1 // Copyright 2014 PDFium Authors. All rights reserved.
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 "fpdfsdk/pdfwindow/PWL_Caret.h"
8
9 #include "core/fxge/cfx_graphstatedata.h"
10 #include "core/fxge/cfx_pathdata.h"
11 #include "core/fxge/cfx_renderdevice.h"
12 #include "fpdfsdk/pdfwindow/PWL_Utils.h"
13 #include "fpdfsdk/pdfwindow/PWL_Wnd.h"
14
15 #define PWL_CARET_FLASHINTERVAL 500
16
PWL_CARET_INFO()17 PWL_CARET_INFO::PWL_CARET_INFO() : bVisible(false) {}
18
CPWL_Caret()19 CPWL_Caret::CPWL_Caret() : m_bFlash(false), m_fWidth(0.4f), m_nDelay(0) {}
20
~CPWL_Caret()21 CPWL_Caret::~CPWL_Caret() {}
22
GetClassName() const23 CFX_ByteString CPWL_Caret::GetClassName() const {
24 return "CPWL_Caret";
25 }
26
GetThisAppearanceStream(CFX_ByteTextBuf & sAppStream)27 void CPWL_Caret::GetThisAppearanceStream(CFX_ByteTextBuf& sAppStream) {
28 GetCaretApp(sAppStream, CFX_PointF());
29 }
30
DrawThisAppearance(CFX_RenderDevice * pDevice,CFX_Matrix * pUser2Device)31 void CPWL_Caret::DrawThisAppearance(CFX_RenderDevice* pDevice,
32 CFX_Matrix* pUser2Device) {
33 if (IsVisible() && m_bFlash) {
34 CFX_FloatRect rcRect = GetCaretRect();
35 CFX_FloatRect rcClip = GetClipRect();
36 CFX_PathData path;
37
38 FX_FLOAT fCaretX = rcRect.left + m_fWidth * 0.5f;
39 FX_FLOAT fCaretTop = rcRect.top;
40 FX_FLOAT fCaretBottom = rcRect.bottom;
41 if (!rcClip.IsEmpty()) {
42 rcRect.Intersect(rcClip);
43 if (rcRect.IsEmpty())
44 return;
45
46 fCaretTop = rcRect.top;
47 fCaretBottom = rcRect.bottom;
48 }
49
50 path.AppendPoint(CFX_PointF(fCaretX, fCaretBottom), FXPT_TYPE::MoveTo,
51 false);
52 path.AppendPoint(CFX_PointF(fCaretX, fCaretTop), FXPT_TYPE::LineTo, false);
53
54 CFX_GraphStateData gsd;
55 gsd.m_LineWidth = m_fWidth;
56 pDevice->DrawPath(&path, pUser2Device, &gsd, 0, ArgbEncode(255, 0, 0, 0),
57 FXFILL_ALTERNATE);
58 }
59 }
60
GetCaretApp(CFX_ByteTextBuf & sAppStream,const CFX_PointF & ptOffset)61 void CPWL_Caret::GetCaretApp(CFX_ByteTextBuf& sAppStream,
62 const CFX_PointF& ptOffset) {
63 if (IsVisible() && m_bFlash) {
64 CFX_ByteTextBuf sCaret;
65
66 CFX_FloatRect rcRect = GetCaretRect();
67 CFX_FloatRect rcClip = GetClipRect();
68
69 rcRect = CPWL_Utils::OffsetRect(rcRect, ptOffset.x, ptOffset.y);
70 rcClip = CPWL_Utils::OffsetRect(rcClip, ptOffset.x, ptOffset.y);
71
72 sCaret << "q\n";
73 if (!rcClip.IsEmpty()) {
74 sCaret << rcClip.left << " " << rcClip.bottom + 2.5f << " "
75 << rcClip.right - rcClip.left << " "
76 << rcClip.top - rcClip.bottom - 4.5f << " re W n\n";
77 }
78 sCaret << m_fWidth << " w\n0 G\n";
79 sCaret << rcRect.left + m_fWidth / 2 << " " << rcRect.bottom << " m\n";
80 sCaret << rcRect.left + m_fWidth / 2 << " " << rcRect.top << " l S\nQ\n";
81
82 sAppStream << sCaret;
83 }
84 }
85
GetCaretAppearanceStream(const CFX_PointF & ptOffset)86 CFX_ByteString CPWL_Caret::GetCaretAppearanceStream(
87 const CFX_PointF& ptOffset) {
88 CFX_ByteTextBuf sCaret;
89 GetCaretApp(sCaret, ptOffset);
90 return sCaret.MakeString();
91 }
92
TimerProc()93 void CPWL_Caret::TimerProc() {
94 if (m_nDelay > 0) {
95 m_nDelay--;
96 } else {
97 m_bFlash = !m_bFlash;
98 InvalidateRect();
99 }
100 }
101
GetCaretRect() const102 CFX_FloatRect CPWL_Caret::GetCaretRect() const {
103 return CFX_FloatRect(m_ptFoot.x, m_ptFoot.y, m_ptHead.x + m_fWidth,
104 m_ptHead.y);
105 }
106
SetCaret(bool bVisible,const CFX_PointF & ptHead,const CFX_PointF & ptFoot)107 void CPWL_Caret::SetCaret(bool bVisible,
108 const CFX_PointF& ptHead,
109 const CFX_PointF& ptFoot) {
110 if (bVisible) {
111 if (IsVisible()) {
112 if (m_ptHead != ptHead || m_ptFoot != ptFoot) {
113 m_ptHead = ptHead;
114 m_ptFoot = ptFoot;
115 m_bFlash = true;
116 Move(m_rcInvalid, false, true);
117 }
118 } else {
119 m_ptHead = ptHead;
120 m_ptFoot = ptFoot;
121 EndTimer();
122 BeginTimer(PWL_CARET_FLASHINTERVAL);
123 CPWL_Wnd::SetVisible(true);
124 m_bFlash = true;
125 Move(m_rcInvalid, false, true);
126 }
127 } else {
128 m_ptHead = CFX_PointF();
129 m_ptFoot = CFX_PointF();
130 m_bFlash = false;
131 if (IsVisible()) {
132 EndTimer();
133 CPWL_Wnd::SetVisible(false);
134 }
135 }
136 }
137
InvalidateRect(CFX_FloatRect * pRect)138 void CPWL_Caret::InvalidateRect(CFX_FloatRect* pRect) {
139 if (pRect) {
140 CFX_FloatRect rcRefresh = CPWL_Utils::InflateRect(*pRect, 0.5f);
141 rcRefresh.top += 1;
142 rcRefresh.bottom -= 1;
143 CPWL_Wnd::InvalidateRect(&rcRefresh);
144 } else {
145 CPWL_Wnd::InvalidateRect(pRect);
146 }
147 }
148