Original change by Min-Yu Huang <minyu.huang@gmail.com> in

http://codereview.chromium.org/160347

This is the very preliminary implementation to support printing on Linux and it
has not been finished yet. For each page to be printed, we convert rendering
actions on canvas into cairo APIs and generate a PS/PDF file.

chrome/chrome.gyp:
  Include our newly added and renamed files.

chrome/browser/browser.h:
chrome/browser/browser.cc:
  Allow the user print the web page by hitting ctrl-p.

chrome/browser/gtk/standard_menus.cc:
  Show "Print" in the menu.

chrome/renderer/print_web_view_helper.cc:
chrome/renderer/print_web_view_helper.h:
chrome/renderer/print_web_view_helper_mac.cc
chrome/renderer/print_web_view_helper_win.cc
  Move the class PrepareFrameAndViewForPrint to the header file and move
platform dependent parts to their corresponding files.

chrome/renderer/print_web_view_helper_linux.cc:
  Hard-coded parameters for printing. Only print the first page now.

skia/ext/vector_canvas.cc:
skia/ext/vector_canvas.h:
skia/ext/vector_canvas_linux.cc:
skia/ext/vector_canvas_win.cc:
  Move platform dependent parts to their corresponding files.

skia/ext/vector_platform_device.h:
skia/ext/vector_platform_device_linux.cc:
skia/ext/vector_platform_device_linux.h
  We translate skia APIs into Cairo APIs here. A PDF file is also created and
saved to the disk at this moment for testing purpose (you have to run chrome
without the sandbox to save the file). There are still lots of bugs.

skia/skia.gyp:
  Include our newly added files when compiling skia package on Linux.

BUG=9847

Review URL: http://codereview.chromium.org/160673


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@22522 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 5 insertions, 194 deletions

diff --git a/chrome/renderer/print_web_view_helper_win.cc b/chrome/renderer/print_web_view_helper_win.cc
index 1e9a0fe..e4e372a 100644
--- a/chrome/renderer/print_web_view_helper_win.cc
+++ b/chrome/renderer/print_web_view_helper_win.cc
@@ -5,105 +5,29 @@
 #include "chrome/renderer/print_web_view_helper.h"
 
 #include "app/l10n_util.h"
-#include "base/logging.h"
 #include "base/gfx/size.h"
+#include "base/logging.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/renderer/render_view.h"
 #include "grit/generated_resources.h"
 #include "printing/native_metafile.h"
-#include "printing/units.h"
 #include "webkit/api/public/WebConsoleMessage.h"
-#include "webkit/api/public/WebRect.h"
-#include "webkit/api/public/WebScreenInfo.h"
-#include "webkit/api/public/WebSize.h"
-#include "webkit/api/public/WebURL.h"
-#include "webkit/api/public/WebURLRequest.h"
 #include "webkit/glue/webframe.h"
 
-#if defined(OS_WIN)
-#include "skia/ext/vector_canvas.h"
-#endif
-
 using WebKit::WebConsoleMessage;
-using WebKit::WebRect;
-using WebKit::WebScreenInfo;
 using WebKit::WebString;
-using WebKit::WebURLRequest;
-
-namespace {
-
-const int kMinSecondsToIgnoreJavascriptInitiatedPrint = 2;
-const int kMaxSecondsToIgnoreJavascriptInitiatedPrint = 2 * 60;  // 2 Minutes.
-
-// Class that calls the Begin and End print functions on the frame and changes
-// the size of the view temporarily to support full page printing..
-// Do not serve any events in the time between construction and destruction of
-// this class because it will cause flicker.
-class PrepareFrameAndViewForPrint {
- public:
-  PrepareFrameAndViewForPrint(const ViewMsg_Print_Params& print_params,
-                              WebFrame* frame,
-                              WebView* web_view)
-      : frame_(frame),
-        web_view_(web_view),
-        expected_pages_count_(0) {
-    print_canvas_size_.set_width(
-        printing::ConvertUnit(print_params.printable_size.width(),
-        static_cast<int>(print_params.dpi),
-        print_params.desired_dpi));
-    print_canvas_size_.set_height(
-        printing::ConvertUnit(print_params.printable_size.height(),
-        static_cast<int>(print_params.dpi),
-        print_params.desired_dpi));
-
-    // Layout page according to printer page size. Since WebKit shrinks the
-    // size of the page automatically (from 125% to 200%) we trick it to
-    // think the page is 125% larger so the size of the page is correct for
-    // minimum (default) scaling.
-    // This is important for sites that try to fill the page.
-    gfx::Size print_layout_size(print_canvas_size_);
-    print_layout_size.set_height(static_cast<int>(
-        static_cast<double>(print_layout_size.height()) * 1.25));
-
-    prev_view_size_ = web_view->size();
-
-    web_view->resize(print_layout_size);
-
-    expected_pages_count_ = frame->PrintBegin(print_canvas_size_);
-  }
-
-  int GetExpectedPageCount() const {
-    return expected_pages_count_;
-  }
 
-  gfx::Size GetPrintCanvasSize() const {
-    return print_canvas_size_;
-  }
-
-  ~PrepareFrameAndViewForPrint() {
-    frame_->PrintEnd();
-    web_view_->resize(prev_view_size_);
-  }
-
- private:
-  WebFrame* frame_;
-  WebView* web_view_;
-  gfx::Size print_canvas_size_;
-  gfx::Size prev_view_size_;
-  int expected_pages_count_;
-
-  DISALLOW_COPY_AND_ASSIGN(PrepareFrameAndViewForPrint);
-};
-
-}  // namespace
+#include "skia/ext/vector_canvas.h"
 
 void PrintWebViewHelper::Print(WebFrame* frame, bool script_initiated) {
-#if defined(OS_WIN)
+  const int kMinSecondsToIgnoreJavascriptInitiatedPrint = 2;
+  const int kMaxSecondsToIgnoreJavascriptInitiatedPrint = 2 * 60;  // 2 Minutes.
 
