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/pwl/cpwl_caret.h"
8
9 #include <sstream>
10
11 #include "core/fxge/cfx_graphstatedata.h"
12 #include "core/fxge/cfx_pathdata.h"
13 #include "core/fxge/cfx_renderdevice.h"
14 #include "fpdfsdk/pwl/cpwl_wnd.h"
15
16 #define PWL_CARET_FLASHINTERVAL 500
17
CPWL_Caret()18 CPWL_Caret::CPWL_Caret() : m_bFlash(false), m_fWidth(0.4f), m_nDelay(0) {}
19
~CPWL_Caret()20 CPWL_Caret::~CPWL_Caret() {}
21
GetClassName() const22 ByteString CPWL_Caret::GetClassName() const {
23 return "CPWL_Caret";
24 }
25
DrawThisAppearance(CFX_RenderDevice * pDevice,const CFX_Matrix & mtUser2Device)26 void CPWL_Caret::DrawThisAppearance(CFX_RenderDevice* pDevice,
27 const CFX_Matrix& mtUser2Device) {
28 if (!IsVisible() || !m_bFlash)
29 return;
30
31 CFX_FloatRect rcRect = GetCaretRect();
32 CFX_FloatRect rcClip = GetClipRect();
33 CFX_PathData path;
34
35 float fCaretX = rcRect.left + m_fWidth * 0.5f;
36 float fCaretTop = rcRect.top;
37 float fCaretBottom = rcRect.bottom;
38 if (!rcClip.IsEmpty()) {
39 rcRect.Intersect(rcClip);
40 if (rcRect.IsEmpty())
41 return;
42
43 fCaretTop = rcRect.top;
44 fCaretBottom = rcRect.bottom;
45 }
46
47 path.AppendPoint(CFX_PointF(fCaretX, fCaretBottom), FXPT_TYPE::MoveTo, false);
48 path.AppendPoint(CFX_PointF(fCaretX, fCaretTop), FXPT_TYPE::LineTo, false);
49
50 CFX_GraphStateData gsd;
51 gsd.m_LineWidth = m_fWidth;
52 pDevice->DrawPath(&path, &mtUser2Device, &gsd, 0, ArgbEncode(255, 0, 0, 0),
53 FXFILL_ALTERNATE);
54 }
55
TimerProc()56 void CPWL_Caret::TimerProc() {
57 if (m_nDelay > 0) {
58 --m_nDelay;
59 return;
60 }
61
62 m_bFlash = !m_bFlash;
63 InvalidateRect(nullptr);
64 // Note, |this| may no longer be viable at this point. If more work needs
65 // to be done, add an observer.
66 }
67
GetCaretRect() const68 CFX_FloatRect CPWL_Caret::GetCaretRect() const {
69 return CFX_FloatRect(m_ptFoot.x, m_ptFoot.y, m_ptHead.x + m_fWidth,
70 m_ptHead.y);
71 }
72
SetCaret(bool bVisible,const CFX_PointF & ptHead,const CFX_PointF & ptFoot)73 void CPWL_Caret::SetCaret(bool bVisible,
74 const CFX_PointF& ptHead,
75 const CFX_PointF& ptFoot) {
76 if (!bVisible) {
77 m_ptHead = CFX_PointF();
78 m_ptFoot = CFX_PointF();
79 m_bFlash = false;
80 if (!IsVisible())
81 return;
82
83 EndTimer();
84 CPWL_Wnd::SetVisible(false);
85 // Note, |this| may no longer be viable at this point. If more work needs
86 // to be done, check the return value of SetVisible().
87 return;
88 }
89
90 if (!IsVisible()) {
91 m_ptHead = ptHead;
92 m_ptFoot = ptFoot;
93 EndTimer();
94 BeginTimer(PWL_CARET_FLASHINTERVAL);
95
96 if (!CPWL_Wnd::SetVisible(true))
97 return;
98
99 m_bFlash = true;
100 Move(m_rcInvalid, false, true);
101 // Note, |this| may no longer be viable at this point. If more work needs
102 // to be done, check the return value of Move().
103 return;
104 }
105
106 if (m_ptHead == ptHead && m_ptFoot == ptFoot)
107 return;
108
109 m_ptHead = ptHead;
110 m_ptFoot = ptFoot;
111 m_bFlash = true;
112 Move(m_rcInvalid, false, true);
113 // Note, |this| may no longer be viable at this point. If more work
114 // needs to be done, check the return value of Move().
115 }
116
InvalidateRect(CFX_FloatRect * pRect)117 bool CPWL_Caret::InvalidateRect(CFX_FloatRect* pRect) {
118 if (!pRect) {
119 return CPWL_Wnd::InvalidateRect(nullptr);
120 }
121
122 CFX_FloatRect rcRefresh = *pRect;
123 if (!rcRefresh.IsEmpty()) {
124 rcRefresh.Inflate(0.5f, 0.5f);
125 rcRefresh.Normalize();
126 }
127 rcRefresh.top += 1;
128 rcRefresh.bottom -= 1;
129 return CPWL_Wnd::InvalidateRect(&rcRefresh);
130 }
131
SetVisible(bool bVisible)132 bool CPWL_Caret::SetVisible(bool bVisible) {
133 return true;
134 }
135