Cleanup some xfa/fxfa code.

This CL moves the .h files to have names corresponding to the contained
classes. The .cpp files are moved alongside the .h files. Any extra
classes in the .h files have been split into their own files.

Change-Id: I14b4efc02417f0df946500e87b6c502e77020db8
Reviewed-on: https://pdfium-review.googlesource.com/3160
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Nicolás Peña <npm@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

1 files changed, 459 insertions, 0 deletions

diff --git a/xfa/fxfa/cxfa_ffpageview.cpp b/xfa/fxfa/cxfa_ffpageview.cpp
new file mode 100644
index 0000000000..3eda5a1d4a
--- /dev/null
+++ b/xfa/fxfa/cxfa_ffpageview.cpp
@@ -0,0 +1,459 @@
+// 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/fxfa/cxfa_ffpageview.h"
+
+#include <memory>
+#include <vector>
+
+#include "third_party/base/ptr_util.h"
+#include "third_party/base/stl_util.h"
+#include "xfa/fde/fde_render.h"
+#include "xfa/fxfa/app/xfa_ffcheckbutton.h"
+#include "xfa/fxfa/app/xfa_ffchoicelist.h"
+#include "xfa/fxfa/app/xfa_fffield.h"
+#include "xfa/fxfa/app/xfa_ffimageedit.h"
+#include "xfa/fxfa/app/xfa_ffpushbutton.h"
+#include "xfa/fxfa/app/xfa_fftextedit.h"
+#include "xfa/fxfa/app/xfa_fwladapter.h"
+#include "xfa/fxfa/cxfa_ffdoc.h"
+#include "xfa/fxfa/cxfa_ffdocview.h"
+#include "xfa/fxfa/cxfa_ffwidget.h"
+
+namespace {
+
+CFX_Matrix GetPageMatrix(const CFX_RectF& docPageRect,
+                         const CFX_Rect& devicePageRect,
+                         int32_t iRotate,
+                         uint32_t dwCoordinatesType) {
+  ASSERT(iRotate >= 0 && iRotate <= 3);
+
+  bool bFlipX = (dwCoordinatesType & 0x01) != 0;
+  bool bFlipY = (dwCoordinatesType & 0x02) != 0;
+  CFX_Matrix m((bFlipX ? -1.0f : 1.0f), 0, 0, (bFlipY ? -1.0f : 1.0f), 0, 0);
+  if (iRotate == 0 || iRotate == 2) {
+    m.a *= (float)devicePageRect.width / docPageRect.width;
+    m.d *= (float)devicePageRect.height / docPageRect.height;
+  } else {
+    m.a *= (float)devicePageRect.height / docPageRect.width;
+    m.d *= (float)devicePageRect.width / docPageRect.height;
+  }
+  m.Rotate(iRotate * 1.57079632675f);
+  switch (iRotate) {
+    case 0:
+      m.e = bFlipX ? (float)devicePageRect.right() : (float)devicePageRect.left;
+      m.f = bFlipY ? (float)devicePageRect.bottom() : (float)devicePageRect.top;
+      break;
+    case 1:
+      m.e = bFlipY ? (float)devicePageRect.left : (float)devicePageRect.right();
+      m.f = bFlipX ? (float)devicePageRect.bottom() : (float)devicePageRect.top;
+      break;
+    case 2:
+      m.e = bFlipX ? (float)devicePageRect.left : (float)devicePageRect.right();
+      m.f = bFlipY ? (float)devicePageRect.top : (float)devicePageRect.bottom();
+      break;
+    case 3:
+      m.e = bFlipY ? (float)devicePageRect.right() : (float)devicePageRect.left;
+      m.f = bFlipX ? (float)devicePageRect.top : (float)devicePageRect.bottom();
+      break;
+    default:
+      break;
+  }
+  return m;
+}
+
+bool PageWidgetFilter(CXFA_FFWidget* pWidget,
+                      uint32_t dwFilter,
+                      bool bTraversal,
+                      bool bIgnorerelevant) {
+  CXFA_WidgetAcc* pWidgetAcc = pWidget->GetDataAcc();
+
+  if (!!(dwFilter & XFA_WidgetStatus_Focused) &&
+      pWidgetAcc->GetElementType() != XFA_Element::Field) {
+    return false;
+  }
+
