com.itextpdf.layout.renderer.RootRendererAreaStateHandler Maven / Gradle / Ivy
/*
This file is part of the iText (R) project.
Copyright (c) 1998-2023 iText Group NV
Authors: iText Software.
This program is offered under a commercial and under the AGPL license.
For commercial licensing, contact us at https://itextpdf.com/sales. For AGPL licensing, see below.
AGPL licensing:
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see .
*/
package com.itextpdf.layout.renderer;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.layout.layout.RootLayoutArea;
import java.util.ArrayList;
import java.util.List;
class RootRendererAreaStateHandler {
private RootLayoutArea storedPreviousArea;
private RootLayoutArea storedNextArea;
private List storedPreviousFloatRenderAreas = null;
private List storedNextFloatRenderAreas = null;
public boolean attemptGoBackToStoredPreviousStateAndStoreNextState(RootRenderer rootRenderer) {
boolean result = false;
if (storedPreviousArea != null) {
storedNextArea = rootRenderer.currentArea;
rootRenderer.currentArea = storedPreviousArea;
storedNextFloatRenderAreas = new ArrayList<>(rootRenderer.floatRendererAreas);
rootRenderer.floatRendererAreas = storedPreviousFloatRenderAreas;
storedPreviousFloatRenderAreas = null;
storedPreviousArea = null;
result = true;
}
return result;
}
public boolean attemptGoForwardToStoredNextState(RootRenderer rootRenderer) {
if (storedNextArea != null) {
rootRenderer.currentArea = storedNextArea;
rootRenderer.floatRendererAreas = storedNextFloatRenderAreas;
storedNextArea = null;
storedNextFloatRenderAreas = null;
return true;
} else {
return false;
}
}
public RootRendererAreaStateHandler storePreviousState(RootRenderer rootRenderer) {
storedPreviousArea = rootRenderer.currentArea;
storedPreviousFloatRenderAreas = new ArrayList<>(rootRenderer.floatRendererAreas);
return this;
}
}