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/include/pdfwindow/PWL_Caret.h" 8 #include "fpdfsdk/include/pdfwindow/PWL_Utils.h" 9 #include "fpdfsdk/include/pdfwindow/PWL_Wnd.h" 10 11 #define PWL_CARET_FLASHINTERVAL 500 12 13 CPWL_Caret::CPWL_Caret() 14 : m_bFlash(FALSE), 15 m_ptHead(0, 0), 16 m_ptFoot(0, 0), 17 m_fWidth(0.4f), 18 m_nDelay(0) {} 19 20 CPWL_Caret::~CPWL_Caret() {} 21 22 CFX_ByteString CPWL_Caret::GetClassName() const { 23 return "CPWL_Caret"; 24 } 25 26 void CPWL_Caret::GetThisAppearanceStream(CFX_ByteTextBuf& sAppStream) { 27 GetCaretApp(sAppStream, CPDF_Point(0.0f, 0.0f)); 28 } 29 30 void CPWL_Caret::DrawThisAppearance(CFX_RenderDevice* pDevice, 31 CFX_Matrix* pUser2Device) { 32 if (IsVisible() && m_bFlash) { 33 CPDF_Rect rcRect = GetCaretRect(); 34 CPDF_Rect rcClip = GetClipRect(); 35 36 CFX_PathData path; 37 38 path.SetPointCount(2); 39 40 FX_FLOAT fCaretX = rcRect.left + m_fWidth * 0.5f; 41 FX_FLOAT fCaretTop = rcRect.top; 42 FX_FLOAT fCaretBottom = rcRect.bottom; 43 44 if (!rcClip.IsEmpty()) { 45 rcRect.Intersect(rcClip); 46 if (!rcRect.IsEmpty()) { 47 fCaretTop = rcRect.top; 48 fCaretBottom = rcRect.bottom; 49 path.SetPoint(0, fCaretX, fCaretBottom, FXPT_MOVETO); 50 path.SetPoint(1, fCaretX, fCaretTop, FXPT_LINETO); 51 } else { 52 return; 53 } 54 } else { 55 path.SetPoint(0, fCaretX, fCaretBottom, FXPT_MOVETO); 56 path.SetPoint(1, fCaretX, fCaretTop, FXPT_LINETO); 57 } 58 59 CFX_GraphStateData gsd; 60 gsd.m_LineWidth = m_fWidth; 61 62 pDevice->DrawPath(&path, pUser2Device, &gsd, 0, ArgbEncode(255, 0, 0, 0), 63 FXFILL_ALTERNATE); 64 } 65 } 66 67 void CPWL_Caret::GetCaretApp(CFX_ByteTextBuf& sAppStream, 68 const CPDF_Point& ptOffset) { 69 if (IsVisible() && m_bFlash) { 70 CFX_ByteTextBuf sCaret; 71 72 CPDF_Rect rcRect = GetCaretRect(); 73 CPDF_Rect rcClip = GetClipRect(); 74 75 rcRect = CPWL_Utils::OffsetRect(rcRect, ptOffset.x, ptOffset.y); 76 rcClip = CPWL_Utils::OffsetRect(rcClip, ptOffset.x, ptOffset.y); 77 78 sCaret << "q\n"; 79 if (!rcClip.IsEmpty()) { 80 sCaret << rcClip.left << " " << rcClip.bottom + 2.5f << " " 81 << rcClip.right - rcClip.left << " " 82 << rcClip.top - rcClip.bottom - 4.5f << " re W n\n"; 83 } 84 sCaret << m_fWidth << " w\n0 G\n"; 85 sCaret << rcRect.left + m_fWidth / 2 << " " << rcRect.bottom << " m\n"; 86 sCaret << rcRect.left + m_fWidth / 2 << " " << rcRect.top << " l S\nQ\n"; 87 88 sAppStream << sCaret; 89 } 90 } 91 92 CFX_ByteString CPWL_Caret::GetCaretAppearanceStream( 93 const CPDF_Point& ptOffset) { 94 CFX_ByteTextBuf sCaret; 95 GetCaretApp(sCaret, ptOffset); 96 return sCaret.GetByteString(); 97 } 98 99 void CPWL_Caret::TimerProc() { 100 if (m_nDelay > 0) { 101 m_nDelay--; 102 } else { 103 m_bFlash = !m_bFlash; 104 InvalidateRect(); 105 } 106 } 107 108 CPDF_Rect CPWL_Caret::GetCaretRect() const { 109 return CPDF_Rect(m_ptFoot.x, m_ptFoot.y, m_ptHead.x + m_fWidth, m_ptHead.y); 110 } 111 112 void CPWL_Caret::SetCaret(FX_BOOL bVisible, 113 const CPDF_Point& ptHead, 114 const CPDF_Point& ptFoot) { 115 if (bVisible) { 116 if (IsVisible()) { 117 if (m_ptHead.x != ptHead.x || m_ptHead.y != ptHead.y || 118 m_ptFoot.x != ptFoot.x || m_ptFoot.y != ptFoot.y) { 119 m_ptHead = ptHead; 120 m_ptFoot = ptFoot; 121 122 m_bFlash = TRUE; 123 Move(m_rcInvalid, FALSE, TRUE); 124 } 125 } else { 126 m_ptHead = ptHead; 127 m_ptFoot = ptFoot; 128 129 EndTimer(); 130 BeginTimer(PWL_CARET_FLASHINTERVAL); 131 132 CPWL_Wnd::SetVisible(TRUE); 133 m_bFlash = TRUE; 134 135 Move(m_rcInvalid, FALSE, TRUE); 136 } 137 } else { 138 m_ptHead = CPDF_Point(0, 0); 139 m_ptFoot = CPDF_Point(0, 0); 140 141 m_bFlash = FALSE; 142 if (IsVisible()) { 143 EndTimer(); 144 CPWL_Wnd::SetVisible(FALSE); 145 } 146 } 147 } 148 149 void CPWL_Caret::InvalidateRect(CPDF_Rect* pRect) { 150 if (pRect) { 151 CPDF_Rect rcRefresh = CPWL_Utils::InflateRect(*pRect, 0.5f); 152 rcRefresh.top += 1; 153 rcRefresh.bottom -= 1; 154 155 CPWL_Wnd::InvalidateRect(&rcRefresh); 156 } else { 157 CPWL_Wnd::InvalidateRect(pRect); 158 } 159 } 160