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OpenLiveWriter/src/managed/OpenLiveWriter.PostEditor/PostHtmlEditing/ImageInsertionManager.cs

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// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for details.
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Globalization;
using System.IO;
using System.Text;
using System.Windows.Forms;
using mshtml;
using OpenLiveWriter.Controls;
using OpenLiveWriter.CoreServices;
using OpenLiveWriter.CoreServices.Diagnostics;
using OpenLiveWriter.Extensibility.BlogClient;
using OpenLiveWriter.Extensibility.ImageEditing;
using OpenLiveWriter.HtmlParser.Parser;
using OpenLiveWriter.Localization;
using OpenLiveWriter.PostEditor.ContentSources;
using OpenLiveWriter.PostEditor.Emoticons;
using OpenLiveWriter.PostEditor.PostHtmlEditing.ImageEditing.Decorators;
namespace OpenLiveWriter.PostEditor.PostHtmlEditing
{
public static class ImageInsertionManager
{
private static Uri LoadingImagePath = new Uri(Path.Combine(ApplicationEnvironment.InstallationDirectory, @"html\loading.png"));
private static bool selectionChanged;
/// <summary>
/// Scans the DOM for images that have not yet been properly initialized by the editor.
/// As part of the initialization, the default image settings and effects will be applied to the image.
/// </summary>
internal static void ScanAndInitializeNewImages(IBlogPostHtmlEditor currentEditor, ISupportingFileService fileService, IEditorAccount editorAccount, ContentEditor editor, Control owner, bool useDefaultTargetSettings, bool selectLastImage)
{
if (currentEditor is BlogPostHtmlEditorControl)
{
// Scanning the images and doing basic initialization is done on the UI thread.
List<NewImageInfo> newImages = ScanImages(currentEditor, editorAccount, editor, useDefaultTargetSettings);
if (newImages.Count > 0)
{
// The time-consuming initialization is done in a background thread.
ImageInitializationAsyncOperation imageInitializer = new ImageInitializationAsyncOperation(newImages, fileService, owner);
imageInitializer.Completed += new EventHandler((sender, e) =>
ProcessInitializedImages(newImages, currentEditor, editor, owner, selectLastImage));
editor.DisposeOnEditorChange(imageInitializer);
imageInitializer.Start();
}
}
}
private static List<NewImageInfo> ScanImages(IBlogPostHtmlEditor currentEditor, IEditorAccount editorAccount, ContentEditor editor, bool useDefaultTargetSettings)
{
List<NewImageInfo> newImages = new List<NewImageInfo>();
ApplicationPerformance.ClearEvent("InsertImage");
ApplicationPerformance.StartEvent("InsertImage");
using (new WaitCursor())
{
IHTMLElement2 postBodyElement = (IHTMLElement2)((BlogPostHtmlEditorControl)currentEditor).PostBodyElement;
if (postBodyElement != null)
{
foreach (IHTMLElement imgElement in postBodyElement.getElementsByTagName("img"))
{
string imageSrc = imgElement.getAttribute("srcDelay", 2) as string;
if (string.IsNullOrEmpty(imageSrc))
{
imageSrc = imgElement.getAttribute("src", 2) as string;
}
// WinLive 96840 - Copying and pasting images within shared canvas should persist source
// decorator settings. "wlCopySrcUrl" is inserted while copy/pasting within canvas.
