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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/fde/cfde_txtedtpage.h"
CFDE_VisualSetIterator::CFDE_VisualSetIterator() : m_dwFilter(0) {}
CFDE_VisualSetIterator::~CFDE_VisualSetIterator() {}
bool CFDE_VisualSetIterator::AttachCanvas(CFDE_TxtEdtPage* pCanvas) {
ASSERT(pCanvas);
m_CanvasStack = std::stack<FDE_CANVASITEM>();
FDE_CANVASITEM canvas;
canvas.hCanvas = nullptr;
canvas.pCanvas = pCanvas;
canvas.pos = pCanvas->GetFirstPosition();
if (canvas.pos == 0)
return false;
m_CanvasStack.push(canvas);
return true;
}
bool CFDE_VisualSetIterator::FilterObjects(uint32_t dwObjects) {
if (m_CanvasStack.empty())
return false;
while (m_CanvasStack.size() > 1)
m_CanvasStack.pop();
m_dwFilter = dwObjects;
FDE_CANVASITEM* pCanvas = &m_CanvasStack.top();
ASSERT(pCanvas && pCanvas->pCanvas);
pCanvas->pos = pCanvas->pCanvas->GetFirstPosition();
return pCanvas->pos != 0;
}
void CFDE_VisualSetIterator::Reset() {
FilterObjects(m_dwFilter);
}
FDE_TEXTEDITPIECE* CFDE_VisualSetIterator::GetNext(
IFDE_VisualSet*& pVisualSet,
FDE_TEXTEDITPIECE** phCanvasObj,
CFDE_TxtEdtPage** ppCanvasSet) {
while (!m_CanvasStack.empty()) {
FDE_CANVASITEM* pCanvas = &m_CanvasStack.top();
if (pCanvas->pos == 0) {
if (m_CanvasStack.size() == 1)
break;
m_CanvasStack.pop();
continue;
}
do {
FDE_TEXTEDITPIECE* pObj =
pCanvas->pCanvas->GetNext(&pCanvas->pos, pVisualSet);
ASSERT(pObj);
FDE_VISUALOBJTYPE eType = pVisualSet->GetType();
if (eType == FDE_VISUALOBJ_Canvas) {
FDE_CANVASITEM canvas;
canvas.hCanvas = pObj;
canvas.pCanvas = static_cast<CFDE_TxtEdtPage*>(pVisualSet);
canvas.pos = canvas.pCanvas->GetFirstPosition();
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 pObj;
}
} while (pCanvas->pos != 0);
}
if (ppCanvasSet)
*ppCanvasSet = nullptr;
if (phCanvasObj)
*phCanvasObj = nullptr;
pVisualSet = nullptr;
return nullptr;
}
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