// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "fpdfsdk/pdfwindow/PWL_Caret.h"
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#include "core/fxge/include/fx_ge.h"
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#include "fpdfsdk/pdfwindow/PWL_Utils.h"
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#include "fpdfsdk/pdfwindow/PWL_Wnd.h"
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#define PWL_CARET_FLASHINTERVAL 500
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CPWL_Caret::CPWL_Caret()
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: m_bFlash(FALSE),
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m_ptHead(0, 0),
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m_ptFoot(0, 0),
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m_fWidth(0.4f),
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m_nDelay(0) {}
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CPWL_Caret::~CPWL_Caret() {}
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CFX_ByteString CPWL_Caret::GetClassName() const {
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return "CPWL_Caret";
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}
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void CPWL_Caret::GetThisAppearanceStream(CFX_ByteTextBuf& sAppStream) {
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GetCaretApp(sAppStream, CFX_FloatPoint(0.0f, 0.0f));
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}
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void CPWL_Caret::DrawThisAppearance(CFX_RenderDevice* pDevice,
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CFX_Matrix* pUser2Device) {
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if (IsVisible() && m_bFlash) {
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CFX_FloatRect rcRect = GetCaretRect();
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CFX_FloatRect rcClip = GetClipRect();
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CFX_PathData path;
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path.SetPointCount(2);
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FX_FLOAT fCaretX = rcRect.left + m_fWidth * 0.5f;
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FX_FLOAT fCaretTop = rcRect.top;
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FX_FLOAT fCaretBottom = rcRect.bottom;
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if (!rcClip.IsEmpty()) {
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rcRect.Intersect(rcClip);
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if (!rcRect.IsEmpty()) {
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fCaretTop = rcRect.top;
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fCaretBottom = rcRect.bottom;
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path.SetPoint(0, fCaretX, fCaretBottom, FXPT_MOVETO);
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path.SetPoint(1, fCaretX, fCaretTop, FXPT_LINETO);
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} else {
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return;
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}
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} else {
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path.SetPoint(0, fCaretX, fCaretBottom, FXPT_MOVETO);
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path.SetPoint(1, fCaretX, fCaretTop, FXPT_LINETO);
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}
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CFX_GraphStateData gsd;
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gsd.m_LineWidth = m_fWidth;
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pDevice->DrawPath(&path, pUser2Device, &gsd, 0, ArgbEncode(255, 0, 0, 0),
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FXFILL_ALTERNATE);
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}
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}
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void CPWL_Caret::GetCaretApp(CFX_ByteTextBuf& sAppStream,
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const CFX_FloatPoint& ptOffset) {
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if (IsVisible() && m_bFlash) {
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CFX_ByteTextBuf sCaret;
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CFX_FloatRect rcRect = GetCaretRect();
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CFX_FloatRect rcClip = GetClipRect();
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rcRect = CPWL_Utils::OffsetRect(rcRect, ptOffset.x, ptOffset.y);
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rcClip = CPWL_Utils::OffsetRect(rcClip, ptOffset.x, ptOffset.y);
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sCaret << "q\n";
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if (!rcClip.IsEmpty()) {
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sCaret << rcClip.left << " " << rcClip.bottom + 2.5f << " "
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<< rcClip.right - rcClip.left << " "
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<< rcClip.top - rcClip.bottom - 4.5f << " re W n\n";
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}
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sCaret << m_fWidth << " w\n0 G\n";
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sCaret << rcRect.left + m_fWidth / 2 << " " << rcRect.bottom << " m\n";
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sCaret << rcRect.left + m_fWidth / 2 << " " << rcRect.top << " l S\nQ\n";
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sAppStream << sCaret;
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}
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}
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CFX_ByteString CPWL_Caret::GetCaretAppearanceStream(
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const CFX_FloatPoint& ptOffset) {
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CFX_ByteTextBuf sCaret;
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GetCaretApp(sCaret, ptOffset);
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return sCaret.MakeString();
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}
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void CPWL_Caret::TimerProc() {
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if (m_nDelay > 0) {
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m_nDelay--;
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} else {
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m_bFlash = !m_bFlash;
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InvalidateRect();
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}
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}
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CFX_FloatRect CPWL_Caret::GetCaretRect() const {
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return CFX_FloatRect(m_ptFoot.x, m_ptFoot.y, m_ptHead.x + m_fWidth,
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m_ptHead.y);
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}
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void CPWL_Caret::SetCaret(FX_BOOL bVisible,
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const CFX_FloatPoint& ptHead,
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const CFX_FloatPoint& ptFoot) {
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if (bVisible) {
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if (IsVisible()) {
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if (m_ptHead.x != ptHead.x || m_ptHead.y != ptHead.y ||
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m_ptFoot.x != ptFoot.x || m_ptFoot.y != ptFoot.y) {
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m_ptHead = ptHead;
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m_ptFoot = ptFoot;
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m_bFlash = TRUE;
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Move(m_rcInvalid, FALSE, TRUE);
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}
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} else {
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m_ptHead = ptHead;
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m_ptFoot = ptFoot;
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EndTimer();
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BeginTimer(PWL_CARET_FLASHINTERVAL);
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CPWL_Wnd::SetVisible(TRUE);
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m_bFlash = TRUE;
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Move(m_rcInvalid, FALSE, TRUE);
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}
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} else {
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m_ptHead = CFX_FloatPoint(0, 0);
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m_ptFoot = CFX_FloatPoint(0, 0);
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m_bFlash = FALSE;
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if (IsVisible()) {
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EndTimer();
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CPWL_Wnd::SetVisible(FALSE);
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}
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}
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}
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void CPWL_Caret::InvalidateRect(CFX_FloatRect* pRect) {
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if (pRect) {
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CFX_FloatRect rcRefresh = CPWL_Utils::InflateRect(*pRect, 0.5f);
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rcRefresh.top += 1;
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rcRefresh.bottom -= 1;
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CPWL_Wnd::InvalidateRect(&rcRefresh);
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} else {
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CPWL_Wnd::InvalidateRect(pRect);
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}
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}
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