From 5110c4743751145c4ae1934cd1d83bc6c55bb43f Mon Sep 17 00:00:00 2001
From: John Abd-El-Malek <jabdelmalek@google.com>
Date: Sat, 17 May 2014 22:33:34 -0700
Subject: Initial commit.

---
 fpdfsdk/src/pdfwindow/PWL_Caret.cpp | 197 ++++++++++++++++++++++++++++++++++++
 1 file changed, 197 insertions(+)
 create mode 100644 fpdfsdk/src/pdfwindow/PWL_Caret.cpp

(limited to 'fpdfsdk/src/pdfwindow/PWL_Caret.cpp')

diff --git a/fpdfsdk/src/pdfwindow/PWL_Caret.cpp b/fpdfsdk/src/pdfwindow/PWL_Caret.cpp
new file mode 100644
index 0000000000..e54538ea73
--- /dev/null
+++ b/fpdfsdk/src/pdfwindow/PWL_Caret.cpp
@@ -0,0 +1,197 @@
+// 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 "../../include/pdfwindow/PDFWindow.h"
+#include "../../include/pdfwindow/PWL_Wnd.h"
+#include "../../include/pdfwindow/PWL_Caret.h"
+#include "../../include/pdfwindow/PWL_Utils.h"
+
+#define PWL_CARET_FLASHINTERVAL		500
+
+//////////////////////////////////////////////////////////////////////
+// Construction/Destruction
+//////////////////////////////////////////////////////////////////////
+
+CPWL_Caret::CPWL_Caret() :
+	m_bFlash(FALSE),
+	m_ptHead(0,0),
+	m_ptFoot(0,0),
+	m_fWidth(0.4f),
+	m_nDelay(0)
+{
+}
+
+CPWL_Caret::~CPWL_Caret()
+{
+}
+
+CFX_ByteString CPWL_Caret::GetClassName() const
+{
+	return "CPWL_Caret";
+}
+
+void CPWL_Caret::GetThisAppearanceStream(CFX_ByteTextBuf & sAppStream)
+{
+	GetCaretApp(sAppStream,CPDF_Point(0.0f,0.0f));
+}
+
+void CPWL_Caret::DrawThisAppearance(CFX_RenderDevice* pDevice, CPDF_Matrix* pUser2Device)
+{
+	if (IsVisible() && m_bFlash)
+	{
+		CPDF_Rect rcRect = GetCaretRect();
+		CPDF_Rect rcClip = GetClipRect();
+
+		CFX_PathData path;
+
+		path.SetPointCount(2);
+		
+		FX_FLOAT fCaretX = rcRect.left + m_fWidth * 0.5f;
+		FX_FLOAT fCaretTop = rcRect.top;
+		FX_FLOAT fCaretBottom = rcRect.bottom;
+
+		if (!rcClip.IsEmpty())
+		{
+			rcRect.Intersect(rcClip);
+			if (!rcRect.IsEmpty())
+			{
+				fCaretTop = rcRect.top;
+				fCaretBottom = rcRect.bottom;
+				path.SetPoint(0, fCaretX, fCaretBottom, FXPT_MOVETO);
+				path.SetPoint(1, fCaretX, fCaretTop, FXPT_LINETO);
+			}
+			else
+			{
+				return;
+			}
+		}
+		else
+		{
+			path.SetPoint(0, fCaretX, fCaretBottom, FXPT_MOVETO);
+			path.SetPoint(1, fCaretX, fCaretTop, FXPT_LINETO);
+		}
+
+		CFX_GraphStateData gsd;
+		gsd.m_LineWidth = m_fWidth;
+
+		pDevice->DrawPath(&path, pUser2Device, &gsd,0,  ArgbEncode(255,0,0,0), FXFILL_ALTERNATE);
+	}
+}
+
