text: /*
   * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
   *
   * 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.
   * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
   *     its contributors may be used to endorse or promote products derived
   *     from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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.
   */
  
  import * as Common from '../common/common.js';
  import * as Host from '../host/host.js';
  import * as UI from '../ui/ui.js';
  import * as Workspace from '../workspace/workspace.js';
  
  /**
   * @unrestricted
   */
  export class ImageView extends UI.View.SimpleView {
    /**
     * @param {string} mimeType
     * @param {!Common.ContentProvider.ContentProvider} contentProvider
     */
    constructor(mimeType, contentProvider) {
      super(Common.UIString.UIString('Image'));
      this.registerRequiredCSS('source_frame/imageView.css');
      this.element.tabIndex = 0;
      this.element.classList.add('image-view');
      this._url = contentProvider.contentURL();
      this._parsedURL = new Common.ParsedURL.ParsedURL(this._url);
      this._mimeType = mimeType;
      this._contentProvider = contentProvider;
      this._uiSourceCode = contentProvider instanceof Workspace.UISourceCode.UISourceCode ?
          /** @type {!Workspace.UISourceCode.UISourceCode} */ (contentProvider) :
          null;
      if (this._uiSourceCode) {
        this._uiSourceCode.addEventListener(
            Workspace.UISourceCode.Events.WorkingCopyCommitted, this._workingCopyCommitted, this);
        new UI.DropTarget.DropTarget(
            this.element, [UI.DropTarget.Type.ImageFile, UI.DropTarget.Type.URI],
            Common.UIString.UIString('Drop image file here'), this._handleDrop.bind(this));
      }
      this._sizeLabel = new UI.Toolbar.ToolbarText();
      this._dimensionsLabel = new UI.Toolbar.ToolbarText();
      this._mimeTypeLabel = new UI.Toolbar.ToolbarText(mimeType);
      this._container = this.element.createChild('div', 'image');
      this._imagePreviewElement = this._container.createChild('img', 'resource-image-view');
      this._imagePreviewElement.addEventListener('contextmenu', this._contextMenu.bind(this), true);
      this._imagePreviewElement.alt = ls`Image from ${this._url}`;
    }
  
    /**
     * @override
     * @return {!Promise<!Array<!UI.Toolbar.ToolbarItem>>}
     */
    async toolbarItems() {
      return [
        this._sizeLabel, new UI.Toolbar.ToolbarSeparator(), this._dimensionsLabel, new UI.Toolbar.ToolbarSeparator(),
        this._mimeTypeLabel
      ];
    }
  
    /**
     * @override
     */
    wasShown() {
      this._updateContentIfNeeded();
    }
  
    /**
     * @override
     */
    disposeView() {
      if (this._uiSourceCode) {
        this._uiSourceCode.removeEventListener(
            Workspace.UISourceCode.Events.WorkingCopyCommitted, this._workingCopyCommitted, this);
      }
    }
  
    _workingCopyCommitted() {
      this._updateContentIfNeeded();
    }
  
    async _updateContentIfNeeded() {
      const {content} = await this._contentProvider.requestContent();
      if (this._cachedContent === content) {
        return;
      }
  
      const contentEncoded = await this._contentProvider.contentEncoded();
      this._cachedContent = content;
      let imageSrc = Common.ContentProvider.contentAsDataURL(content, this._mimeType, contentEncoded);
      if (content === null) {
        imageSrc = this._url;
      }
      const loadPromise = new Promise(x => this._imagePreviewElement.onload = x);
      this._imagePreviewElement.src = imageSrc;
      const size = content && !contentEncoded ? content.length : base64ToSize(content);
      this._sizeLabel.setText(Number.bytesToString(size));
      await loadPromise;
      this._dimensionsLabel.setText(Common.UIString.UIString(
          '%d × %d', this._imagePreviewElement.naturalWidth, this._imagePreviewElement.naturalHeight));
    }
  
    _contextMenu(event) {
      const contextMenu = new UI.ContextMenu.ContextMenu(event);
      if (!this._parsedURL.isDataURL()) {
        contextMenu.clipboardSection().appendItem(
            Common.UIString.UIString('Copy image URL'), this._copyImageURL.bind(this));
      }
      if (this._imagePreviewElement.src) {
        contextMenu.clipboardSection().appendItem(
            Common.UIString.UIString('Copy image as data URI'), this._copyImageAsDataURL.bind(this));
      }
  
      contextMenu.clipboardSection().appendItem(
          Common.UIString.UIString('Open image in new tab'), this._openInNewTab.bind(this));
      contextMenu.clipboardSection().appendItem(Common.UIString.UIString('Save\u2026'), this._saveImage.bind(this));
      contextMenu.show();
    }
  
    _copyImageAsDataURL() {
      Host.InspectorFrontendHost.InspectorFrontendHostInstance.copyText(this._imagePreviewElement.src);
    }
  
    _copyImageURL() {
      Host.InspectorFrontendHost.InspectorFrontendHostInstance.copyText(this._url);
    }
  
    _saveImage() {
      const link = createElement('a');
      link.download = this._parsedURL.displayName;
      link.href = this._url;
      link.click();
    }
  
    _openInNewTab() {
      Host.InspectorFrontendHost.InspectorFrontendHostInstance.openInNewTab(this._url);
    }
  
    /**
     * @param {!DataTransfer} dataTransfer
     */
    async _handleDrop(dataTransfer) {
      const items = dataTransfer.items;
      if (!items.length || items[0].kind !== 'file') {
        return;
      }
  
      const entry = items[0].webkitGetAsEntry();
      const encoded = !entry.name.endsWith('.svg');
      entry.file(file => {
        const reader = new FileReader();
        reader.onloadend = () => {
          let result;
          try {
            result = /** @type {?string} */ (reader.result);
          } catch (e) {
            result = null;
            console.error('Can\'t read file: ' + e);
          }
          if (typeof result !== 'string') {
            return;
          }
          this._uiSourceCode.setContent(encoded ? btoa(result) : result, encoded);
        };
        if (encoded) {
          reader.readAsBinaryString(file);
        } else {
          reader.readAsText(file);
        }
      });
    }
  }
  