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GTextEditor: Add GTextEditor::on_change callback for when content changes.

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This commit is contained in:
Andreas Kling 2019-04-09 16:20:36 +02:00
parent 60a819c14a
commit 151b7149e6
2 changed files with 24 additions and 6 deletions
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27
LibGUI/GTextEditor.cpp
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@ -33,6 +33,7 @@ void GTextEditor::set_text(const String& text)
if (is_single_line() && text.length() == m_lines[0]->length() && !memcmp(text.characters(), m_lines[0]->characters(), text.length()))
return;
m_selection.clear();
m_lines.clear();
int start_of_current_line = 0;
@ -414,8 +415,8 @@ void GTextEditor::do_delete()
if (m_cursor.column() < current_line().length()) {
// Delete within line
current_line().remove(m_cursor.column());
update_content_size();
update_cursor();
did_change();
return;
}
if (m_cursor.column() == current_line().length() && m_cursor.line() != line_count() - 1) {
@ -424,9 +425,9 @@ void GTextEditor::do_delete()
int previous_length = current_line().length();
current_line().append(next_line.characters(), next_line.length());
m_lines.remove(m_cursor.line() + 1);
update_content_size();
update();
set_cursor(m_cursor.line(), previous_length);
did_change();
return;
}
}
@ -451,18 +452,18 @@ void GTextEditor::insert_at_cursor(char ch)
}
if (at_tail || at_head) {
m_lines.insert(m_cursor.line() + (at_tail ? 1 : 0), make<Line>());
update_content_size();
update();
set_cursor(m_cursor.line() + 1, 0);
did_change();
return;
}
auto new_line = make<Line>();
new_line->append(current_line().characters() + m_cursor.column(), current_line().length() - m_cursor.column());
current_line().truncate(m_cursor.column());
m_lines.insert(m_cursor.line() + 1, move(new_line));
update_content_size();
update();
set_cursor(m_cursor.line() + 1, 0);
did_change();
return;
}
if (ch == '\t') {
@ -471,15 +472,15 @@ void GTextEditor::insert_at_cursor(char ch)
for (int i = 0; i < spaces_to_insert; ++i) {
current_line().insert(m_cursor.column(), ' ');
}
update_content_size();
set_cursor(m_cursor.line(), next_soft_tab_stop);
update_cursor();
did_change();
return;
}
current_line().insert(m_cursor.column(), ch);
update_content_size();
set_cursor(m_cursor.line(), m_cursor.column() + 1);
update_cursor();
did_change();
}
Rect GTextEditor::cursor_content_rect() const
@ -772,6 +773,7 @@ void GTextEditor::delete_selection()
m_selection.clear();
set_cursor(selection.start());
update();
did_change();
}
void GTextEditor::insert_at_cursor_or_replace_selection(const String& text)
@ -814,3 +816,16 @@ void GTextEditor::leave_event(GEvent&)
ASSERT(window());
window()->set_override_cursor(GStandardCursor::None);
}
void GTextEditor::did_change()
{
update_content_size();
if (!m_have_pending_change_notification) {
m_have_pending_change_notification = true;
deferred_invoke([this] (auto&) {
if (on_change)
on_change();
m_have_pending_change_notification = false;
});
}
}

3
LibGUI/GTextEditor.h
View file

@ -96,6 +96,7 @@ public:
void do_delete();
void delete_current_line();
Function<void()> on_change;
Function<void(GTextEditor&)> on_return_pressed;
Function<void(GTextEditor&)> on_escape_pressed;
@ -116,6 +117,7 @@ private:
void paint_ruler(Painter&);
void update_content_size();
void did_change();
class Line {
friend class GTextEditor;
@ -163,6 +165,7 @@ private:
bool m_cursor_state { true };
bool m_in_drag_select { false };
bool m_ruler_visible { true };
bool m_have_pending_change_notification { false };
int m_line_spacing { 4 };
int m_soft_tab_width { 4 };
int m_horizontal_content_padding { 2 };