/*
 * Copyright (C) 2007 Apple Inc.  All rights reserved.
 * Copyright (C) 2013 Google Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "third_party/blink/renderer/core/page/drag_data.h"

#include "third_party/blink/renderer/core/clipboard/data_object.h"
#include "third_party/blink/renderer/core/dom/document_fragment.h"
#include "third_party/blink/renderer/core/dom/range.h"
#include "third_party/blink/renderer/core/editing/serializers/serialization.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/platform/file_metadata.h"
#include "third_party/blink/renderer/platform/weborigin/kurl.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "ui/base/clipboard/clipboard_constants.h"

namespace blink {

DragData::DragData(DataObject* data,
                   const gfx::PointF& client_position,
                   const gfx::PointF& global_position,
                   DragOperationsMask source_operation_mask,
                   bool force_default_action)
    : client_position_(client_position),
      global_position_(global_position),
      platform_drag_data_(data),
      dragging_source_operation_mask_(source_operation_mask),
      force_default_action_(force_default_action) {}

bool DragData::ContainsHTML() const {
  return platform_drag_data_->Types().Contains(ui::kMimeTypeHtml);
}

bool DragData::ContainsURL(FilenameConversionPolicy filename_policy) const {
  return platform_drag_data_->Types().Contains(ui::kMimeTypeUriList) ||
         (filename_policy == kConvertFilenames &&
          platform_drag_data_->ContainsFilenames());
}

String DragData::AsURL(FilenameConversionPolicy filename_policy,
                       String* title) const {
  String url;
  if (platform_drag_data_->Types().Contains(ui::kMimeTypeUriList)) {
    platform_drag_data_->UrlAndTitle(url, title);
  } else if (filename_policy == kConvertFilenames && ContainsFiles()) {
    url = FilePathToURL(platform_drag_data_->Filenames()[0]);
  }
  return url;
}

Vector<String> DragData::AsURLs(
    FilenameConversionPolicy filename_policy) const {
  Vector<String> result;
  if (platform_drag_data_->Types().Contains(ui::kMimeTypeUriList)) {
    const auto urls = platform_drag_data_->Urls();
    result.reserve(urls.size());
    for (const String& url : urls) {
      result.push_back(url);
    }
  } else if (filename_policy == kConvertFilenames && ContainsFiles()) {
    const auto filenames = platform_drag_data_->Filenames();
    result.reserve(filenames.size());
    for (const String& filename : filenames) {
      result.push_back(FilePathToURL(filename));
    }
  }
  return result;
}

bool DragData::ContainsFiles() const {
  return platform_drag_data_->ContainsFilenames();
}

int DragData::GetModifiers() const {
  return platform_drag_data_->GetModifiers();
}

bool DragData::ForceDefaultAction() const {
  return force_default_action_;
}

void DragData::AsFilePaths(Vector<String>& result) const {
  const Vector<String>& filenames = platform_drag_data_->Filenames();
  for (wtf_size_t i = 0; i < filenames.size(); ++i) {
    if (!filenames[i].empty())
      result.push_back(filenames[i]);
  }
}

unsigned DragData::NumberOfFiles() const {
  return platform_drag_data_->Filenames().size();
}

bool DragData::ContainsPlainText() const {
  return platform_drag_data_->Types().Contains(ui::kMimeTypePlainText);
}

String DragData::AsPlainText() const {
  return platform_drag_data_->GetData(ui::kMimeTypePlainText);
}

bool DragData::CanSmartReplace() const {
  // Mimic the situations in which mac allows drag&drop to do a smart replace.
  // This is allowed whenever the drag data contains a 'range' (ie.,
  // ClipboardWin::writeRange is called). For example, dragging a link
  // should not result in a space being added.
  return platform_drag_data_->Types().Contains(ui::kMimeTypePlainText) &&
         !platform_drag_data_->Types().Contains(ui::kMimeTypeUriList);
}

bool DragData::ContainsCompatibleContent() const {
  return ContainsPlainText() || ContainsURL() || ContainsHTML() ||
         ContainsFiles();
}

DocumentFragment* DragData::AsFragment(LocalFrame* frame) const {
  /*
     * Order is richest format first. On OSX this is:
     * * Web Archive
     * * Filenames
     * * HTML
     * * RTF
     * * TIFF
     * * PICT
     */

  if (ContainsFiles()) {
    // FIXME: Implement this. Should be pretty simple to make some HTML
    // and call createFragmentFromMarkup.
  }

  if (ContainsHTML()) {
    String html;
    KURL base_url;
    platform_drag_data_->HtmlAndBaseURL(html, base_url);
    DCHECK(frame->GetDocument());
    if (DocumentFragment* fragment =
            CreateStrictlyProcessedFragmentFromMarkupWithContext(
                *frame->GetDocument(), html, 0, html.length(), base_url)) {
      return fragment;
    }
  }

  return nullptr;
}

String DragData::DroppedFileSystemId() const {
  return platform_drag_data_->FilesystemId();
}

}  // namespace blink