using Gdk; using Gee; using Gtk; using Dino.Entities; namespace Dino.Ui.ChatInput { public class EditHistory { private Conversation? conversation; private TextView text_input; private HashMap> histories = new HashMap>(Conversation.hash_func, Conversation.equals_func); private HashMap indices = new HashMap(Conversation.hash_func, Conversation.equals_func); public EditHistory(TextView text_input, GLib.Application application) { this.text_input = text_input; text_input.key_press_event.connect(on_text_input_key_press); text_input.cut_clipboard.connect_after(save_state); text_input.paste_clipboard.connect_after(save_state); text_input.move_cursor.connect_after(save_state); text_input.button_release_event.connect_after(() => { save_state(); return false; }); } public void initialize_for_conversation(Conversation conversation) { this.conversation = conversation; if (!histories.has_key(conversation)) { reset_history(); } } public bool on_text_input_key_press(EventKey event) { bool ctrl_pressed = (event.state & ModifierType.CONTROL_MASK) > 0; if (ctrl_pressed && event.keyval == Key.z) { undo(); } else if (ctrl_pressed && (event.keyval in new uint[]{ Key.Z, Key.y } )) { redo(); } else if (event.keyval in new uint[]{ Key.space, Key.Tab, Key.ISO_Left_Tab }) { save_state(); } return false; } private void undo() { save_state(); if (indices[conversation] > 0) { indices[conversation] = indices[conversation] - 1; text_input.buffer.text = histories[conversation][indices[conversation]]; } } private void redo() { if (indices[conversation] < histories[conversation].size - 1) { indices[conversation] = indices[conversation] + 1; text_input.buffer.text = histories[conversation][indices[conversation]]; } } private void save_state() { if (histories[conversation][indices[conversation]] == text_input.buffer.text) return; if (indices[conversation] < histories[conversation].size - 1) { histories[conversation] = histories[conversation].slice(0, indices[conversation] + 1); } histories[conversation].add(text_input.buffer.text); indices[conversation] = indices[conversation] + 1; } public void reset_history() { histories[conversation] = new ArrayList(); histories[conversation].add(""); indices[conversation] = 0; } } }