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LibGUI: Convert mouse events from a visual to a physical position

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When clicking a position within a TextEditor, we should interpret that
position as a visual location. That location should be converted to a
"physical" location before using it to set the physical cursor position.

For example, consider a document with 2 emoji, each consisting of 3 code
points. Visually, these will occupy 2 columns. When a mouse click occurs
between these columns, we need to convert the visual column number 1 to
the physical column number 3 when storing the new cursor location.
This commit is contained in:
Timothy Flynn 2023-02-20 12:31:48 -05:00 • committed by Andreas Kling
parent b823f3d29f
commit 2eb2207f50
2 changed files with 24 additions and 3 deletions
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Userland/Libraries/LibGUI/TextEditor.h
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@ -190,6 +190,7 @@ public:
void set_cursor_and_focus_line(size_t line, size_t column);
void set_cursor(size_t line, size_t column);
virtual void set_cursor(TextPosition const&);
void set_cursor_to_text_position(Gfx::IntPoint);
Syntax::Highlighter* syntax_highlighter();
Syntax::Highlighter const* syntax_highlighter() const;