+  uint32_t dwStatus = pWidget->GetStatus();
+  if (bTraversal && (dwStatus & XFA_WidgetStatus_Disabled))
+    return false;
+  if (bIgnorerelevant)
+    return !!(dwStatus & XFA_WidgetStatus_Visible);
+
+  dwFilter &= (XFA_WidgetStatus_Visible | XFA_WidgetStatus_Viewable |
+               XFA_WidgetStatus_Printable);
+  return (dwFilter & dwStatus) == dwFilter;
+}
+
+bool IsLayoutElement(XFA_Element eElement, bool bLayoutContainer) {
+  switch (eElement) {
+    case XFA_Element::Draw:
+    case XFA_Element::Field:
+    case XFA_Element::InstanceManager:
+      return !bLayoutContainer;
+    case XFA_Element::Area:
+    case XFA_Element::Subform:
+    case XFA_Element::ExclGroup:
+    case XFA_Element::SubformSet:
+    case XFA_Element::PageArea:
+    case XFA_Element::Form:
+      return true;
+    default:
+      return false;
+  }
+}
+
+}  // namespace
+
+CXFA_FFPageView::CXFA_FFPageView(CXFA_FFDocView* pDocView, CXFA_Node* pPageArea)
+    : CXFA_ContainerLayoutItem(pPageArea), m_pDocView(pDocView) {}
+
+CXFA_FFPageView::~CXFA_FFPageView() {}
+
+CXFA_FFDocView* CXFA_FFPageView::GetDocView() const {
+  return m_pDocView;
+}
+
+CFX_RectF CXFA_FFPageView::GetPageViewRect() const {
+  return CFX_RectF(0, 0, GetPageSize());
+}
+
+CFX_Matrix CXFA_FFPageView::GetDisplayMatrix(const CFX_Rect& rtDisp,
+                                             int32_t iRotate) const {
+  return GetPageMatrix(CFX_RectF(0, 0, GetPageSize()), rtDisp, iRotate, 0);
+}
+
+IXFA_WidgetIterator* CXFA_FFPageView::CreateWidgetIterator(
+    uint32_t dwTraverseWay,
+    uint32_t dwWidgetFilter) {
+  switch (dwTraverseWay) {
+    case XFA_TRAVERSEWAY_Tranvalse:
+      return new CXFA_FFTabOrderPageWidgetIterator(this, dwWidgetFilter);
+    case XFA_TRAVERSEWAY_Form:
+      return new CXFA_FFPageWidgetIterator(this, dwWidgetFilter);
+  }
+  return nullptr;
+}
+
+CXFA_FFPageWidgetIterator::CXFA_FFPageWidgetIterator(CXFA_FFPageView* pPageView,
+                                                     uint32_t dwFilter)
+    : m_pPageView(pPageView), m_dwFilter(dwFilter), m_sIterator(pPageView) {
+  m_bIgnorerelevant =
+      m_pPageView->GetDocView()->GetDoc()->GetXFADoc()->GetCurVersionMode() <
+      XFA_VERSION_205;
+}
+
+CXFA_FFPageWidgetIterator::~CXFA_FFPageWidgetIterator() {}
+
+void CXFA_FFPageWidgetIterator::Reset() {
+  m_sIterator.Reset();
+}
+CXFA_FFWidget* CXFA_FFPageWidgetIterator::MoveToFirst() {
+  m_sIterator.Reset();
+  for (CXFA_LayoutItem* pLayoutItem = m_sIterator.GetCurrent(); pLayoutItem;
+       pLayoutItem = m_sIterator.MoveToNext()) {
+    if (CXFA_FFWidget* hWidget = GetWidget(pLayoutItem)) {
+      return hWidget;
+    }
+  }
+  return nullptr;
+}
+CXFA_FFWidget* CXFA_FFPageWidgetIterator::MoveToLast() {
+  m_sIterator.SetCurrent(nullptr);
+  return MoveToPrevious();
+}
+CXFA_FFWidget* CXFA_FFPageWidgetIterator::MoveToNext() {
+  for (CXFA_LayoutItem* pLayoutItem = m_sIterator.MoveToNext(); pLayoutItem;
+       pLayoutItem = m_sIterator.MoveToNext()) {
+    if (CXFA_FFWidget* hWidget = GetWidget(pLayoutItem)) {
+      return hWidget;
+    }
+  }
+  return nullptr;
+}
+CXFA_FFWidget* CXFA_FFPageWidgetIterator::MoveToPrevious() {
+  for (CXFA_LayoutItem* pLayoutItem = m_sIterator.MoveToPrev(); pLayoutItem;
+       pLayoutItem = m_sIterator.MoveToPrev()) {
+    if (CXFA_FFWidget* hWidget = GetWidget(pLayoutItem)) {
+      return hWidget;
