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Code Issues Projects Releases Packages Wiki Activity Actions 6

GTextEditor: More work on basic line editing. Insert/remove characters.

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This commit is contained in:
Andreas Kling 2019-03-07 16:04:21 +01:00
parent 8425ea971a
commit 6094f592a9
Notes: sideshowbarker 2024-07-19 15:08:28 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/6094f592a90
2 changed files with 47 additions and 0 deletions
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42
LibGUI/GTextEditor.cpp
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@ -186,6 +186,14 @@ void GTextEditor::keydown_event(GKeyEvent& event)
return;
}
if (!event.modifiers() && event.key() == KeyCode::Key_Backspace) {
if (m_cursor.column() > 0) {
current_line().remove(m_cursor.column() - 1);
set_cursor(m_cursor.line(), m_cursor.column() - 1);
}
return;
}
if (!event.text().is_empty())
insert_at_cursor(event.text()[0]);
@ -204,7 +212,11 @@ void GTextEditor::insert_at_cursor(char ch)
update();
return;
}
return;
}
current_line().insert(m_cursor.column(), ch);
set_cursor(m_cursor.line(), m_cursor.column() + 1);
update_cursor();
}
Rect GTextEditor::visible_content_rect() const
@ -330,3 +342,33 @@ int GTextEditor::Line::width(const Font& font) const
{
return font.glyph_width('x') * length();
}
void GTextEditor::Line::append(char ch)
{
insert(length(), ch);
}
void GTextEditor::Line::prepend(char ch)
{
insert(0, ch);
}
void GTextEditor::Line::insert(int index, char ch)
{
if (index == length()) {
m_text.last() = ch;
m_text.append(0);
} else {
m_text.insert(index, move(ch));
}
}
void GTextEditor::Line::remove(int index)
{
if (index == length()) {
m_text.take_last();
m_text.last() = 0;
} else {
m_text.remove(index);
}
}

5
LibGUI/GTextEditor.h
View file

@ -60,6 +60,7 @@ private:
virtual bool accepts_focus() const override { return true; }
class Line {
friend class GTextEditor;
public:
Line();
@ -67,6 +68,10 @@ private:
int length() const { return m_text.size() - 1; }
int width(const Font&) const;
void set_text(const String&);
void append(char);
void prepend(char);
void insert(int index, char);
void remove(int index);
private:
// NOTE: This vector is null terminated.