bool copyDecoratorSettings = false;
string attributeCopySrcUrl = imgElement.getAttribute("wlCopySrcUrl", 2) as string;
if (!string.IsNullOrEmpty(attributeCopySrcUrl))
{
copyDecoratorSettings = true;
imgElement.removeAttribute("wlCopySrcUrl", 0);
}
// Check if we need to apply default values for image decorators
bool applyDefaultDecorator = true;
string attributeNoDefaultDecorator = imgElement.getAttribute("wlNoDefaultDecorator", 2) as string;
if (!string.IsNullOrEmpty(attributeNoDefaultDecorator) && string.Compare(attributeNoDefaultDecorator, "TRUE", StringComparison.OrdinalIgnoreCase) == 0)
{
applyDefaultDecorator = false;
imgElement.removeAttribute("wlNoDefaultDecorator", 0);
}
string applyDefaultMargins = imgElement.getAttribute("wlApplyDefaultMargins", 2) as string;
if (!String.IsNullOrEmpty(applyDefaultMargins))
{
DefaultImageSettings defaultImageSettings = new DefaultImageSettings(editorAccount.Id, editor.DecoratorsManager);
MarginStyle defaultMargin = defaultImageSettings.GetDefaultImageMargin();
// Now apply it to the image
imgElement.style.marginTop = String.Format(CultureInfo.InvariantCulture, "{0} px", defaultMargin.Top);
imgElement.style.marginLeft = String.Format(CultureInfo.InvariantCulture, "{0} px", defaultMargin.Left);
imgElement.style.marginBottom = String.Format(CultureInfo.InvariantCulture, "{0} px", defaultMargin.Bottom);
imgElement.style.marginRight = String.Format(CultureInfo.InvariantCulture, "{0} px", defaultMargin.Right);
imgElement.removeAttribute("wlApplyDefaultMargins", 0);
}
if ((UrlHelper.IsFileUrl(imageSrc) || IsFullPath(imageSrc)) && !ContentSourceManager.IsSmartContent(imgElement))
{
Uri imageSrcUri = new Uri(imageSrc);
try
{
BlogPostImageData imageData = BlogPostImageDataList.LookupImageDataByInlineUri(editor.ImageList, imageSrcUri);
Emoticon emoticon = EmoticonsManager.GetEmoticon(imgElement);
if (imageData == null && emoticon != null)
{
// This is usually an emoticon copy/paste and needs to be cleaned up.
Uri inlineImageUri = editor.EmoticonsManager.GetInlineImageUri(emoticon);
imgElement.setAttribute("src", UrlHelper.SafeToAbsoluteUri(inlineImageUri), 0);
}
else if (imageData == null)
{
if (!File.Exists(imageSrcUri.LocalPath))
throw new FileNotFoundException(imageSrcUri.LocalPath);
// WinLive 188841: Manually attach the behavior so that the image cannot be selected or resized while its loading.
DisabledImageElementBehavior disabledImageBehavior = new DisabledImageElementBehavior(editor.IHtmlEditorComponentContext);
disabledImageBehavior.AttachToElement(imgElement);
Size sourceImageSize = ImageUtils.GetImageSize(imageSrcUri.LocalPath);
ImagePropertiesInfo imageInfo = new ImagePropertiesInfo(imageSrcUri, sourceImageSize, new ImageDecoratorsList(editor.DecoratorsManager, new BlogPostSettingsBag()));
DefaultImageSettings defaultImageSettings = new DefaultImageSettings(editorAccount.Id, editor.DecoratorsManager);
// Make sure this is set because some imageInfo properties depend on it.
imageInfo.ImgElement = imgElement;
bool isMetafile = ImageHelper2.IsMetafile(imageSrcUri.LocalPath);
ImageClassification imgClass = ImageHelper2.Classify(imageSrcUri.LocalPath);
if (!isMetafile && ((imgClass & ImageClassification.AnimatedGif) != ImageClassification.AnimatedGif))
{
// WinLive 96840 - Copying and pasting images within shared canvas should persist source
// decorator settings.
if (copyDecoratorSettings)
{
// Try to look up the original copied source image.
BlogPostImageData imageDataOriginal = BlogPostImageDataList.LookupImageDataByInlineUri(editor.ImageList, new Uri(attributeCopySrcUrl));
if (imageDataOriginal != null && imageDataOriginal.GetImageSourceFile() != null)
{
// We have the original image reference, so lets make a clone of it.