+    }
+  }
+  return nullptr;
+}
+CXFA_FFWidget* CXFA_FFPageWidgetIterator::GetCurrentWidget() {
+  CXFA_LayoutItem* pLayoutItem = m_sIterator.GetCurrent();
+  return pLayoutItem ? XFA_GetWidgetFromLayoutItem(pLayoutItem) : nullptr;
+}
+bool CXFA_FFPageWidgetIterator::SetCurrentWidget(CXFA_FFWidget* hWidget) {
+  return hWidget && m_sIterator.SetCurrent(hWidget);
+}
+CXFA_FFWidget* CXFA_FFPageWidgetIterator::GetWidget(
+    CXFA_LayoutItem* pLayoutItem) {
+  if (CXFA_FFWidget* pWidget = XFA_GetWidgetFromLayoutItem(pLayoutItem)) {
+    if (!PageWidgetFilter(pWidget, m_dwFilter, false, m_bIgnorerelevant)) {
+      return nullptr;
+    }
+    if (!pWidget->IsLoaded() &&
+        (pWidget->GetStatus() & XFA_WidgetStatus_Visible) != 0) {
+      pWidget->LoadWidget();
+    }
+    return pWidget;
+  }
+  return nullptr;
+}
+
+CXFA_FFTabOrderPageWidgetIterator::CXFA_FFTabOrderPageWidgetIterator(
+    CXFA_FFPageView* pPageView,
+    uint32_t dwFilter)
+    : m_pPageView(pPageView), m_dwFilter(dwFilter), m_iCurWidget(-1) {
+  m_bIgnorerelevant =
+      m_pPageView->GetDocView()->GetDoc()->GetXFADoc()->GetCurVersionMode() <
+      XFA_VERSION_205;
+  Reset();
+}
+
+CXFA_FFTabOrderPageWidgetIterator::~CXFA_FFTabOrderPageWidgetIterator() {}
+
+void CXFA_FFTabOrderPageWidgetIterator::Reset() {
+  CreateTabOrderWidgetArray();
+  m_iCurWidget = -1;
+}
+
+CXFA_FFWidget* CXFA_FFTabOrderPageWidgetIterator::MoveToFirst() {
+  for (int32_t i = 0;
+       i < pdfium::CollectionSize<int32_t>(m_TabOrderWidgetArray); i++) {
+    if (PageWidgetFilter(m_TabOrderWidgetArray[i], m_dwFilter, true,
+                         m_bIgnorerelevant)) {
+      m_iCurWidget = i;
+      return m_TabOrderWidgetArray[m_iCurWidget];
+    }
+  }
+  return nullptr;
+}
+
+CXFA_FFWidget* CXFA_FFTabOrderPageWidgetIterator::MoveToLast() {
+  for (int32_t i = pdfium::CollectionSize<int32_t>(m_TabOrderWidgetArray) - 1;
+       i >= 0; i--) {
+    if (PageWidgetFilter(m_TabOrderWidgetArray[i], m_dwFilter, true,
+                         m_bIgnorerelevant)) {
+      m_iCurWidget = i;
+      return m_TabOrderWidgetArray[m_iCurWidget];
+    }
+  }
+  return nullptr;
+}
+
+CXFA_FFWidget* CXFA_FFTabOrderPageWidgetIterator::MoveToNext() {
+  for (int32_t i = m_iCurWidget + 1;
+       i < pdfium::CollectionSize<int32_t>(m_TabOrderWidgetArray); i++) {
+    if (PageWidgetFilter(m_TabOrderWidgetArray[i], m_dwFilter, true,
+                         m_bIgnorerelevant)) {
+      m_iCurWidget = i;
+      return m_TabOrderWidgetArray[m_iCurWidget];
+    }
+  }
+  m_iCurWidget = -1;
+  return nullptr;
+}
+
+CXFA_FFWidget* CXFA_FFTabOrderPageWidgetIterator::MoveToPrevious() {
+  for (int32_t i = m_iCurWidget - 1; i >= 0; i--) {
+    if (PageWidgetFilter(m_TabOrderWidgetArray[i], m_dwFilter, true,
+                         m_bIgnorerelevant)) {
+      m_iCurWidget = i;
+      return m_TabOrderWidgetArray[m_iCurWidget];
+    }
+  }
+  m_iCurWidget = -1;
+  return nullptr;
+}
+
+CXFA_FFWidget* CXFA_FFTabOrderPageWidgetIterator::GetCurrentWidget() {
+  return m_iCurWidget >= 0 ? m_TabOrderWidgetArray[m_iCurWidget] : nullptr;
+}
+
+bool CXFA_FFTabOrderPageWidgetIterator::SetCurrentWidget(
+    CXFA_FFWidget* hWidget) {
+  auto it = std::find(m_TabOrderWidgetArray.begin(),
+                      m_TabOrderWidgetArray.end(), hWidget);
+  if (it == m_TabOrderWidgetArray.end())
