Unifying NativeMetafile class interface (as much as possible) for Linux, Mac, Win

printing/emf_win.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "printing/emf_win.h"
 
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/scoped_ptr.h"
@@ skipping 32 matching lines @@
     ExtEscape(dc, escape, size, reinterpret_cast<LPCSTR>(bits),
               sizeof(supported), reinterpret_cast<LPSTR>(&supported));
   }
   return !!supported;
 }
 
 Emf::Emf() : emf_(NULL), hdc_(NULL) {
 }
 
 Emf::~Emf() {
-  CloseEmf();
+  Close();
   DCHECK(!emf_ && !hdc_);
 }
 
 bool Emf::Init(const void* src_buffer, uint32 src_buffer_size) {
   DCHECK(!emf_ && !hdc_);
   emf_ = SetEnhMetaFileBits(src_buffer_size,
                             reinterpret_cast<const BYTE*>(src_buffer));
   return emf_ != NULL;
 }
 
 bool Emf::CreateDc(HDC sibling, const RECT* rect) {
   DCHECK(!emf_ && !hdc_);
   hdc_ = CreateEnhMetaFile(sibling, NULL, rect, NULL);
   DCHECK(hdc_);
   return hdc_ != NULL;
 }
 
-bool Emf::CreateFileBackedDc(HDC sibling, const RECT* rect,
+bool Emf::CreateFileBackedDc(HDC sibling,
+                             const RECT* rect,
                              const FilePath& path) {
   DCHECK(!emf_ && !hdc_);
   DCHECK(!path.empty());
   hdc_ = CreateEnhMetaFile(sibling, path.value().c_str(), rect, NULL);
   DCHECK(hdc_);
   return hdc_ != NULL;
 }
 
 bool Emf::CreateFromFile(const FilePath& metafile_path) {
   DCHECK(!emf_ && !hdc_);
   emf_ = GetEnhMetaFile(metafile_path.value().c_str());
   DCHECK(emf_);
   return emf_ != NULL;
 }
 
 
 bool Emf::CloseDc() {
   DCHECK(!emf_ && hdc_);
   emf_ = CloseEnhMetaFile(hdc_);
   DCHECK(emf_);
   hdc_ = NULL;
   return emf_ != NULL;
 }
 
-void Emf::CloseEmf() {
+void Emf::Close() {
   DCHECK(!hdc_);
   if (emf_) {
     DeleteEnhMetaFile(emf_);
     emf_ = NULL;
   }
 }
 
 bool Emf::Playback(HDC hdc, const RECT* rect) const {
   DCHECK(emf_ && !hdc_);
   RECT bounds;
   if (!rect) {
     // Get the natural bounds of the EMF buffer.
-    bounds = GetBounds().ToRECT();
+    bounds = GetPageBounds().ToRECT();
     rect = &bounds;
   }
   return PlayEnhMetaFile(hdc, emf_, rect) != 0;
 }
 
 bool Emf::SafePlayback(HDC context) const {
   DCHECK(emf_ && !hdc_);
   XFORM base_matrix;
   if (!GetWorldTransform(context, &base_matrix)) {
     NOTREACHED();
     return false;
   }
   return EnumEnhMetaFile(context,
                          emf_,
                          &Emf::SafePlaybackProc,
                          reinterpret_cast<void*>(&base_matrix),
-                         &GetBounds().ToRECT()) != 0;
+                         &GetPageBounds().ToRECT()) != 0;
 }
 
-gfx::Rect Emf::GetBounds() const {
+gfx::Rect Emf::GetPageBounds() const {
+  return GetPageBounds(1);
+}
+
+gfx::Rect Emf::GetPageBounds(unsigned int page_number) const {
   DCHECK(emf_ && !hdc_);
   ENHMETAHEADER header;
   if (GetEnhMetaFileHeader(emf_, sizeof(header), &header) != sizeof(header)) {
     NOTREACHED();
     return gfx::Rect();
   }
   if (header.rclBounds.left == 0 &&
       header.rclBounds.top == 0 &&
       header.rclBounds.right == -1 &&
       header.rclBounds.bottom == -1) {
@@ skipping 26 matching lines @@
   uint32 size = GetDataSize();
   if (!size)
     return false;
 
   buffer->resize(size);
   if (!GetData(&buffer->front(), size))
     return false;
   return true;
 }
 
-bool Emf::SaveTo(const std::wstring& filename) const {
-  HANDLE file = CreateFile(filename.c_str(), GENERIC_WRITE,
+bool Emf::SaveTo(const FilePath& file_path) const {
+  HANDLE file = CreateFile(file_path.value().c_str(), GENERIC_WRITE,
                            FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
                            CREATE_ALWAYS, 0, NULL);
   if (file == INVALID_HANDLE_VALUE)
     return false;
 
   bool success = false;
   std::vector<uint8> buffer;
   if (GetData(&buffer)) {
     DWORD written = 0;
     if (WriteFile(file, &*buffer.begin(), static_cast<DWORD>(buffer.size()),
@@ skipping 223 matching lines @@
 
 bool Emf::StartPage() {
   DCHECK(hdc_);
   if (!hdc_)
     return false;
   PageBreakRecord record(PageBreakRecord::START_PAGE);
   return !!GdiComment(hdc_, sizeof(record),
                       reinterpret_cast<const BYTE *>(&record));
 }
 
-bool Emf::EndPage() {
+bool Emf::FinishPage() {
   DCHECK(hdc_);
   if (!hdc_)
     return false;
   PageBreakRecord record(PageBreakRecord::END_PAGE);
   return !!GdiComment(hdc_, sizeof(record),
                       reinterpret_cast<const BYTE *>(&record));
 }
 
 
 Emf::Enumerator::Enumerator(const Emf& emf, HDC context, const RECT* rect) {
@@ skipping 35 matching lines @@
   } else {
     DCHECK_EQ(emf.context_.handle_table, handle_table);
     DCHECK_EQ(emf.context_.objects_count, objects_count);
     DCHECK_EQ(emf.context_.hdc, hdc);
   }
   emf.items_.push_back(Record(&emf.context_, record));
   return 1;
 }
 
 }  // namespace printing