   // If still not finished with earlier print request simply ignore.
   if (IsPrinting())
     return;
 
+  // TODO(maruel): Move this out of platform specific code.
   // Check if there is script repeatedly trying to print and ignore it if too
   // frequent.  We use exponential wait time so for a page that calls print() in
   // a loop the user will need to cancel the print dialog after 2 seconds, 4
@@ -215,87 +139,11 @@ void PrintWebViewHelper::Print(WebFrame* frame, bool script_initiated) {
     last_cancelled_script_print_ = base::Time::Now();
   }
   DidFinishPrinting(user_cancelled_print);
-#else  // defined(OS_WIN)
-  // TODO(port): print not implemented
-  NOTIMPLEMENTED();
-#endif
-}
-
-void PrintWebViewHelper::DidFinishPrinting(bool success) {
-  if (!success) {
-    WebView* web_view = print_web_view_.get();
-    if (!web_view)
-      web_view = render_view_->webview();
-
-    // TODO: Create an async alert (http://crbug.com/14918).
-    render_view_->RunJavaScriptAlert(web_view->GetMainFrame(),
-        l10n_util::GetString(IDS_PRINT_SPOOL_FAILED_ERROR_TEXT));
-  }
-
-  if (print_web_view_.get()) {
-    print_web_view_->close();
-    print_web_view_.release();  // Close deletes object.
-    print_pages_params_.reset();
-  }
-
-}
-
-bool PrintWebViewHelper::CopyAndPrint(const ViewMsg_PrintPages_Params& params,
-                                      WebFrame* web_frame) {
-  // Create a new WebView with the same settings as the current display one.
-  // Except that we disable javascript (don't want any active content running
-  // on the page).
-  WebPreferences prefs = web_frame->GetView()->GetPreferences();
-  prefs.javascript_enabled = false;
-  prefs.java_enabled = false;
-  print_web_view_.reset(WebView::Create(this, prefs));
-
-  print_pages_params_.reset(new ViewMsg_PrintPages_Params(params));
-  print_pages_params_->pages.clear();  // Print all pages of selection.
-
-  std::string html = web_frame->GetSelection(true);
-  std::string url_str = "data:text/html;charset=utf-8,";
-  url_str.append(html);
-  GURL url(url_str);
-
-  // When loading is done this will call DidStopLoading that will do the
-  // actual printing.
-  print_web_view_->GetMainFrame()->LoadRequest(WebURLRequest(url));
-
-  return true;
-}
-
-void PrintWebViewHelper::PrintPages(const ViewMsg_PrintPages_Params& params,
-                                    WebFrame* frame) {
-  PrepareFrameAndViewForPrint prep_frame_view(params.params,
-                                              frame,
-                                              frame->GetView());
-  int page_count = prep_frame_view.GetExpectedPageCount();
-
-  Send(new ViewHostMsg_DidGetPrintedPagesCount(routing_id(),
-                                               params.params.document_cookie,
-                                               page_count));
-  if (page_count) {
-    ViewMsg_PrintPage_Params page_params;
-    page_params.params = params.params;
-    if (params.pages.empty()) {
-      for (int i = 0; i < page_count; ++i) {
-        page_params.page_number = i;
-        PrintPage(page_params, prep_frame_view.GetPrintCanvasSize(), frame);
-      }
-    } else {
-      for (size_t i = 0; i < params.pages.size(); ++i) {
-        page_params.page_number = params.pages[i];
-        PrintPage(page_params, prep_frame_view.GetPrintCanvasSize(), frame);
-      }
-    }
-  }
 }
 
 void PrintWebViewHelper::PrintPage(const ViewMsg_PrintPage_Params& params,
                                 const gfx::Size& canvas_size,
                                 WebFrame* frame) {
-#if defined(OS_WIN)
   // Generate a memory-based metafile. It will use the current screen's DPI.
   printing::NativeMetafile metafile;
 
@@ -400,42 +248,5 @@ void PrintWebViewHelper::PrintPage(const ViewMsg_PrintPage_Params& params,
       &page_params.metafile_data_handle))) {
     Send(new ViewHostMsg_DidPrintPage(routing_id(), page_params));
   }
-#else  // defined(OS_WIN)
-  // TODO(port) implement printing
-  NOTIMPLEMENTED();
-#endif
-}
-
-bool PrintWebViewHelper::Send(IPC::Message* msg) {
-  return render_view_->Send(msg);
-}
-
-int32 PrintWebViewHelper::routing_id() {
-  return render_view_->routing_id();
-}
-
-WebRect PrintWebViewHelper::windowRect() {
-  NOTREACHED();
-  return WebRect();
 }
 
-WebRect PrintWebViewHelper::windowResizerRect() {
-  NOTREACHED();
-  return WebRect();
-}
-
-WebRect PrintWebViewHelper::rootWindowRect() {
-  NOTREACHED();
-  return WebRect();
-}
-
-WebScreenInfo PrintWebViewHelper::screenInfo() {
-  NOTREACHED();
-  return WebScreenInfo();
-}
-
-void PrintWebViewHelper::DidStopLoading(WebView* webview) {
-  DCHECK(print_pages_params_.get() != NULL);
-  DCHECK_EQ(webview, print_web_view_.get());
-  PrintPages(*print_pages_params_.get(), print_web_view_->GetMainFrame());
-}