BlogPostSettingsBag originalBag = (BlogPostSettingsBag)imageDataOriginal.ImageDecoratorSettings.Clone();
ImageDecoratorsList originalDecoratorsList = new ImageDecoratorsList(editor.DecoratorsManager, originalBag);
ImageFileData originalImageFileData = imageDataOriginal.GetImageSourceFile();
Size originalImageSize = new Size(originalImageFileData.Width, originalImageFileData.Height);
imageInfo = new ImagePropertiesInfo(originalImageFileData.Uri, originalImageSize, originalDecoratorsList);
}
else
{
// There are probably decorators applied to the image, but in a different editor so we can't access them.
// We probably don't want to apply any decorators to this image, so apply blank decorators and load the
// image as full size so it looks like it did before.
imageInfo.ImageDecorators = defaultImageSettings.LoadBlankLocalImageDecoratorsList();
imageInfo.InlineImageSizeName = ImageSizeName.Full;
}
}
else if (applyDefaultDecorator)
{
imageInfo.ImageDecorators = defaultImageSettings.LoadDefaultImageDecoratorsList();
if ((imgClass & ImageClassification.TransparentGif) == ImageClassification.TransparentGif)
imageInfo.ImageDecorators.AddDecorator(NoBorderDecorator.Id);
}
else
{
// Don't use default values for decorators
imageInfo.ImageDecorators = defaultImageSettings.LoadBlankLocalImageDecoratorsList();
imageInfo.InlineImageSizeName = ImageSizeName.Full;
}
}
else
{
ImageDecoratorsList decorators = new ImageDecoratorsList(editor.DecoratorsManager, new BlogPostSettingsBag());
decorators.AddDecorator(editor.DecoratorsManager.GetDefaultRemoteImageDecorators());
imageInfo.ImageDecorators = decorators;
}
imageInfo.ImgElement = imgElement;
imageInfo.DhtmlImageViewer = editorAccount.EditorOptions.DhtmlImageViewer;
//discover the "natural" target settings from the DOM
string linkTargetUrl = imageInfo.LinkTargetUrl;
if (linkTargetUrl == imageSrc)
{
imageInfo.LinkTarget = LinkTargetType.IMAGE;
}
else if (!String.IsNullOrEmpty(linkTargetUrl) && !UrlHelper.IsFileUrl(linkTargetUrl))
{
imageInfo.LinkTarget = LinkTargetType.URL;
}
else
{
imageInfo.LinkTarget = LinkTargetType.NONE;
}
if (useDefaultTargetSettings)
{
if (!GlobalEditorOptions.SupportsFeature(ContentEditorFeature.SupportsImageClickThroughs) && imageInfo.DefaultLinkTarget == LinkTargetType.IMAGE)
imageInfo.DefaultLinkTarget = LinkTargetType.NONE;
if (imageInfo.LinkTarget == LinkTargetType.NONE)
imageInfo.LinkTarget = imageInfo.DefaultLinkTarget;
if (imageInfo.DefaultLinkOptions.ShowInNewWindow)
imageInfo.LinkOptions.ShowInNewWindow = true;
imageInfo.LinkOptions.UseImageViewer = imageInfo.DefaultLinkOptions.UseImageViewer;
imageInfo.LinkOptions.ImageViewerGroupName = imageInfo.DefaultLinkOptions.ImageViewerGroupName;
}
Size defaultImageSize = defaultImageSettings.GetDefaultInlineImageSize();
Size initialSize = ImageUtils.GetScaledImageSize(defaultImageSize.Width, defaultImageSize.Height, sourceImageSize);
// add to list of new images
newImages.Add(new NewImageInfo(imageInfo, imgElement, initialSize, disabledImageBehavior));
}
else
{
// When switching blogs, try to adapt image viewer settings according to the blog settings.
