path: root/webkit/plugins/ppapi/ppb_flash_impl.cc

// Copyright (c) 2012 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 "webkit/plugins/ppapi/ppb_flash_impl.h"

#include <string>
#include <vector>

#include "base/time.h"
#include "base/utf_string_conversions.h"
#include "googleurl/src/gurl.h"
#include "ppapi/c/dev/ppb_font_dev.h"
#include "ppapi/c/private/ppb_flash.h"
#include "ppapi/shared_impl/file_path.h"
#include "ppapi/shared_impl/file_type_conversion.h"
#include "ppapi/shared_impl/time_conversion.h"
#include "ppapi/shared_impl/var.h"
#include "ppapi/thunk/enter.h"
#include "ppapi/thunk/ppb_file_ref_api.h"
#include "ppapi/thunk/ppb_image_data_api.h"
#include "ppapi/thunk/ppb_url_request_info_api.h"
#include "skia/ext/platform_canvas.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkMatrix.h"
#include "third_party/skia/include/core/SkPaint.h"
#include "third_party/skia/include/core/SkPoint.h"
#include "third_party/skia/include/core/SkTemplates.h"
#include "third_party/skia/include/core/SkTypeface.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebElement.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebPluginContainer.h"
#include "ui/gfx/rect.h"
#include "webkit/plugins/ppapi/common.h"
#include "webkit/plugins/ppapi/host_globals.h"
#include "webkit/plugins/ppapi/plugin_delegate.h"
#include "webkit/plugins/ppapi/plugin_module.h"
#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
#include "webkit/plugins/ppapi/ppb_file_ref_impl.h"
#include "webkit/plugins/ppapi/resource_helper.h"
#include "webkit/plugins/ppapi/ppb_image_data_impl.h"

using ppapi::PPTimeToTime;
using ppapi::StringVar;
using ppapi::TimeToPPTime;
using ppapi::thunk::EnterResource;
using ppapi::thunk::EnterResourceNoLock;
using ppapi::thunk::PPB_FileRef_API;
using ppapi::thunk::PPB_ImageData_API;
using ppapi::thunk::PPB_URLRequestInfo_API;

namespace webkit {
namespace ppapi {

PPB_Flash_Impl::PPB_Flash_Impl(PluginInstance* instance)
    : instance_(instance) {
}

PPB_Flash_Impl::~PPB_Flash_Impl() {
}

void PPB_Flash_Impl::SetInstanceAlwaysOnTop(PP_Instance instance,
                                            PP_Bool on_top) {
  instance_->set_always_on_top(PP_ToBool(on_top));
}

PP_Bool PPB_Flash_Impl::DrawGlyphs(PP_Instance instance,
                                   PP_Resource pp_image_data,
                                   const PP_FontDescription_Dev* font_desc,
                                   uint32_t color,
                                   const PP_Point* position,
                                   const PP_Rect* clip,
                                   const float transformation[3][3],
                                   PP_Bool allow_subpixel_aa,
                                   uint32_t glyph_count,
                                   const uint16_t glyph_indices[],
                                   const PP_Point glyph_advances[]) {
  EnterResourceNoLock<PPB_ImageData_API> enter(pp_image_data, true);
  if (enter.failed())
    return PP_FALSE;
  PPB_ImageData_Impl* image_resource =
      static_cast<PPB_ImageData_Impl*>(enter.object());

  ImageDataAutoMapper mapper(image_resource);
  if (!mapper.is_valid())
    return PP_FALSE;

  // Set up the typeface.
  StringVar* face_name = StringVar::FromPPVar(font_desc->face);
  if (!face_name)
    return PP_FALSE;
  int style = SkTypeface::kNormal;
  if (font_desc->weight >= PP_FONTWEIGHT_BOLD)
    style |= SkTypeface::kBold;
  if (font_desc->italic)
    style |= SkTypeface::kItalic;
  skia::RefPtr<SkTypeface> typeface = skia::AdoptRef(
      SkTypeface::CreateFromName(face_name->value().c_str(),
                                 static_cast<SkTypeface::Style>(style)));
  if (!typeface)
    return PP_FALSE;

  // Set up the canvas.
  SkCanvas* canvas = image_resource->GetPlatformCanvas();
  SkAutoCanvasRestore acr(canvas, true);

  // Clip is applied in pixels before the transform.
  SkRect clip_rect = { SkIntToScalar(clip->point.x),
                       SkIntToScalar(clip->point.y),
                       SkIntToScalar(clip->point.x + clip->size.width),
                       SkIntToScalar(clip->point.y + clip->size.height) };
  canvas->clipRect(clip_rect);

