Display content of the annotation when mouse hover.

Each annotation has its contents, and users should be able to see the
contents. In this patch, PDFium creates a Popup annotation for each
annotation and stores the author and the content. When a user mouse
hover on the annotation, PDFium draws the corresponding Popup annotation
and displays the content.

Also, roll DEPS for testing/corpus to 5867fa6.

BUG=62625

Review-Url: https://codereview.chromium.org/2273893002

1 files changed, 219 insertions, 0 deletions

diff --git a/fpdfsdk/cpdfsdk_baannothandler.cpp b/fpdfsdk/cpdfsdk_baannothandler.cpp
new file mode 100644
index 0000000000..2fe3623099
--- /dev/null
+++ b/fpdfsdk/cpdfsdk_baannothandler.cpp
@@ -0,0 +1,219 @@
+// Copyright 2016 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/cpdfsdk_baannothandler.h"
+
+#include <memory>
+#include <vector>
+
+#include "core/fpdfapi/fpdf_page/include/cpdf_page.h"
+#include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
+#include "core/fpdfdoc/include/cpdf_interform.h"
+#include "fpdfsdk/formfiller/cffl_formfiller.h"
+#include "fpdfsdk/include/cpdfsdk_annot.h"
+#include "fpdfsdk/include/cpdfsdk_baannot.h"
+#include "fpdfsdk/include/fsdk_mgr.h"
+
+#ifdef PDF_ENABLE_XFA
+#include "fpdfsdk/fpdfxfa/include/fpdfxfa_doc.h"
+#endif  // PDF_ENABLE_XFA
+
+namespace {
+
+void UpdateAnnotRects(CPDFSDK_PageView* pPageView, CPDFSDK_BAAnnot* pBAAnnot) {
+  std::vector<CFX_FloatRect> rects;
+  rects.push_back(pBAAnnot->GetRect());
+  if (CPDF_Annot* pPopupAnnot = pBAAnnot->GetPDFPopupAnnot())
+    rects.push_back(pPopupAnnot->GetRect());
+  pPageView->UpdateRects(rects);
+}
+
+}  // namespace
+
+CPDFSDK_BAAnnotHandler::CPDFSDK_BAAnnotHandler() {}
+
+CPDFSDK_BAAnnotHandler::~CPDFSDK_BAAnnotHandler() {}
+
+CFX_ByteString CPDFSDK_BAAnnotHandler::GetType() {
+  return CFX_ByteString("");
+}
+
+FX_BOOL CPDFSDK_BAAnnotHandler::CanAnswer(CPDFSDK_Annot* pAnnot) {
+  return FALSE;
+}
+
+CPDFSDK_Annot* CPDFSDK_BAAnnotHandler::NewAnnot(CPDF_Annot* pAnnot,
+                                                CPDFSDK_PageView* pPage) {
+  return new CPDFSDK_BAAnnot(pAnnot, pPage);
+}
+
+#ifdef PDF_ENABLE_XFA
+CPDFSDK_Annot* CPDFSDK_BAAnnotHandler::NewAnnot(CXFA_FFWidget* hWidget,
+                                                CPDFSDK_PageView* pPage) {
+  return nullptr;
+}
+#endif  // PDF_ENABLE_XFA
+
+void CPDFSDK_BAAnnotHandler::ReleaseAnnot(CPDFSDK_Annot* pAnnot) {
+  delete pAnnot;
+}
+
+void CPDFSDK_BAAnnotHandler::DeleteAnnot(CPDFSDK_Annot* pAnnot) {}
+
+void CPDFSDK_BAAnnotHandler::OnDraw(CPDFSDK_PageView* pPageView,
+                                    CPDFSDK_Annot* pAnnot,
+                                    CFX_RenderDevice* pDevice,
+                                    CFX_Matrix* pUser2Device,
+                                    uint32_t dwFlags) {
+#ifdef PDF_ENABLE_XFA
+  if (pAnnot->IsXFAField())
+    return;
+#endif  // PDF_ENABLE_XFA
+  static_cast<CPDFSDK_BAAnnot*>(pAnnot)->DrawAppearance(
+      pDevice, pUser2Device, CPDF_Annot::Normal, nullptr);
+}
+
+void CPDFSDK_BAAnnotHandler::OnDrawSleep(CPDFSDK_PageView* pPageView,
+                                         CPDFSDK_Annot* pAnnot,
+                                         CFX_RenderDevice* pDevice,
+                                         CFX_Matrix* pUser2Device,
+                                         const CFX_FloatRect& rcWindow,
+                                         uint32_t dwFlags) {}
+
+void CPDFSDK_BAAnnotHandler::OnDelete(CPDFSDK_Annot* pAnnot) {}
+
+void CPDFSDK_BAAnnotHandler::OnRelease(CPDFSDK_Annot* pAnnot) {}
+
+void CPDFSDK_BAAnnotHandler::OnMouseEnter(CPDFSDK_PageView* pPageView,
+                                          CPDFSDK_Annot* pAnnot,
+                                          uint32_t nFlag) {
+  CPDFSDK_BAAnnot* pBAAnnot = static_cast<CPDFSDK_BAAnnot*>(pAnnot);
+  pBAAnnot->SetOpenState(true);
+  UpdateAnnotRects(pPageView, pBAAnnot);
+}
+
+void CPDFSDK_BAAnnotHandler::OnMouseExit(CPDFSDK_PageView* pPageView,
+                                         CPDFSDK_Annot* pAnnot,
+                                         uint32_t nFlag) {
+  CPDFSDK_BAAnnot* pBAAnnot = static_cast<CPDFSDK_BAAnnot*>(pAnnot);
+  pBAAnnot->SetOpenState(false);
+  UpdateAnnotRects(pPageView, pBAAnnot);
+}
+
+FX_BOOL CPDFSDK_BAAnnotHandler::OnLButtonDown(CPDFSDK_PageView* pPageView,