+    return false;
+
+  m_iCurWidget = it - m_TabOrderWidgetArray.begin();
+  return true;
+}
+
+CXFA_FFWidget* CXFA_FFTabOrderPageWidgetIterator::GetTraverseWidget(
+    CXFA_FFWidget* pWidget) {
+  CXFA_WidgetAcc* pAcc = pWidget->GetDataAcc();
+  CXFA_Node* pTraversal = pAcc->GetNode()->GetChild(0, XFA_Element::Traversal);
+  if (pTraversal) {
+    CXFA_Node* pTraverse = pTraversal->GetChild(0, XFA_Element::Traverse);
+    if (pTraverse) {
+      CFX_WideString wsTraverseWidgetName;
+      if (pTraverse->GetAttribute(XFA_ATTRIBUTE_Ref, wsTraverseWidgetName)) {
+        return FindWidgetByName(wsTraverseWidgetName, pWidget);
+      }
+    }
+  }
+  return nullptr;
+}
+CXFA_FFWidget* CXFA_FFTabOrderPageWidgetIterator::FindWidgetByName(
+    const CFX_WideString& wsWidgetName,
+    CXFA_FFWidget* pRefWidget) {
+  return pRefWidget->GetDocView()->GetWidgetByName(wsWidgetName, pRefWidget);
+}
+
+void CXFA_FFTabOrderPageWidgetIterator::CreateTabOrderWidgetArray() {
+  m_TabOrderWidgetArray.clear();
+
+  std::vector<CXFA_FFWidget*> SpaceOrderWidgetArray;
+  CreateSpaceOrderWidgetArray(&SpaceOrderWidgetArray);
+  if (SpaceOrderWidgetArray.empty())
+    return;
+
+  int32_t nWidgetCount = pdfium::CollectionSize<int32_t>(SpaceOrderWidgetArray);
+  CXFA_FFWidget* hWidget = SpaceOrderWidgetArray[0];
+  while (pdfium::CollectionSize<int32_t>(m_TabOrderWidgetArray) <
+         nWidgetCount) {
+    if (!pdfium::ContainsValue(m_TabOrderWidgetArray, hWidget)) {
+      m_TabOrderWidgetArray.push_back(hWidget);
+      CXFA_WidgetAcc* pWidgetAcc = hWidget->GetDataAcc();
+      if (pWidgetAcc->GetUIType() == XFA_Element::ExclGroup) {
+        auto it = std::find(SpaceOrderWidgetArray.begin(),
+                            SpaceOrderWidgetArray.end(), hWidget);
+        int32_t iWidgetIndex = it != SpaceOrderWidgetArray.end()
+                                   ? it - SpaceOrderWidgetArray.begin() + 1
+                                   : 0;
+        while (true) {
+          CXFA_FFWidget* pRadio =
+              SpaceOrderWidgetArray[iWidgetIndex % nWidgetCount];
+          if (pRadio->GetDataAcc()->GetExclGroup() != pWidgetAcc) {
+            break;
+          }
+          if (!pdfium::ContainsValue(m_TabOrderWidgetArray, hWidget)) {
+            m_TabOrderWidgetArray.push_back(pRadio);
+          }
+          iWidgetIndex++;
+        }
+      }
+      if (CXFA_FFWidget* hTraverseWidget = GetTraverseWidget(hWidget)) {
+        hWidget = hTraverseWidget;
+        continue;
+      }
+    }
+    auto it = std::find(SpaceOrderWidgetArray.begin(),
+                        SpaceOrderWidgetArray.end(), hWidget);
+    int32_t iWidgetIndex = it != SpaceOrderWidgetArray.end()
+                               ? it - SpaceOrderWidgetArray.begin() + 1
+                               : 0;
+    hWidget = SpaceOrderWidgetArray[iWidgetIndex % nWidgetCount];
+  }
+}
+
+static int32_t XFA_TabOrderWidgetComparator(const void* phWidget1,
+                                            const void* phWidget2) {
+  auto* param1 = *static_cast<CXFA_TabParam**>(const_cast<void*>(phWidget1));
+  auto* param2 = *static_cast<CXFA_TabParam**>(const_cast<void*>(phWidget2));
+  CFX_RectF rt1 = param1->m_pWidget->GetWidgetRect();
+  CFX_RectF rt2 = param2->m_pWidget->GetWidgetRect();
+  float x1 = rt1.left, y1 = rt1.top, x2 = rt2.left, y2 = rt2.top;
