Make Metafile::StartPageForVectorCanvas take the page number as an argument.

This will let us add pages to a metafile out of order for print preview.
Also, make PdfMetafileSkia::GetMetafileForCurrentPage use draft mode, now that it's available.

BUG=NONE
TEST=NONE


Review URL: http://codereview.chromium.org/7481019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@93763 0039d316-1c4b-4281-b951-d872f2087c98

9 files changed, 30 insertions, 25 deletions

diff --git a/printing/emf_win.cc b/printing/emf_win.cc
index 4cb8530..920d64f 100644
--- a/printing/emf_win.cc
+++ b/printing/emf_win.cc
@@ -404,8 +404,9 @@ bool Emf::Record::SafePlayback(const XFORM* base_matrix) const {
 }
 
 SkDevice* Emf::StartPageForVectorCanvas(
-    const gfx::Size& page_size, const gfx::Rect& content_area,
+    int page_number, const gfx::Size& page_size, const gfx::Rect& content_area,
     const float& scale_factor) {
+  DCHECK(page_number == page_count_);
   if (!StartPage(page_size, content_area, scale_factor))
     return NULL;
 
diff --git a/printing/emf_win.h b/printing/emf_win.h
index f7e0ed5..a4584c9 100644
--- a/printing/emf_win.h
+++ b/printing/emf_win.h
@@ -46,8 +46,8 @@ class Emf : public Metafile {
   virtual bool InitFromData(const void* src_buffer, uint32 src_buffer_size);
 
   virtual SkDevice* StartPageForVectorCanvas(
-      const gfx::Size& page_size, const gfx::Rect& content_area,
-      const float& scale_factor);
+      int page_number, const gfx::Size& page_size,
+      const gfx::Rect& content_area, const float& scale_factor);
   // Inserts a custom GDICOMMENT records indicating StartPage/EndPage calls
   // (since StartPage and EndPage do not work in a metafile DC). Only valid
   // when hdc_ is non-NULL. |page_size|, |content_area|, and |scale_factor| are
diff --git a/printing/metafile.h b/printing/metafile.h
index 84c0556..dbb838c 100644
--- a/printing/metafile.h
+++ b/printing/metafile.h
@@ -53,8 +53,9 @@ class Metafile {
 
   // This method calls StartPage and then returns an appropriate
   // VectorPlatformDevice implementation bound to the context created by
-  // StartPage or NULL on error.
+  // StartPage or NULL on error. |page_number| is zero based.
   virtual SkDevice* StartPageForVectorCanvas(
+      int page_number,
       const gfx::Size& page_size,
       const gfx::Rect& content_area,
       const float& scale_factor) = 0;
diff --git a/printing/pdf_metafile_cairo_linux.cc b/printing/pdf_metafile_cairo_linux.cc
index af2aa5c..581b158 100644
--- a/printing/pdf_metafile_cairo_linux.cc
+++ b/printing/pdf_metafile_cairo_linux.cc
@@ -119,8 +119,8 @@ bool PdfMetafileCairo::InitFromData(const void* src_buffer,
 }
 
 SkDevice* PdfMetafileCairo::StartPageForVectorCanvas(
-    const gfx::Size& page_size, const gfx::Rect& content_area,
-    const float& scale_factor) {
+    int /*page_number*/, const gfx::Size& page_size,
+    const gfx::Rect& content_area, const float& scale_factor) {
   if (!StartPage(page_size, content_area, scale_factor))
     return NULL;
 
diff --git a/printing/pdf_metafile_cairo_linux.h b/printing/pdf_metafile_cairo_linux.h
index 6f07ae0..62fd814 100644
--- a/printing/pdf_metafile_cairo_linux.h
+++ b/printing/pdf_metafile_cairo_linux.h
@@ -37,8 +37,8 @@ class PdfMetafileCairo : public Metafile {
   virtual bool InitFromData(const void* src_buffer, uint32 src_buffer_size);
 
   virtual SkDevice* StartPageForVectorCanvas(
-      const gfx::Size& page_size, const gfx::Rect& content_area,
-      const float& scale_factor);
+      int page_number, const gfx::Size& page_size,
+      const gfx::Rect& content_area, const float& scale_factor);
 
   virtual bool StartPage(const gfx::Size& page_size,
                          const gfx::Rect& content_area,
diff --git a/printing/pdf_metafile_cg_mac.cc b/printing/pdf_metafile_cg_mac.cc
index 994f58f..6206552 100644
--- a/printing/pdf_metafile_cg_mac.cc
+++ b/printing/pdf_metafile_cg_mac.cc
@@ -107,7 +107,7 @@ bool PdfMetafileCg::InitFromData(const void* src_buffer,
 }
 
