Method TakeSnapshot

GUI/RichTextarea.cpp:359–416

		}
	}
	void	TakeSnapshot(AreaLine *start, ChangeFlag changeFlag, unsigned int linesAffected, bool redo = false, bool clearRedo = true)
	{
		Snapshot *&lastShot = redo ? lastShotR : lastShotU;
		AddSnapshotToList(redo);
		// If snapshot is taken for undo, remove all redo snapshots (unless undo is made during redo)
		if(clearRedo)
		{
			while(firstShotR)
			{
				Snapshot *next = firstShotR->nextShot;
				delete firstShotR;
				firstShotR = next;
			}
			firstShotR = lastShotR = NULL;
		}
		lastShot->dirty = true;
		// Type of edit and lines affected by it
		lastShot->type = changeFlag;
		lastShot->lines = linesAffected;
		// Save cursor position
		lastShot->cursorX = data->cursorCharX;
		lastShot->cursorY = data->cursorCharY;
		// Save selection state
		lastShot->selectStartX = data->dragStartX;
		lastShot->selectStartY = data->dragStartY;
		lastShot->selectEndX = data->dragEndX;
		lastShot->selectEndY = data->dragEndY;
		lastShot->selectionOn = data->selectionOn;

		lastShot->first = NULL;
		// Find the number of a line, where edit starts
		lastShot->startLine = 0;
		AreaLine *src = data->firstLine;
		while(src != start)
		{
			src = src->next;
			lastShot->startLine++;
		}
		// Copy affected lines to snapshot line list.
		// (unless the edit creates a number of new lines, in which case we have to save only one)
		AreaLine *curr = NULL;
		for(unsigned int i = 0; i < (changeFlag == LINES_ADDED ? 1 : linesAffected); i++)
		{
			// Copy line
			curr = InsertLineAfter(curr);
			ExtendLine(curr, src->length);
			memcpy(curr->data, src->data, src->length * sizeof(AreaChar));
			curr->length = src->length;
			curr->lineStyle = src->lineStyle;
			curr->lineExtra = src->lineExtra;
			
			// Set the first line, if not set
			if(!lastShot->first)
				lastShot->first = curr;
			// Move to the next
			src = src->next;
		}
	}