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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 "fpdfsdk/pwl/cpwl_caret.h"
#include <sstream>
#include "core/fxge/cfx_graphstatedata.h"
#include "core/fxge/cfx_pathdata.h"
#include "core/fxge/cfx_renderdevice.h"
#include "fpdfsdk/pwl/cpwl_wnd.h"
#define PWL_CARET_FLASHINTERVAL 500
CPWL_Caret::CPWL_Caret() : m_bFlash(false), m_fWidth(0.4f), m_nDelay(0) {}
CPWL_Caret::~CPWL_Caret() {}
void CPWL_Caret::DrawThisAppearance(CFX_RenderDevice* pDevice,
const CFX_Matrix& mtUser2Device) {
if (!IsVisible() || !m_bFlash)
return;
CFX_FloatRect rcRect = GetCaretRect();
CFX_FloatRect rcClip = GetClipRect();
CFX_PathData path;
float fCaretX = rcRect.left + m_fWidth * 0.5f;
float fCaretTop = rcRect.top;
float fCaretBottom = rcRect.bottom;
if (!rcClip.IsEmpty()) {
rcRect.Intersect(rcClip);
if (rcRect.IsEmpty())
return;
fCaretTop = rcRect.top;
fCaretBottom = rcRect.bottom;
}
path.AppendPoint(CFX_PointF(fCaretX, fCaretBottom), FXPT_TYPE::MoveTo, false);
path.AppendPoint(CFX_PointF(fCaretX, fCaretTop), FXPT_TYPE::LineTo, false);
CFX_GraphStateData gsd;
gsd.m_LineWidth = m_fWidth;
pDevice->DrawPath(&path, &mtUser2Device, &gsd, 0, ArgbEncode(255, 0, 0, 0),
FXFILL_ALTERNATE);
}
void CPWL_Caret::TimerProc() {
if (m_nDelay > 0) {
--m_nDelay;
return;
}
m_bFlash = !m_bFlash;
InvalidateRect(nullptr);
// Note, |this| may no longer be viable at this point. If more work needs
// to be done, add an observer.
}
CFX_FloatRect CPWL_Caret::GetCaretRect() const {
return CFX_FloatRect(m_ptFoot.x, m_ptFoot.y, m_ptHead.x + m_fWidth,
m_ptHead.y);
}
void CPWL_Caret::SetCaret(bool bVisible,
const CFX_PointF& ptHead,
const CFX_PointF& ptFoot) {
if (!bVisible) {
m_ptHead = CFX_PointF();
m_ptFoot = CFX_PointF();
m_bFlash = false;
if (!IsVisible())
return;
EndTimer();
CPWL_Wnd::SetVisible(false);
// Note, |this| may no longer be viable at this point. If more work needs
// to be done, check the return value of SetVisible().
return;
}
if (!IsVisible()) {
m_ptHead = ptHead;
m_ptFoot = ptFoot;
EndTimer();
BeginTimer(PWL_CARET_FLASHINTERVAL);
if (!CPWL_Wnd::SetVisible(true))
return;
m_bFlash = true;
Move(m_rcInvalid, false, true);
// Note, |this| may no longer be viable at this point. If more work needs
// to be done, check the return value of Move().
return;
}
if (m_ptHead == ptHead && m_ptFoot == ptFoot)
return;
m_ptHead = ptHead;
m_ptFoot = ptFoot;
m_bFlash = true;
Move(m_rcInvalid, false, true);
// Note, |this| may no longer be viable at this point. If more work
// needs to be done, check the return value of Move().
}
bool CPWL_Caret::InvalidateRect(CFX_FloatRect* pRect) {
if (!pRect) {
return CPWL_Wnd::InvalidateRect(nullptr);
}
CFX_FloatRect rcRefresh = *pRect;
if (!rcRefresh.IsEmpty()) {
rcRefresh.Inflate(0.5f, 0.5f);
rcRefresh.Normalize();
}
rcRefresh.top += 1;
rcRefresh.bottom -= 1;
return CPWL_Wnd::InvalidateRect(&rcRefresh);
}
bool CPWL_Caret::SetVisible(bool bVisible) {
return true;
}
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