separation;
}
line_count += lc;
}
return 0;
}
int RichTextLabel::get_line_width(int p_line) const {
const_cast<RichTextLabel *>(this)->_validate_line_caches();
int line_count = 0;
int to_line = main->first_invalid_line.load();
for (int i = 0; i < to_line; i++) {
MutexLock lock(main->lines[i].text_buf->get_mutex());
int lc = main->lines[i].text_buf->get_line_count();
if (p_line < line_count + lc) {
return main->lines[i].text_buf->get_line_width(p_line - line_count);
}
line_count += lc;
}
return 0;
}
#ifndef DISABLE_DEPRECATED
// People will be very angry, if their texts get erased, because of #39148. (3.x -> 4.0)
// Although some people may not used bbcode_text, so we only overwrite, if bbcode_text is not empty.
@ -7256,6 +7291,9 @@ void RichTextLabel::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_content_height"), &RichTextLabel::get_content_height);
ClassDB::bind_method(D_METHOD("get_content_width"), &RichTextLabel::get_content_width);
ClassDB::bind_method(D_METHOD("get_line_height", "line"), &RichTextLabel::get_line_height);
ClassDB::bind_method(D_METHOD("get_line_width", "line"), &RichTextLabel::get_line_width);
ClassDB::bind_method(D_METHOD("get_line_offset", "line"), &RichTextLabel::get_line_offset);
ClassDB::bind_method(D_METHOD("get_paragraph_offset", "paragraph"), &RichTextLabel::get_paragraph_offset);

3
scene/gui/rich_text_label.h
View file

@ -849,6 +849,9 @@ public:
int get_content_height() const;
int get_content_width() const;
int get_line_height(int p_line) const;
int get_line_width(int p_line) const;
void scroll_to_selection();
VScrollBar *get_v_scroll_bar() { return vscroll; }