1 files changed, 114 insertions, 0 deletions
diff --git a/fpdfsdk/pwl/cpwl_caret.cpp b/fpdfsdk/pwl/cpwl_caret.cpp
new file mode 100644
index 0000000000..d309d2743b
--- /dev/null
+++ b/fpdfsdk/pwl/cpwl_caret.cpp
@@ -0,0 +1,114 @@
+// 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() {}
+
+CFX_ByteString CPWL_Caret::GetClassName() const {
+  return "CPWL_Caret";
+}
+
+void CPWL_Caret::DrawThisAppearance(CFX_RenderDevice* pDevice,
+                                    CFX_Matrix* pUser2Device) {
+  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, pUser2Device, &gsd, 0, ArgbEncode(255, 0, 0, 0),
+                    FXFILL_ALTERNATE);
+}
+
+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(bool bVisible,
+                          const CFX_PointF& ptHead,
+                          const CFX_PointF& ptFoot) {
+  if (bVisible) {
+    if (IsVisible()) {
+      if (m_ptHead != ptHead || m_ptFoot != ptFoot) {
+        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_PointF();
+    m_ptFoot = CFX_PointF();
+    m_bFlash = false;
+    if (IsVisible()) {
+      EndTimer();
+      CPWL_Wnd::SetVisible(false);
+    }
+  }
+}
+
+void CPWL_Caret::InvalidateRect(CFX_FloatRect* pRect) {
+  if (pRect) {
+    CFX_FloatRect rcRefresh = *pRect;
+    if (!rcRefresh.IsEmpty()) {
+      rcRefresh.Inflate(0.5f, 0.5f);
+      rcRefresh.Normalize();
+    }
+    rcRefresh.top += 1;
+    rcRefresh.bottom -= 1;
+    CPWL_Wnd::InvalidateRect(&rcRefresh);
+  } else {
+    CPWL_Wnd::InvalidateRect(pRect);
+  }
+}