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// 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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