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Code Issues Activity Actions

TextEditor: Added undo functionality

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Created a stack where a vector of undo actions are stored.
This commit is contained in:
rhin123 2019-11-02 14:22:49 -05:00 • committed by Andreas Kling
parent a221cddeec
commit 9e608885d1
2 changed files with 277 additions and 7 deletions
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65
Libraries/LibGUI/GTextEditor.h
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@ -79,6 +79,8 @@ public:
void do_delete();
void delete_current_line();
void select_all();
void undo();
void redo();
Function<void()> on_change;
Function<void()> on_return_pressed;
@ -137,6 +139,7 @@ private:
Rect cursor_content_rect() const;
Rect content_rect_for_position(const GTextPosition&) const;
void update_cursor();
void update_undo_timer();
const NonnullOwnPtrVector<GTextDocumentLine>& lines() const { return document().lines(); }
NonnullOwnPtrVector<GTextDocumentLine>& lines() { return document().lines(); }
GTextDocumentLine& line(int index) { return document().line(index); }
@ -156,6 +159,64 @@ private:
Rect visible_text_rect_in_inner_coordinates() const;
void recompute_all_visual_lines();
class UndoCommand {
public:
UndoCommand(GTextEditor& text_editor);
virtual ~UndoCommand();
virtual void undo();
virtual void redo();
protected:
GTextEditor& m_text_editor;
};
class InsertCharacterCommand : public UndoCommand {
public:
InsertCharacterCommand(GTextEditor& text_editor, char ch, GTextPosition text_position);
virtual void undo() override;
virtual void redo() override;
private:
char m_character;
GTextPosition m_text_position;
};
class RemoveCharacterCommand : public UndoCommand {
public:
RemoveCharacterCommand(GTextEditor& text_editor, char ch, GTextPosition text_position);
virtual void undo() override;
virtual void redo() override;
private:
char m_character;
GTextPosition m_text_position;
};
class RemoveLineCommand : public UndoCommand {
public:
RemoveLineCommand(GTextEditor& text_editor, String, GTextPosition text_position, bool has_merged_content);
virtual void undo() override;
virtual void redo() override;
private:
String m_line_content;
GTextPosition m_text_position;
bool m_has_merged_content;
};
class CreateLineCommand : public UndoCommand {
public:
CreateLineCommand(GTextEditor& text_editor, Vector<char> line_content, GTextPosition text_position);
virtual void undo() override;
virtual void redo() override;
private:
Vector<char> m_line_content;
GTextPosition m_text_position;
};
void add_to_undo_stack(NonnullOwnPtr<UndoCommand> undo_command);
int visual_line_containing(int line_index, int column) const;
void recompute_visual_lines(int line_index);
@ -183,6 +244,10 @@ private:
RefPtr<GAction> m_delete_action;
CElapsedTimer m_triple_click_timer;
NonnullRefPtrVector<GAction> m_custom_context_menu_actions;
NonnullOwnPtrVector<NonnullOwnPtrVector<UndoCommand>> m_undo_stack;
int m_undo_index = 0;
int m_undo_timer = 0;
int m_prev_undo_stack_size = 0;
RefPtr<GTextDocument> m_document;