  // Convert & set the matrix.
  SkMatrix matrix;
  matrix.set(SkMatrix::kMScaleX, SkFloatToScalar(transformation[0][0]));
  matrix.set(SkMatrix::kMSkewX,  SkFloatToScalar(transformation[0][1]));
  matrix.set(SkMatrix::kMTransX, SkFloatToScalar(transformation[0][2]));
  matrix.set(SkMatrix::kMSkewY,  SkFloatToScalar(transformation[1][0]));
  matrix.set(SkMatrix::kMScaleY, SkFloatToScalar(transformation[1][1]));
  matrix.set(SkMatrix::kMTransY, SkFloatToScalar(transformation[1][2]));
  matrix.set(SkMatrix::kMPersp0, SkFloatToScalar(transformation[2][0]));
  matrix.set(SkMatrix::kMPersp1, SkFloatToScalar(transformation[2][1]));
  matrix.set(SkMatrix::kMPersp2, SkFloatToScalar(transformation[2][2]));
  canvas->concat(matrix);

  SkPaint paint;
  paint.setColor(color);
  paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
  paint.setAntiAlias(true);
  paint.setHinting(SkPaint::kFull_Hinting);
  paint.setTextSize(SkIntToScalar(font_desc->size));
  paint.setTypeface(typeface.get());  // Takes a ref and manages lifetime.
  if (allow_subpixel_aa) {
    paint.setSubpixelText(true);
    paint.setLCDRenderText(true);
  }

  SkScalar x = SkIntToScalar(position->x);
  SkScalar y = SkIntToScalar(position->y);

  // Build up the skia advances.
  if (glyph_count == 0)
    return PP_TRUE;
  std::vector<SkPoint> storage;
  storage.resize(glyph_count);
  SkPoint* sk_positions = &storage[0];
  for (uint32_t i = 0; i < glyph_count; i++) {
    sk_positions[i].set(x, y);
    x += SkFloatToScalar(glyph_advances[i].x);
    y += SkFloatToScalar(glyph_advances[i].y);
  }

  canvas->drawPosText(glyph_indices, glyph_count * 2, sk_positions, paint);

  return PP_TRUE;
}

PP_Var PPB_Flash_Impl::GetProxyForURL(PP_Instance instance,
                                      const char* url) {
  GURL gurl(url);
  if (!gurl.is_valid())
    return PP_MakeUndefined();

  std::string proxy_host = instance_->delegate()->ResolveProxy(gurl);
  if (proxy_host.empty())
    return PP_MakeUndefined();  // No proxy.
  return StringVar::StringToPPVar(proxy_host);
}

int32_t PPB_Flash_Impl::Navigate(PP_Instance instance,
                                 PP_Resource request_info,
                                 const char* target,
                                 PP_Bool from_user_action) {
  EnterResourceNoLock<PPB_URLRequestInfo_API> enter(request_info, true);
  if (enter.failed())
    return PP_ERROR_BADRESOURCE;
  return Navigate(instance, enter.object()->GetData(), target,
                  from_user_action);
}

int32_t PPB_Flash_Impl::Navigate(PP_Instance instance,
                                 const ::ppapi::URLRequestInfoData& data,
                                 const char* target,
                                 PP_Bool from_user_action) {
  if (!target)
    return PP_ERROR_BADARGUMENT;
  return instance_->Navigate(data, target, PP_ToBool(from_user_action));
}

double PPB_Flash_Impl::GetLocalTimeZoneOffset(PP_Instance instance,
                                              PP_Time t) {
  // Evil hack. The time code handles exact "0" values as special, and produces
  // a "null" Time object. This will represent some date hundreds of years ago
  // and will give us funny results at 1970 (there are some tests where this
  // comes up, but it shouldn't happen in real life). To work around this
  // special handling, we just need to give it some nonzero value.
  if (t == 0.0)
    t = 0.0000000001;

  // We can't do the conversion here because on Linux, the localtime calls
  // require filesystem access prohibited by the sandbox.
  return instance_->delegate()->GetLocalTimeZoneOffset(PPTimeToTime(t));
}

PP_Bool PPB_Flash_Impl::IsRectTopmost(PP_Instance instance,
                                      const PP_Rect* rect) {
  return PP_FromBool(instance_->IsRectTopmost(
      gfx::Rect(rect->point.x, rect->point.y,
                rect->size.width, rect->size.height)));
}

void PPB_Flash_Impl::UpdateActivity(PP_Instance pp_instance) {
  // Not supported in-process.
}

PP_Var PPB_Flash_Impl::GetSetting(PP_Instance instance,
                                  PP_FlashSetting setting) {
  switch(setting) {
    case PP_FLASHSETTING_LSORESTRICTIONS: {
      return PP_MakeInt32(
          instance_->delegate()->GetLocalDataRestrictions(
              instance_->container()->element().document().url(),
              instance_->plugin_url()));
    }
    default:
      // No other settings are supported in-process.
      return PP_MakeUndefined();
  }
}