ImagePropertiesInfo imageInfo = new ImagePropertiesInfo(imageSrcUri, ImageUtils.GetImageSize(imageSrcUri.LocalPath), new ImageDecoratorsList(editor.DecoratorsManager, imageData.ImageDecoratorSettings));
imageInfo.ImgElement = imgElement;
// Make sure the new crop and tilt decorators get loaded
imageInfo.ImageDecorators.MergeDecorators(DefaultImageSettings.GetImplicitLocalImageDecorators());
string viewer = imageInfo.DhtmlImageViewer;
if (viewer != editorAccount.EditorOptions.DhtmlImageViewer)
{
imageInfo.DhtmlImageViewer = editorAccount.EditorOptions.DhtmlImageViewer;
imageInfo.LinkOptions = imageInfo.DefaultLinkOptions;
}
// If the image is an emoticon, update the EmoticonsManager with the image's uri so that duplicate emoticons can point to the same file.
if (emoticon != null)
editor.EmoticonsManager.SetInlineImageUri(emoticon, imageData.InlineImageFile.Uri);
}
}
catch (ArgumentException e)
{
Trace.WriteLine("Could not initialize image: " + imageSrc);
Trace.WriteLine(e.ToString());
}
catch (DirectoryNotFoundException)
{
Debug.WriteLine("Image file does not exist: " + imageSrc);
}
catch (FileNotFoundException)
{
Debug.WriteLine("Image file does not exist: " + imageSrc);
}
catch (IOException e)
{
Debug.WriteLine("Image file cannot be read: " + imageSrc + " " + e);
DisplayMessage.Show(MessageId.FileInUse, imageSrc);
}
}
}
}
}
return newImages;
}
private static void ProcessInitializedImages(List<NewImageInfo> newImages, IBlogPostHtmlEditor currentEditor, ContentEditor editor, Control owner, bool selectLastImage)
{
// Remove all invalid images first
List<NewImageInfo> newImagesToUpdate = new List<NewImageInfo>();
for (int i = 0; i < newImages.Count; i++)
{
NewImageInfo info = newImages[i];
if (info.Remove)
{
using (ContentEditor.EditorUndoUnit undo = new ContentEditor.EditorUndoUnit(currentEditor, true))
{
info.DisabledImageBehavior.DetachFromElement();
HTMLElementHelper.RemoveElement(info.Element);
undo.Commit();
}
}
else
{
newImagesToUpdate.Add(info);
}
}
// Queue up processing for any remaining valid images
MultiTaskHelper tasks = new MultiTaskHelper(30);
for (int i = 0; i < newImagesToUpdate.Count; i++)
{
bool lastElement = i == (newImagesToUpdate.Count - 1);
NewImageInfo info = newImagesToUpdate[i];
tasks.AddWork(delegate
{
// WinLive 214012: If the original insertion operation is undone before we get to this point make
// sure we don't attempt to update the HTML. Elements that are removed via an undo, but that we
// still hold a reference to, are put into another document whose readyState is "uninitialized".
// It's also possible that the picture has already been updated if a user undoes and redoes the
// initial insertion multiple times.
IHTMLDocument2 doc = (IHTMLDocument2)info.Element.document;
if (doc == null || doc.readyState.Equals("uninitialized", StringComparison.OrdinalIgnoreCase) ||
BlogPostImageDataList.LookupImageDataByInlineUri(editor.ImageList, info.ImageData.InlineImageFile.Uri) != null)
{
info.DisabledImageBehavior.DetachFromElement();
return;
}
using (new QuickTimer("ProcessInitializedImage"))
using (ContentEditor.EditorUndoUnit undo = new ContentEditor.EditorUndoUnit(currentEditor, true))
{
editor.ImageList.AddImage(info.ImageData);
info.Element.setAttribute("src", UrlHelper.SafeToAbsoluteUri(info.ImageData.InlineImageFile.Uri), 0);
info.Element.removeAttribute("srcDelay", 0);
// Create the decorators
ImageEditingPropertyHandler.UpdateImageSource(info.ImageInfo, info.Element, editor, new ImageInsertHandler(), ImageDecoratorInvocationSource.InitialInsert);
// Manually detach the behavior so that the image can be selected and resized.
