Differential D13303 Diff 45934 source/blender/editors/interface/interface_undo.c

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source/blender/editors/interface/interface_undo.c

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	{			{
	BLI_assert(ELEM(direction, -1, 1));			BLI_assert(ELEM(direction, -1, 1));
	if (direction < 0) {			if (direction < 0) {
	return ui_textedit_undo_impl(stack, r_cursor_index);			return ui_textedit_undo_impl(stack, r_cursor_index);
	}			}
	return ui_textedit_redo_impl(stack, r_cursor_index);			return ui_textedit_redo_impl(stack, r_cursor_index);
	}			}

	/**
	* Push the information in the arguments to a new state in the undo stack.
	*
	* \note Currently the total length of the undo stack is not limited.
	*/
	void ui_textedit_undo_push(uiUndoStack_Text stack, const char text, int cursor_index)			void ui_textedit_undo_push(uiUndoStack_Text stack, const char text, int cursor_index)
	{			{
	/* Clear all redo actions from the current state. */			/* Clear all redo actions from the current state. */
	if (stack->current != NULL) {			if (stack->current != NULL) {
	while (stack->current->next) {			while (stack->current->next) {
	uiUndoStack_Text_State *state = stack->current->next;			uiUndoStack_Text_State *state = stack->current->next;
	BLI_remlink(&stack->states, state);			BLI_remlink(&stack->states, state);
	MEM_freeN(state);			MEM_freeN(state);
	}			}
	}			}

	/* Create the new state. */			/* Create the new state. */
	const int text_size = strlen(text) + 1;			const int text_size = strlen(text) + 1;
	stack->current = MEM_mallocN(sizeof(uiUndoStack_Text_State) + text_size, __func__);			stack->current = MEM_mallocN(sizeof(uiUndoStack_Text_State) + text_size, __func__);
	stack->current->cursor_index = cursor_index;			stack->current->cursor_index = cursor_index;
	memcpy(stack->current->text, text, text_size);			memcpy(stack->current->text, text, text_size);
	BLI_addtail(&stack->states, stack->current);			BLI_addtail(&stack->states, stack->current);
	}			}
	/**
	* Start the undo stack.
	*
	* \note The current state should be pushed immediately after calling this.
	*/
	uiUndoStack_Text *ui_textedit_undo_stack_create(void)			uiUndoStack_Text *ui_textedit_undo_stack_create(void)
	{			{
	uiUndoStack_Text *stack = MEM_mallocN(sizeof(uiUndoStack_Text), __func__);			uiUndoStack_Text *stack = MEM_mallocN(sizeof(uiUndoStack_Text), __func__);
	stack->current = NULL;			stack->current = NULL;
	BLI_listbase_clear(&stack->states);			BLI_listbase_clear(&stack->states);

	return stack;			return stack;
	}			}

	void ui_textedit_undo_stack_destroy(uiUndoStack_Text *stack)			void ui_textedit_undo_stack_destroy(uiUndoStack_Text *stack)
	{			{
	BLI_freelistN(&stack->states);			BLI_freelistN(&stack->states);
	MEM_freeN(stack);			MEM_freeN(stack);
	}			}

	/** \} */			/** \} */