PP_Bool PPB_Flash_Impl::SetCrashData(PP_Instance instance,
                                     PP_FlashCrashKey key,
                                     PP_Var value) {
  // Not implemented in process.
  return PP_FALSE;
}

bool PPB_Flash_Impl::CreateThreadAdapterForInstance(PP_Instance instance) {
  return false;  // No multithreaded access allowed.
}

void PPB_Flash_Impl::ClearThreadAdapterForInstance(PP_Instance instance) {
}

int32_t PPB_Flash_Impl::OpenFile(PP_Instance pp_instance,
                                 const char* path,
                                 int32_t mode,
                                 PP_FileHandle* file) {
  int flags = 0;
  if (!path ||
      !::ppapi::PepperFileOpenFlagsToPlatformFileFlags(mode, &flags) ||
      !file)
    return PP_ERROR_BADARGUMENT;

  PluginInstance* instance = HostGlobals::Get()->GetInstance(pp_instance);
  if (!instance)
    return PP_ERROR_FAILED;

  base::PlatformFile base_file;
  base::PlatformFileError result = instance->delegate()->OpenFile(
      ::ppapi::PepperFilePath::MakeModuleLocal(
          instance->module()->name(), path),
      flags,
      &base_file);
  *file = base_file;
  return ::ppapi::PlatformFileErrorToPepperError(result);
}

int32_t PPB_Flash_Impl::RenameFile(PP_Instance pp_instance,
                                   const char* path_from,
                                   const char* path_to) {
  if (!path_from || !path_to)
    return PP_ERROR_BADARGUMENT;

  PluginInstance* instance = HostGlobals::Get()->GetInstance(pp_instance);
  if (!instance)
    return PP_ERROR_FAILED;

  base::PlatformFileError result = instance->delegate()->RenameFile(
      ::ppapi::PepperFilePath::MakeModuleLocal(
          instance->module()->name(), path_from),
      ::ppapi::PepperFilePath::MakeModuleLocal(
          instance->module()->name(), path_to));
  return ::ppapi::PlatformFileErrorToPepperError(result);
}

int32_t PPB_Flash_Impl::DeleteFileOrDir(PP_Instance pp_instance,
                                        const char* path,
                                        PP_Bool recursive) {
  if (!path)
    return PP_ERROR_BADARGUMENT;

  PluginInstance* instance = HostGlobals::Get()->GetInstance(pp_instance);
  if (!instance)
    return PP_ERROR_FAILED;

  base::PlatformFileError result = instance->delegate()->DeleteFileOrDir(
      ::ppapi::PepperFilePath::MakeModuleLocal(
          instance->module()->name(), path),
      PPBoolToBool(recursive));
  return ::ppapi::PlatformFileErrorToPepperError(result);
}

int32_t PPB_Flash_Impl::CreateDir(PP_Instance pp_instance, const char* path) {
  if (!path)
    return PP_ERROR_BADARGUMENT;

  PluginInstance* instance = HostGlobals::Get()->GetInstance(pp_instance);
  if (!instance)
    return PP_ERROR_FAILED;

  base::PlatformFileError result = instance->delegate()->CreateDir(
      ::ppapi::PepperFilePath::MakeModuleLocal(
          instance->module()->name(), path));
  return ::ppapi::PlatformFileErrorToPepperError(result);
}

int32_t PPB_Flash_Impl::QueryFile(PP_Instance pp_instance,
                                  const char* path,
                                  PP_FileInfo* info) {
  if (!path || !info)
    return PP_ERROR_BADARGUMENT;

  PluginInstance* instance = HostGlobals::Get()->GetInstance(pp_instance);
  if (!instance)
    return PP_ERROR_FAILED;

  base::PlatformFileInfo file_info;
  base::PlatformFileError result = instance->delegate()->QueryFile(
      ::ppapi::PepperFilePath::MakeModuleLocal(
          instance->module()->name(), path),
      &file_info);
  if (result == base::PLATFORM_FILE_OK) {
    info->size = file_info.size;
    info->creation_time = TimeToPPTime(file_info.creation_time);
    info->last_access_time = TimeToPPTime(file_info.last_accessed);
    info->last_modified_time = TimeToPPTime(file_info.last_modified);
    info->system_type = PP_FILESYSTEMTYPE_EXTERNAL;
    if (file_info.is_directory)
      info->type = PP_FILETYPE_DIRECTORY;
    else
      info->type = PP_FILETYPE_REGULAR;
  }
  return ::ppapi::PlatformFileErrorToPepperError(result);
}

int32_t PPB_Flash_Impl::GetDirContents(PP_Instance pp_instance,
                                       const char* path,
                                       PP_DirContents_Dev** contents) {
  if (!path || !contents)
    return PP_ERROR_BADARGUMENT;
  PluginInstance* instance = HostGlobals::Get()->GetInstance(pp_instance);
  if (!instance)
    return PP_ERROR_FAILED;