info.DisabledImageBehavior.DetachFromElement();
if (lastElement)
{
ApplicationPerformance.EndEvent("InsertImage");
HandleNewImage((BlogPostHtmlEditorControl)currentEditor, owner, info.Element, selectLastImage);
}
undo.Commit();
if (editor.ETWProvider != null)
editor.ETWProvider.WriteEvent("InlinePhotoEnd");
}
});
}
// If there were no images to update, stop the perf timer
if (newImagesToUpdate.Count == 0)
{
ApplicationPerformance.EndEvent("InsertImage");
}
// When the editor is closing, or changing to a new blog post we need to get rid of this object
// which will then stop all the unfinished images from continuing to load.
editor.DisposeOnEditorChange(tasks);
tasks.Start();
}
private static bool IsFullPath(string str)
{
try
{
return File.Exists(str);
}
catch (Exception e)
{
Trace.Fail("Surprising, File.Exists threw an exception: " + e);
return false;
}
}
public const int DELAYED_IMAGE_THRESHOLD = 2;
/// <summary>
/// Inserts a set of images into the current editor, optionally assigning each image an id.
/// </summary>
/// <param name="imagePaths">paths of the images to insert</param>
internal static void InsertImagesCore(IBlogPostHtmlEditor currentEditor, ISupportingFileService fileService, IEditorAccount editorAccount, OpenLiveWriter.PostEditor.ContentEditor editor, string[] imagePaths)
{
using (OpenLiveWriter.PostEditor.ContentEditor.EditorUndoUnit undo = new OpenLiveWriter.PostEditor.ContentEditor.EditorUndoUnit(currentEditor))
{
StringBuilder htmlBuilder = new StringBuilder();
//calculate the size for inserted images (based on the user's saved default for this blog)
DefaultImageSettings defaultImageSettings = new DefaultImageSettings(editorAccount.Id, editor.DecoratorsManager);
Size defaultImageSize = defaultImageSettings.GetDefaultInlineImageSize();
//Generate the default img HTML for the image paths. Initially, the images are linked to the source image
//path so that the DOM version of the HTML can be loaded. Once the images are loaded into the DOM, we can apply
//the image decorators to generate scaled images, borders, etc.
ImagePropertiesInfo[] imageInfos = new ImagePropertiesInfo[imagePaths.Length];
// don't insert into the title
currentEditor.FocusBody();
for (int i = 0; i < imageInfos.Length; i++)
{
string imagePath = imagePaths[i];
Uri imgUri;
if (UrlHelper.IsUrl(imagePath))
imgUri = new Uri(imagePath);
else
imgUri = new Uri(UrlHelper.CreateUrlFromPath(imagePath));
Size imageSize = new Size(1, 1);
if (imgUri.IsFile && File.Exists(imagePath))
{
if (!File.Exists(imgUri.LocalPath))
Trace.Fail("Error inserting image - the image URL was corrupted: " + imagePath);
else
{
try
{
//check the validity of the image file
imageSize = ImageUtils.GetImageSize(imagePath);
}
catch (Exception)
{
Trace.WriteLine("There is a problem with the image file: " + imagePath);
// Insert anyway, MSHTML will show a red X in place of the image.
htmlBuilder.AppendFormat(CultureInfo.InvariantCulture, "<img src=\"{0}\" /><p>&nbsp;</p>", HtmlUtils.EscapeEntities(UrlHelper.SafeToAbsoluteUri(imgUri)));
continue;
}
}
}
// If the image has an embedded thumbnail, we'll use it as a place holder for the <img src="...">
// until we generate an inline image and apply decorators.
Stream embeddedThumbnailStream = ImageHelper2.GetEmbeddedThumbnailStream(imagePath);
if (embeddedThumbnailStream != null)
{
// Save thumbnail to disk.
