1 // Copyright 2016 The PDFium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #include "xfa/fxfa/layout/cxfa_layoutprocessor.h"
8
9 #include "fxjs/gc/container_trace.h"
10 #include "fxjs/xfa/cjx_object.h"
11 #include "v8/include/cppgc/heap.h"
12 #include "xfa/fxfa/layout/cxfa_contentlayoutitem.h"
13 #include "xfa/fxfa/layout/cxfa_contentlayoutprocessor.h"
14 #include "xfa/fxfa/layout/cxfa_viewlayoutprocessor.h"
15 #include "xfa/fxfa/parser/cxfa_document.h"
16 #include "xfa/fxfa/parser/cxfa_localemgr.h"
17 #include "xfa/fxfa/parser/cxfa_measurement.h"
18 #include "xfa/fxfa/parser/cxfa_node.h"
19 #include "xfa/fxfa/parser/cxfa_subform.h"
20 #include "xfa/fxfa/parser/xfa_document_datamerger_imp.h"
21 #include "xfa/fxfa/parser/xfa_utils.h"
22
23 // static
FromDocument(const CXFA_Document * pXFADoc)24 CXFA_LayoutProcessor* CXFA_LayoutProcessor::FromDocument(
25 const CXFA_Document* pXFADoc) {
26 return static_cast<CXFA_LayoutProcessor*>(pXFADoc->GetLayoutProcessor());
27 }
28
CXFA_LayoutProcessor(cppgc::Heap * pHeap)29 CXFA_LayoutProcessor::CXFA_LayoutProcessor(cppgc::Heap* pHeap)
30 : m_pHeap(pHeap) {}
31
32 CXFA_LayoutProcessor::~CXFA_LayoutProcessor() = default;
33
Trace(cppgc::Visitor * visitor) const34 void CXFA_LayoutProcessor::Trace(cppgc::Visitor* visitor) const {
35 CXFA_Document::LayoutProcessorIface::Trace(visitor);
36 visitor->Trace(m_pViewLayoutProcessor);
37 visitor->Trace(m_pContentLayoutProcessor);
38 }
39
SetForceRelayout()40 void CXFA_LayoutProcessor::SetForceRelayout() {
41 m_bNeedLayout = true;
42 }
43
StartLayout()44 int32_t CXFA_LayoutProcessor::StartLayout() {
45 return NeedLayout() ? RestartLayout() : 100;
46 }
47
RestartLayout()48 int32_t CXFA_LayoutProcessor::RestartLayout() {
49 m_pContentLayoutProcessor = nullptr;
50 m_nProgressCounter = 0;
51 CXFA_Node* pFormPacketNode =
52 ToNode(GetDocument()->GetXFAObject(XFA_HASHCODE_Form));
53 if (!pFormPacketNode)
54 return -1;
55
56 CXFA_Subform* pFormRoot =
57 pFormPacketNode->GetFirstChildByClass<CXFA_Subform>(XFA_Element::Subform);
58 if (!pFormRoot)
59 return -1;
60
61 if (!m_pViewLayoutProcessor) {
62 m_pViewLayoutProcessor =
63 cppgc::MakeGarbageCollected<CXFA_ViewLayoutProcessor>(
64 GetHeap()->GetAllocationHandle(), GetHeap(), this);
65 }
66 if (!m_pViewLayoutProcessor->InitLayoutPage(pFormRoot))
67 return -1;
68
69 if (!m_pViewLayoutProcessor->PrepareFirstPage(pFormRoot))
70 return -1;
71
72 m_pContentLayoutProcessor =
73 cppgc::MakeGarbageCollected<CXFA_ContentLayoutProcessor>(
74 GetHeap()->GetAllocationHandle(), GetHeap(), pFormRoot,
75 m_pViewLayoutProcessor);
76 m_nProgressCounter = 1;
77 return 0;
78 }
79
DoLayout()80 int32_t CXFA_LayoutProcessor::DoLayout() {
81 if (m_nProgressCounter < 1)
82 return -1;
83
84 CXFA_ContentLayoutProcessor::Result eStatus;
85 CXFA_Node* pFormNode = m_pContentLayoutProcessor->GetFormNode();
86 float fPosX =
87 pFormNode->JSObject()->GetMeasureInUnit(XFA_Attribute::X, XFA_Unit::Pt);
88 float fPosY =
89 pFormNode->JSObject()->GetMeasureInUnit(XFA_Attribute::Y, XFA_Unit::Pt);
90 do {
91 float fAvailHeight = m_pViewLayoutProcessor->GetAvailHeight();
92 eStatus =
93 m_pContentLayoutProcessor->DoLayout(true, fAvailHeight, fAvailHeight);
94 if (eStatus != CXFA_ContentLayoutProcessor::Result::kDone)
95 m_nProgressCounter++;
96
97 CXFA_ContentLayoutItem* pLayoutItem =
98 m_pContentLayoutProcessor->ExtractLayoutItem();
99 if (pLayoutItem)
100 pLayoutItem->m_sPos = CFX_PointF(fPosX, fPosY);
101
102 m_pViewLayoutProcessor->SubmitContentItem(pLayoutItem, eStatus);
103 } while (eStatus != CXFA_ContentLayoutProcessor::Result::kDone);
104
105 if (eStatus == CXFA_ContentLayoutProcessor::Result::kDone) {
106 m_pViewLayoutProcessor->FinishPaginatedPageSets();
107 m_pViewLayoutProcessor->SyncLayoutData();
108 m_bHasChangedContainers = false;
109 m_bNeedLayout = false;
110 }
111 return 100 *
112 (eStatus == CXFA_ContentLayoutProcessor::Result::kDone
113 ? m_nProgressCounter
114 : m_nProgressCounter - 1) /
115 m_nProgressCounter;
116 }
117
IncrementLayout()118 bool CXFA_LayoutProcessor::IncrementLayout() {
119 if (m_bNeedLayout) {
120 RestartLayout();
121 return DoLayout() == 100;
122 }
123 return !m_bHasChangedContainers;
124 }
125
CountPages() const126 int32_t CXFA_LayoutProcessor::CountPages() const {
127 return m_pViewLayoutProcessor ? m_pViewLayoutProcessor->GetPageCount() : 0;
128 }
129
GetPage(int32_t index) const130 CXFA_ViewLayoutItem* CXFA_LayoutProcessor::GetPage(int32_t index) const {
131 return m_pViewLayoutProcessor ? m_pViewLayoutProcessor->GetPage(index)
132 : nullptr;
133 }
134
GetLayoutItem(CXFA_Node * pFormItem)135 CXFA_LayoutItem* CXFA_LayoutProcessor::GetLayoutItem(CXFA_Node* pFormItem) {
136 return pFormItem->JSObject()->GetLayoutItem();
137 }
138
SetHasChangedContainer()139 void CXFA_LayoutProcessor::SetHasChangedContainer() {
140 m_bHasChangedContainers = true;
141 }
142
NeedLayout() const143 bool CXFA_LayoutProcessor::NeedLayout() const {
144 return m_bNeedLayout || m_bHasChangedContainers;
145 }
146