  *contents = NULL;
  ::ppapi::DirContents pepper_contents;
  base::PlatformFileError result = instance->delegate()->GetDirContents(
      ::ppapi::PepperFilePath::MakeModuleLocal(
          instance->module()->name(), path),
      &pepper_contents);

  if (result != base::PLATFORM_FILE_OK)
    return ::ppapi::PlatformFileErrorToPepperError(result);

  *contents = new PP_DirContents_Dev;
  size_t count = pepper_contents.size();
  (*contents)->count = count;
  (*contents)->entries = new PP_DirEntry_Dev[count];
  for (size_t i = 0; i < count; ++i) {
    PP_DirEntry_Dev& entry = (*contents)->entries[i];
#if defined(OS_WIN)
    const std::string& name = UTF16ToUTF8(pepper_contents[i].name.value());
#else
    const std::string& name = pepper_contents[i].name.value();
#endif
    size_t size = name.size() + 1;
    char* name_copy = new char[size];
    memcpy(name_copy, name.c_str(), size);
    entry.name = name_copy;
    entry.is_dir = BoolToPPBool(pepper_contents[i].is_dir);
  }
  return PP_OK;
}

int32_t PPB_Flash_Impl::CreateTemporaryFile(PP_Instance instance,
                                            PP_FileHandle* file) {
  if (!file)
    return PP_ERROR_BADARGUMENT;

  PluginInstance* plugin_instance = HostGlobals::Get()->GetInstance(instance);
  if (!plugin_instance) {
    *file = PP_kInvalidFileHandle;
    return PP_ERROR_FAILED;
  }

  base::PlatformFileError result =
      plugin_instance->delegate()->CreateTemporaryFile(file);
  return ::ppapi::PlatformFileErrorToPepperError(result);
}

int32_t PPB_Flash_Impl::OpenFileRef(PP_Instance pp_instance,
                                    PP_Resource file_ref_id,
                                    int32_t mode,
                                    PP_FileHandle* file) {
  int flags = 0;
  if (!::ppapi::PepperFileOpenFlagsToPlatformFileFlags(mode, &flags) || !file)
    return PP_ERROR_BADARGUMENT;

  EnterResourceNoLock<PPB_FileRef_API> enter(file_ref_id, true);
  if (enter.failed())
    return PP_ERROR_BADRESOURCE;
  PPB_FileRef_Impl* file_ref = static_cast<PPB_FileRef_Impl*>(enter.object());

  PluginInstance* instance = HostGlobals::Get()->GetInstance(pp_instance);
  if (!instance)
    return PP_ERROR_FAILED;

  base::PlatformFile base_file;
  base::PlatformFileError result = instance->delegate()->OpenFile(
      ::ppapi::PepperFilePath::MakeAbsolute(file_ref->GetSystemPath()),
      flags,
      &base_file);
  *file = base_file;
  return ::ppapi::PlatformFileErrorToPepperError(result);
}

int32_t PPB_Flash_Impl::QueryFileRef(PP_Instance pp_instance,
                                     PP_Resource file_ref_id,
                                     PP_FileInfo* info) {
  EnterResource<PPB_FileRef_API> enter(file_ref_id, true);
  if (enter.failed())
    return PP_ERROR_BADRESOURCE;
  PPB_FileRef_Impl* file_ref = static_cast<PPB_FileRef_Impl*>(enter.object());

  PluginInstance* instance = HostGlobals::Get()->GetInstance(pp_instance);
  if (!instance)
    return PP_ERROR_FAILED;

  base::PlatformFileInfo file_info;
  base::PlatformFileError result = instance->delegate()->QueryFile(
      ::ppapi::PepperFilePath::MakeAbsolute(file_ref->GetSystemPath()),
      &file_info);
  if (result == base::PLATFORM_FILE_OK) {
    info->size = file_info.size;
    info->creation_time = TimeToPPTime(file_info.creation_time);
    info->last_access_time = TimeToPPTime(file_info.last_accessed);
    info->last_modified_time = TimeToPPTime(file_info.last_modified);
    info->system_type = PP_FILESYSTEMTYPE_EXTERNAL;
    if (file_info.is_directory)
      info->type = PP_FILETYPE_DIRECTORY;
    else
      info->type = PP_FILETYPE_REGULAR;
  }
  return ::ppapi::PlatformFileErrorToPepperError(result);
}

}  // namespace ppapi
}  // namespace webkit