+void CPWL_Caret::GetCaretApp(CFX_ByteTextBuf & sAppStream,const CPDF_Point & ptOffset)
+{
+	if (IsVisible() && m_bFlash)
+	{	
+		CFX_ByteTextBuf sCaret;
+
+		CPDF_Rect rcRect = GetCaretRect();
+		CPDF_Rect rcClip = GetClipRect();
+
+		rcRect = CPWL_Utils::OffsetRect(rcRect,ptOffset.x,ptOffset.y);
+		rcClip = CPWL_Utils::OffsetRect(rcClip,ptOffset.x,ptOffset.y);
+
+		sCaret << "q\n";
+		if (!rcClip.IsEmpty())
+		{
+			sCaret << rcClip.left << " " << rcClip.bottom + 2.5f << " " 
+				<< rcClip.right - rcClip.left << " " << rcClip.top - rcClip.bottom - 4.5f << " re W n\n";
+		}
+		sCaret << m_fWidth << " w\n0 G\n";
+		sCaret << rcRect.left + m_fWidth/2 << " " << rcRect.bottom << " m\n";
+		sCaret << rcRect.left + m_fWidth/2 << " " << rcRect.top << " l S\nQ\n";	
+
+		sAppStream << sCaret;	
+	}
+}
+
+CFX_ByteString CPWL_Caret::GetCaretAppearanceStream(const CPDF_Point & ptOffset)
+{
+	CFX_ByteTextBuf sCaret;
+	GetCaretApp(sCaret,ptOffset);
+	return sCaret.GetByteString();
+}
+
+void CPWL_Caret::TimerProc()
+{
+	if (m_nDelay > 0)
+	{
+		m_nDelay--;	
+	}
+	else
+	{
+		m_bFlash = !m_bFlash;
+		InvalidateRect();
+	}
+}
+
+CPDF_Rect CPWL_Caret::GetCaretRect() const
+{
+	return CPDF_Rect(m_ptFoot.x,
+			m_ptFoot.y,
+			m_ptHead.x + this->m_fWidth,
+			m_ptHead.y);
+}
+
+void CPWL_Caret::SetCaret(FX_BOOL bVisible, const CPDF_Point & ptHead, const CPDF_Point & ptFoot)
+{
+	if (bVisible)
+	{	
+		if (IsVisible())
+		{
+			if (m_ptHead.x != ptHead.x || m_ptHead.y != ptHead.y || 
+					m_ptFoot.x != ptFoot.x || m_ptFoot.y != ptFoot.y)
+			{
+				this->m_ptHead = ptHead;
+				this->m_ptFoot = ptFoot;
+
+				m_bFlash = TRUE;
+				//Move(GetCaretRect(),FALSE,TRUE);
+				Move(m_rcInvalid, FALSE, TRUE);
+			}
+		}
+		else
+		{
+			this->m_ptHead = ptHead;
+			this->m_ptFoot = ptFoot;
+
+			EndTimer();
+			BeginTimer(PWL_CARET_FLASHINTERVAL);
+			
+			CPWL_Wnd::SetVisible(TRUE);
+			m_bFlash = TRUE;
+
+			//Move(GetCaretRect(),FALSE,TRUE);	
+			Move(m_rcInvalid, FALSE, TRUE);
+		}		
+	}
+	else
+	{
+		this->m_ptHead = CPDF_Point(0,0);
+		this->m_ptFoot = CPDF_Point(0,0);
+
+		m_bFlash = FALSE;
+		if (IsVisible())
+		{
+			EndTimer();
+			CPWL_Wnd::SetVisible(FALSE);
+		}		
+	}
+}
+
+void CPWL_Caret::InvalidateRect(CPDF_Rect * pRect)
+{
+	if (pRect)
+	{
+		CPDF_Rect rcRefresh = CPWL_Utils::InflateRect(*pRect,0.5f);
+		rcRefresh.top += 1;
+		rcRefresh.bottom -= 1;	
+		
+		CPWL_Wnd::InvalidateRect(&rcRefresh);
+	}
+	else
+		CPWL_Wnd::InvalidateRect(pRect);
+}
+
-- 
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