+                                              CPDFSDK_Annot* pAnnot,
+                                              uint32_t nFlags,
+                                              const CFX_FloatPoint& point) {
+  return FALSE;
+}
+
+FX_BOOL CPDFSDK_BAAnnotHandler::OnLButtonUp(CPDFSDK_PageView* pPageView,
+                                            CPDFSDK_Annot* pAnnot,
+                                            uint32_t nFlags,
+                                            const CFX_FloatPoint& point) {
+  return FALSE;
+}
+
+FX_BOOL CPDFSDK_BAAnnotHandler::OnLButtonDblClk(CPDFSDK_PageView* pPageView,
+                                                CPDFSDK_Annot* pAnnot,
+                                                uint32_t nFlags,
+                                                const CFX_FloatPoint& point) {
+  return FALSE;
+}
+
+FX_BOOL CPDFSDK_BAAnnotHandler::OnMouseMove(CPDFSDK_PageView* pPageView,
+                                            CPDFSDK_Annot* pAnnot,
+                                            uint32_t nFlags,
+                                            const CFX_FloatPoint& point) {
+  return FALSE;
+}
+
+FX_BOOL CPDFSDK_BAAnnotHandler::OnMouseWheel(CPDFSDK_PageView* pPageView,
+                                             CPDFSDK_Annot* pAnnot,
+                                             uint32_t nFlags,
+                                             short zDelta,
+                                             const CFX_FloatPoint& point) {
+  return FALSE;
+}
+
+FX_BOOL CPDFSDK_BAAnnotHandler::OnRButtonDown(CPDFSDK_PageView* pPageView,
+                                              CPDFSDK_Annot* pAnnot,
+                                              uint32_t nFlags,
+                                              const CFX_FloatPoint& point) {
+  return FALSE;
+}
+
+FX_BOOL CPDFSDK_BAAnnotHandler::OnRButtonUp(CPDFSDK_PageView* pPageView,
+                                            CPDFSDK_Annot* pAnnot,
+                                            uint32_t nFlags,
+                                            const CFX_FloatPoint& point) {
+  return FALSE;
+}
+
+FX_BOOL CPDFSDK_BAAnnotHandler::OnRButtonDblClk(CPDFSDK_PageView* pPageView,
+                                                CPDFSDK_Annot* pAnnot,
+                                                uint32_t nFlags,
+                                                const CFX_FloatPoint& point) {
+  return FALSE;
+}
+
+FX_BOOL CPDFSDK_BAAnnotHandler::OnChar(CPDFSDK_Annot* pAnnot,
+                                       uint32_t nChar,
+                                       uint32_t nFlags) {
+  return FALSE;
+}
+
+FX_BOOL CPDFSDK_BAAnnotHandler::OnKeyDown(CPDFSDK_Annot* pAnnot,
+                                          int nKeyCode,
+                                          int nFlag) {
+  return FALSE;
+}
+
+FX_BOOL CPDFSDK_BAAnnotHandler::OnKeyUp(CPDFSDK_Annot* pAnnot,
+                                        int nKeyCode,
+                                        int nFlag) {
+  return FALSE;
+}
+
+void CPDFSDK_BAAnnotHandler::OnDeSelected(CPDFSDK_Annot* pAnnot) {}
+
+void CPDFSDK_BAAnnotHandler::OnSelected(CPDFSDK_Annot* pAnnot) {}
+
+void CPDFSDK_BAAnnotHandler::OnCreate(CPDFSDK_Annot* pAnnot) {}
+
+void CPDFSDK_BAAnnotHandler::OnLoad(CPDFSDK_Annot* pAnnot) {}
+
+FX_BOOL CPDFSDK_BAAnnotHandler::OnSetFocus(CPDFSDK_Annot* pAnnot,
+                                           uint32_t nFlag) {
+  return FALSE;
+}
+
+FX_BOOL CPDFSDK_BAAnnotHandler::OnKillFocus(CPDFSDK_Annot* pAnnot,
+                                            uint32_t nFlag) {
+  return FALSE;
+}
+
+#ifdef PDF_ENABLE_XFA
+FX_BOOL CPDFSDK_BAAnnotHandler::OnXFAChangedFocus(CPDFSDK_Annot* pOldAnnot,
+                                                  CPDFSDK_Annot* pNewAnnot) {
+  return TRUE;
+}
+#endif  // PDF_ENABLE_XFA
+
+CFX_FloatRect CPDFSDK_BAAnnotHandler::GetViewBBox(CPDFSDK_PageView* pPageView,
+                                                  CPDFSDK_Annot* pAnnot) {
+  return pAnnot->GetRect();
+}
+
+FX_BOOL CPDFSDK_BAAnnotHandler::HitTest(CPDFSDK_PageView* pPageView,
+                                        CPDFSDK_Annot* pAnnot,
+                                        const CFX_FloatPoint& point) {
+  ASSERT(pPageView);
+  ASSERT(pAnnot);
+
+  CFX_FloatRect rect = GetViewBBox(pPageView, pAnnot);
+  return rect.Contains(point.x, point.y);
+}