+  if (y1 < y2 || (y1 - y2 < XFA_FLOAT_PERCISION && x1 < x2))
+    return -1;
+  return 1;
+}
+
+void CXFA_FFTabOrderPageWidgetIterator::OrderContainer(
+    CXFA_LayoutItemIterator* sIterator,
+    CXFA_LayoutItem* pContainerItem,
+    CXFA_TabParam* pContainer,
+    bool& bCurrentItem,
+    bool& bContentArea,
+    bool bMarsterPage) {
+  CFX_ArrayTemplate<CXFA_TabParam*> tabParams;
+  CXFA_LayoutItem* pSearchItem = sIterator->MoveToNext();
+  while (pSearchItem) {
+    if (!pSearchItem->IsContentLayoutItem()) {
+      bContentArea = true;
+      pSearchItem = sIterator->MoveToNext();
+      continue;
+    }
+    if (bMarsterPage && bContentArea) {
+      break;
+    }
+    if (bMarsterPage || bContentArea) {
+      CXFA_FFWidget* hWidget = GetWidget(pSearchItem);
+      if (!hWidget) {
+        pSearchItem = sIterator->MoveToNext();
+        continue;
+      }
+      if (pContainerItem && (pSearchItem->GetParent() != pContainerItem)) {
+        bCurrentItem = true;
+        break;
+      }
+      CXFA_TabParam* pParam = new CXFA_TabParam;
+      pParam->m_pWidget = hWidget;
+      tabParams.Add(pParam);
+      if (IsLayoutElement(pSearchItem->GetFormNode()->GetElementType(), true)) {
+        OrderContainer(sIterator, pSearchItem, pParam, bCurrentItem,
+                       bContentArea, bMarsterPage);
+      }
+    }
+    if (bCurrentItem) {
+      pSearchItem = sIterator->GetCurrent();
+      bCurrentItem = false;
+    } else {
+      pSearchItem = sIterator->MoveToNext();
+    }
+  }
+  int32_t iChildren = tabParams.GetSize();
+  if (iChildren > 1) {
+    FXSYS_qsort(tabParams.GetData(), iChildren, sizeof(void*),
+                XFA_TabOrderWidgetComparator);
+  }
+  for (int32_t iStart = 0; iStart < iChildren; iStart++) {
+    std::unique_ptr<CXFA_TabParam> pParam(tabParams[iStart]);
+    pContainer->m_Children.push_back(pParam->m_pWidget);
+    pContainer->m_Children.insert(pContainer->m_Children.end(),
+                                  pParam->m_Children.begin(),
+                                  pParam->m_Children.end());
+  }
+  tabParams.RemoveAll();
+}
+void CXFA_FFTabOrderPageWidgetIterator::CreateSpaceOrderWidgetArray(
+    std::vector<CXFA_FFWidget*>* WidgetArray) {
+  CXFA_LayoutItemIterator sIterator(m_pPageView);
+  auto pParam = pdfium::MakeUnique<CXFA_TabParam>();
+  bool bCurrentItem = false;
+  bool bContentArea = false;
+  OrderContainer(&sIterator, nullptr, pParam.get(), bCurrentItem, bContentArea);
+  WidgetArray->insert(WidgetArray->end(), pParam->m_Children.begin(),
+                      pParam->m_Children.end());
+
+  sIterator.Reset();
+  bCurrentItem = false;
+  bContentArea = false;
+  pParam->m_Children.clear();
+  OrderContainer(&sIterator, nullptr, pParam.get(), bCurrentItem, bContentArea,
+                 true);
+  WidgetArray->insert(WidgetArray->end(), pParam->m_Children.begin(),
+                      pParam->m_Children.end());
+}
+
+CXFA_FFWidget* CXFA_FFTabOrderPageWidgetIterator::GetWidget(
+    CXFA_LayoutItem* pLayoutItem) {
+  if (CXFA_FFWidget* pWidget = XFA_GetWidgetFromLayoutItem(pLayoutItem)) {
+    if (!pWidget->IsLoaded() &&
+        (pWidget->GetStatus() & XFA_WidgetStatus_Visible)) {
+      pWidget->LoadWidget();
+    }
+    return pWidget;
+  }
+  return nullptr;
+}
+
+CXFA_TabParam::CXFA_TabParam() : m_pWidget(nullptr) {}
+
+CXFA_TabParam::~CXFA_TabParam() {}