 SkDevice* PdfMetafileCg::StartPageForVectorCanvas(
-    const gfx::Size& page_size, const gfx::Rect& content_area,
+    int page_number, const gfx::Size& page_size, const gfx::Rect& content_area,
     const float& scale_factor) {
   NOTIMPLEMENTED();
   return NULL;
diff --git a/printing/pdf_metafile_cg_mac.h b/printing/pdf_metafile_cg_mac.h
index 5a7f56d..488abe8 100644
--- a/printing/pdf_metafile_cg_mac.h
+++ b/printing/pdf_metafile_cg_mac.h
@@ -36,8 +36,8 @@ class PdfMetafileCg : public Metafile, public base::ThreadChecker {
 
   // Not implemented on mac.
   virtual SkDevice* StartPageForVectorCanvas(
-      const gfx::Size& page_size, const gfx::Rect& content_area,
-      const float& scale_factor);
+      int page_number, const gfx::Size& page_size,
+      const gfx::Rect& content_area, const float& scale_factor);
   virtual bool StartPage(const gfx::Size& page_size,
                          const gfx::Rect& content_area,
                          const float& scale_factor);
diff --git a/printing/pdf_metafile_skia.cc b/printing/pdf_metafile_skia.cc
index 1f08ad0..638fa7b 100644
--- a/printing/pdf_metafile_skia.cc
+++ b/printing/pdf_metafile_skia.cc
@@ -49,10 +49,11 @@ bool PdfMetafileSkia::InitFromData(const void* src_buffer,
 }
 
 SkDevice* PdfMetafileSkia::StartPageForVectorCanvas(
-    const gfx::Size& page_size, const gfx::Rect& content_area,
+    int page_number, const gfx::Size& page_size, const gfx::Rect& content_area,
     const float& scale_factor) {
-  DCHECK (!page_outstanding_);
-  page_outstanding_ = true;
+  DCHECK_EQ(outstanding_page_number_, kNoOutstandingPage);
+  DCHECK_GE(page_number, 0);
+  outstanding_page_number_ = page_number;
 
   // Adjust for the margins and apply the scale factor.
   SkMatrix transform;
@@ -83,9 +84,11 @@ bool PdfMetafileSkia::StartPage(const gfx::Size& page_size,
 
 bool PdfMetafileSkia::FinishPage() {
   DCHECK(data_->current_page_.get());
+  DCHECK_GE(outstanding_page_number_, 0);
 
-  data_->pdf_doc_.appendPage(data_->current_page_.get());
-  page_outstanding_ = false;
+  data_->pdf_doc_.setPage(outstanding_page_number_ + 1,
+                          data_->current_page_.get());
+  outstanding_page_number_ = kNoOutstandingPage;
   return true;
 }
 
@@ -94,7 +97,7 @@ bool PdfMetafileSkia::FinishDocument() {
   if (data_->pdf_stream_.getOffset())
     return true;
 
-  if (page_outstanding_)
+  if (outstanding_page_number_ >= 0)
     FinishPage();
 
   data_->current_page_ = NULL;
@@ -236,11 +239,11 @@ bool PdfMetafileSkia::SaveToFD(const base::FileDescriptor& fd) const {
 
 PdfMetafileSkia::PdfMetafileSkia()
     : data_(new PdfMetafileSkiaData),
-      draft_(false),
-      page_outstanding_(false) {}
+      outstanding_page_number_(kNoOutstandingPage) {
+}
 
 PdfMetafileSkia* PdfMetafileSkia::GetMetafileForCurrentPage() {
-  SkPDFDocument pdf_doc;
+  SkPDFDocument pdf_doc(SkPDFDocument::kDraftMode_Flags);
   SkDynamicMemoryWStream pdf_stream;
   if (!pdf_doc.appendPage(data_->current_page_.get()))
     return NULL;
diff --git a/printing/pdf_metafile_skia.h b/printing/pdf_metafile_skia.h
index 5d6d448..4ce5337 100644
--- a/printing/pdf_metafile_skia.h
+++ b/printing/pdf_metafile_skia.h
@@ -30,6 +30,7 @@ class PdfMetafileSkia : public Metafile {
   virtual bool InitFromData(const void* src_buffer, uint32 src_buffer_size);
 
   virtual SkDevice* StartPageForVectorCanvas(
+      int page_number,
       const gfx::Size& page_size,
       const gfx::Rect& content_area,
       const float& scale_factor);
@@ -72,13 +73,12 @@ class PdfMetafileSkia : public Metafile {
   PdfMetafileSkia* GetMetafileForCurrentPage();
 
  private:
-  scoped_ptr<PdfMetafileSkiaData> data_;
+  static const int kNoOutstandingPage = -1;
 
-  // True when a draft version of metafile is requested.
-  mutable bool draft_;
+  scoped_ptr<PdfMetafileSkiaData> data_;
 
-  // True when finish page is outstanding for current page.
-  bool page_outstanding_;
+  // Page number of the outstanding page, or kNoOutstandingPage.
+  int outstanding_page_number_;
 
   DISALLOW_COPY_AND_ASSIGN(PdfMetafileSkia);
 };