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// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "xfa/fde/fde_iterator.h"
#include "xfa/fgas/crt/fgas_utils.h"
IFDE_VisualSetIterator* IFDE_VisualSetIterator::Create() {
return new CFDE_VisualSetIterator;
}
CFDE_VisualSetIterator::CFDE_VisualSetIterator() : m_dwFilter(0) {}
CFDE_VisualSetIterator::~CFDE_VisualSetIterator() {
m_CanvasStack.RemoveAll();
}
FX_BOOL CFDE_VisualSetIterator::AttachCanvas(IFDE_CanvasSet* pCanvas) {
FXSYS_assert(pCanvas != NULL);
m_CanvasStack.RemoveAll();
FDE_CANVASITEM canvas;
canvas.hCanvas = NULL;
canvas.pCanvas = pCanvas;
canvas.hPos = pCanvas->GetFirstPosition(NULL);
if (canvas.hPos == NULL) {
return FALSE;
}
return m_CanvasStack.Push(canvas) == 0;
}
FX_BOOL CFDE_VisualSetIterator::FilterObjects(uint32_t dwObjects) {
if (m_CanvasStack.GetSize() == 0)
return FALSE;
while (m_CanvasStack.GetSize() > 1)
m_CanvasStack.Pop();
m_dwFilter = dwObjects;
FDE_CANVASITEM* pCanvas = m_CanvasStack.GetTopElement();
FXSYS_assert(pCanvas != NULL && pCanvas->pCanvas != NULL);
pCanvas->hPos = pCanvas->pCanvas->GetFirstPosition(NULL);
return pCanvas->hPos != NULL;
}
void CFDE_VisualSetIterator::Reset() {
FilterObjects(m_dwFilter);
}
FDE_HVISUALOBJ CFDE_VisualSetIterator::GetNext(IFDE_VisualSet*& pVisualSet,
FDE_HVISUALOBJ* phCanvasObj,
IFDE_CanvasSet** ppCanvasSet) {
while (m_CanvasStack.GetSize() > 0) {
FDE_CANVASITEM* pCanvas = m_CanvasStack.GetTopElement();
FXSYS_assert(pCanvas != NULL && pCanvas->pCanvas != NULL);
if (pCanvas->hPos == NULL) {
if (m_CanvasStack.GetSize() == 1) {
break;
}
m_CanvasStack.Pop();
continue;
}
do {
FDE_HVISUALOBJ hObj = pCanvas->pCanvas->GetNext(
pCanvas->hCanvas, pCanvas->hPos, pVisualSet);
FXSYS_assert(hObj != NULL);
FDE_VISUALOBJTYPE eType = pVisualSet->GetType();
if (eType == FDE_VISUALOBJ_Canvas) {
FDE_CANVASITEM canvas;
canvas.hCanvas = hObj;
canvas.pCanvas = (IFDE_CanvasSet*)pVisualSet;
canvas.hPos = canvas.pCanvas->GetFirstPosition(hObj);
m_CanvasStack.Push(canvas);
break;
}
uint32_t dwObj = (uint32_t)eType;
if ((m_dwFilter & dwObj) != 0) {
if (ppCanvasSet) {
*ppCanvasSet = pCanvas->pCanvas;
}
if (phCanvasObj) {
*phCanvasObj = pCanvas->hCanvas;
}
return hObj;
}
} while (pCanvas->hPos != NULL);
}
if (ppCanvasSet) {
*ppCanvasSet = NULL;
}
if (phCanvasObj) {
*phCanvasObj = NULL;
}
pVisualSet = NULL;
return NULL;
}
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