1 files changed, 160 insertions, 0 deletions
diff --git a/fpdfsdk/pdfwindow/PWL_Caret.cpp b/fpdfsdk/pdfwindow/PWL_Caret.cpp
new file mode 100644
index 0000000000..320b2bf62f
--- /dev/null
+++ b/fpdfsdk/pdfwindow/PWL_Caret.cpp
@@ -0,0 +1,160 @@
+// 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/include/pdfwindow/PWL_Caret.h"
+#include "fpdfsdk/include/pdfwindow/PWL_Utils.h"
+#include "fpdfsdk/include/pdfwindow/PWL_Wnd.h"
+
+#define PWL_CARET_FLASHINTERVAL 500
+
+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, CFX_FloatPoint(0.0f, 0.0f));
+}
+
+void CPWL_Caret::DrawThisAppearance(CFX_RenderDevice* pDevice,
+                                    CFX_Matrix* pUser2Device) {
+  if (IsVisible() && m_bFlash) {
+    CFX_FloatRect rcRect = GetCaretRect();
+    CFX_FloatRect 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 CFX_FloatPoint& ptOffset) {
+  if (IsVisible() && m_bFlash) {
+    CFX_ByteTextBuf sCaret;
+
+    CFX_FloatRect rcRect = GetCaretRect();
+    CFX_FloatRect 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 CFX_FloatPoint& 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();
+  }
+}
+
+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(FX_BOOL bVisible,
+                          const CFX_FloatPoint& ptHead,
+                          const CFX_FloatPoint& 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) {
+        m_ptHead = ptHead;
+        m_ptFoot = ptFoot;
+
+        m_bFlash = TRUE;
+        Move(m_rcInvalid, FALSE, TRUE);
+      }
+    } else {
+      m_ptHead = ptHead;
+      m_ptFoot = ptFoot;
+
+      EndTimer();
+      BeginTimer(PWL_CARET_FLASHINTERVAL);
+
+      CPWL_Wnd::SetVisible(TRUE);
+      m_bFlash = TRUE;
+
+      Move(m_rcInvalid, FALSE, TRUE);
+    }
+  } else {
+    m_ptHead = CFX_FloatPoint(0, 0);
+    m_ptFoot = CFX_FloatPoint(0, 0);
+
+    m_bFlash = FALSE;
+    if (IsVisible()) {
+      EndTimer();
+      CPWL_Wnd::SetVisible(FALSE);
+    }
+  }
+}
+
+void CPWL_Caret::InvalidateRect(CFX_FloatRect* pRect) {
+  if (pRect) {
+    CFX_FloatRect rcRefresh = CPWL_Utils::InflateRect(*pRect, 0.5f);
+    rcRefresh.top += 1;
+    rcRefresh.bottom -= 1;
+
+    CPWL_Wnd::InvalidateRect(&rcRefresh);
+  } else {
+    CPWL_Wnd::InvalidateRect(pRect);
+  }
+}