// 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 "content/shell/layout_test_controller.h"

#include "base/md5.h"

#include "base/stringprintf.h"

#include "content/public/renderer/render_view.h"

#include "content/shell/shell_messages.h"

#include "skia/ext/platform_canvas.h"

#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebCString.h"

#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebRect.h"

#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebSize.h"

#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebString.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/WebFrame.h"

#include "third_party/WebKit/Source/WebKit/chromium/public/WebTestingSupport.h"

#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"

#include "webkit/glue/webkit_glue.h"

using WebKit::WebFrame;

using WebKit::WebElement;

using WebKit::WebRect;

using WebKit::WebSize;

using WebKit::WebTestingSupport;

using WebKit::WebView;

namespace content {

namespace {

std::string DumpDocumentText(WebFrame* frame) {

// We use the document element's text instead of the body text here because

// not all documents have a body, such as XML documents.

WebElement documentElement = frame->document().documentElement();

if (documentElement.isNull())

return std::string();

return documentElement.innerText().utf8();

}

std::string DumpDocumentPrintedText(WebFrame* frame) {

return frame->renderTreeAsText(WebFrame::RenderAsTextPrinting).utf8();

}

std::string DumpFramesAsText(WebFrame* frame, bool printing, bool recursive) {

std::string result;

// Cannot do printed format for anything other than HTML.

if (printing && !frame->document().isHTMLDocument())

return std::string();

// Add header for all but the main frame. Skip emtpy frames.

if (frame->parent() && !frame->document().documentElement().isNull()) {

result.append("\n--------\nFrame: '");

result.append(frame->name().utf8().data());

result.append("'\n--------\n");

}

result.append(

printing ? DumpDocumentPrintedText(frame) : DumpDocumentText(frame));

result.append("\n");

if (recursive) {

for (WebFrame* child = frame->firstChild(); child;

child = child->nextSibling()) {

result.append(DumpFramesAsText(child, printing, recursive));

}

}

return result;

}

std::string DumpFrameScrollPosition(WebFrame* frame, bool recursive) {

std::string result;

WebSize offset = frame->scrollOffset();

if (offset.width > 0 || offset.height > 0) {

if (frame->parent()) {

result.append(

base::StringPrintf("frame '%s' ", frame->name().utf8().data()));

}

result.append(

base::StringPrintf("scrolled to %d,%d\n", offset.width, offset.height));

}

if (recursive) {

for (WebFrame* child = frame->firstChild(); child;

child = child->nextSibling()) {

result.append(DumpFrameScrollPosition(child, recursive));

}

}

return result;

}

bool PaintViewIntoCanvas(WebView* view, skia::PlatformCanvas& canvas) {

view->layout();

const WebSize& size = view->size();

if (!canvas.initialize(size.width, size.height, true))

return false;

view->paint(webkit_glue::ToWebCanvas(&canvas),

WebRect(0, 0, size.width, size.height));

return true;

}

#if !defined(OS_MACOSX)

void MakeBitmapOpaque(SkBitmap* bitmap) {

SkAutoLockPixels lock(*bitmap);

DCHECK(bitmap->config() == SkBitmap::kARGB_8888_Config);

for (int y = 0; y < bitmap->height(); ++y) {

uint32_t* row = bitmap->getAddr32(0, y);

for (int x = 0; x < bitmap->width(); ++x)

row[x] |= 0xFF000000; // Set alpha bits to 1.

}

}

#endif

void CaptureSnapshot(WebView* view, SkBitmap* snapshot) {

skia::PlatformCanvas canvas;

if (!PaintViewIntoCanvas(view, canvas))

return;

SkDevice* device = skia::GetTopDevice(canvas);

const SkBitmap& bitmap = device->accessBitmap(false);

bitmap.copyTo(snapshot, SkBitmap::kARGB_8888_Config);

#if !defined(OS_MACOSX)

// Only the expected PNGs for Mac have a valid alpha channel.

MakeBitmapOpaque(snapshot);

#endif

}

} // namespace

LayoutTestController::LayoutTestController(RenderView* render_view)

: RenderViewObserver(render_view) {

}

LayoutTestController::~LayoutTestController() {

}

void LayoutTestController::DidClearWindowObject(WebFrame* frame) {

WebTestingSupport::injectInternalsObject(frame);

}

void LayoutTestController::DidFinishLoad(WebFrame* frame) {

if (!frame->parent())

Send(new ShellViewHostMsg_DidFinishLoad(routing_id()));

}

bool LayoutTestController::OnMessageReceived(const IPC::Message& message) {

bool handled = true;

IPC_BEGIN_MESSAGE_MAP(LayoutTestController, message)

IPC_MESSAGE_HANDLER(ShellViewMsg_CaptureTextDump, OnCaptureTextDump)

IPC_MESSAGE_HANDLER(ShellViewMsg_CaptureImageDump, OnCaptureImageDump)

IPC_MESSAGE_UNHANDLED(handled = false)

IPC_END_MESSAGE_MAP()

return handled;

}

void LayoutTestController::OnCaptureTextDump(bool as_text,

bool printing,

bool recursive) {

WebFrame* frame = render_view()->GetWebView()->mainFrame();

std::string dump;

if (as_text) {

dump = DumpFramesAsText(frame, printing, recursive);

} else {

WebFrame::RenderAsTextControls render_text_behavior =

WebFrame::RenderAsTextNormal;

if (printing)

render_text_behavior |= WebFrame::RenderAsTextPrinting;

dump = frame->renderTreeAsText(render_text_behavior).utf8();

dump.append(DumpFrameScrollPosition(frame, recursive));

}

Send(new ShellViewHostMsg_TextDump(routing_id(), dump));

}

void LayoutTestController::OnCaptureImageDump(

const std::string& expected_pixel_hash) {

SkBitmap snapshot;

CaptureSnapshot(render_view()->GetWebView(), &snapshot);

SkAutoLockPixels snapshot_lock(snapshot);

base::MD5Digest digest;

base::MD5Sum(snapshot.getPixels(), snapshot.getSize(), &digest);

std::string actual_pixel_hash = base::MD5DigestToBase16(digest);

if (actual_pixel_hash == expected_pixel_hash) {

SkBitmap empty_image;

Send(new ShellViewHostMsg_ImageDump(

routing_id(), actual_pixel_hash, empty_image));

}

Send(new ShellViewHostMsg_ImageDump(

routing_id(), actual_pixel_hash, snapshot));

}

} // namespace content