ISupportingFile imageFileEmbeddedThumbnail = fileService.CreateSupportingFile(Path.GetFileName(imagePath), Guid.NewGuid().ToString(), embeddedThumbnailStream);
imageSize = ImageUtils.GetScaledImageSize(defaultImageSize.Width, defaultImageSize.Height, imageSize);
//insert the default image html
String imageElementAttrs = String.Format(CultureInfo.InvariantCulture, " width=\"{0}\" height=\"{1}\"", imageSize.Width, imageSize.Height);
htmlBuilder.AppendFormat(CultureInfo.InvariantCulture, "<img src=\"{0}\" srcDelay=\"{1}\" {2} /><p>&nbsp;</p>", HtmlUtils.EscapeEntities(UrlHelper.SafeToAbsoluteUri(imageFileEmbeddedThumbnail.FileUri)), HtmlUtils.EscapeEntities(imgUri.ToString()), imageElementAttrs);
}
else if (currentEditor is BlogPostHtmlEditorControl && (imagePaths.Length > DELAYED_IMAGE_THRESHOLD || imageSize.Width * imageSize.Height > 16777216/*4096 X 4096*/))
{
// If we are using a delayed loading tactic then we insert using the srcdelay
htmlBuilder.Append(MakeHtmlForImageSourceDelay(imgUri.ToString()));
}
else
{
imageSize = ImageUtils.GetScaledImageSize(defaultImageSize.Width, defaultImageSize.Height, imageSize);
//insert the default image html
String imageElementAttrs = imgUri.IsFile ? String.Format(CultureInfo.InvariantCulture, " width=\"{0}\" height=\"{1}\"", imageSize.Width, imageSize.Height) : String.Empty;
htmlBuilder.AppendFormat(CultureInfo.InvariantCulture, "<img src=\"{0}\" {1} /><p>&nbsp;</p>", HtmlUtils.EscapeEntities(UrlHelper.SafeToAbsoluteUri(imgUri)), imageElementAttrs);
}
}
//insert the HTML into the editor
currentEditor.InsertHtml(htmlBuilder.ToString(), false);
selectionChanged = false;
BlogPostHtmlEditorControl blogPostEditor = currentEditor as BlogPostHtmlEditorControl;
if (blogPostEditor != null)
blogPostEditor.SelectionChanged += blogPostEditor_SelectionChanged;
//now that the image HTML is inserted into the editor, apply the default settings to the new images.
undo.Commit();
}
}
private static void HandleNewImage(BlogPostHtmlEditorControl currentEditor, Control owner, IHTMLElement imageElement, bool select)
{
// If the selection has changed since we first inserted the img tag, don't force a new selection.
currentEditor.SelectionChanged -= blogPostEditor_SelectionChanged;
if (selectionChanged || !select)
return;
try
{
currentEditor.EmptySelection();
// programmatically select the image
currentEditor.SelectImage(imageElement);
currentEditor.Focus();
}
catch (Exception ex)
{
Trace.Fail("Unexpected error while attempting to select newly inserted image: " + ex.ToString());
}
}
public static string MakeHtmlForImageSourceDelay(string path)
{
return
String.Format(CultureInfo.InvariantCulture, "<img src=\"{1}\" srcDelay=\"{0}\" /><p>&nbsp;</p>", HtmlUtils.EscapeEntities(path), HtmlUtils.EscapeEntities(UrlHelper.SafeToAbsoluteUri(LoadingImagePath)));
}
internal static string ReferenceFixer(BeginTag tag, string reference, ISupportingFileService _fileService, OpenLiveWriter.PostEditor.ContentEditor editor)
{
// If it isnt a file url, then it wont be an image from supporting files.
if (!UrlHelper.IsFile(reference))
return reference;
Uri uri = new Uri(reference);
BlogPostImageData imageData = BlogPostImageDataList.LookupImageDataByInlineUri(editor.ImageList, uri);
if (imageData == null)
{
if (BlogPostImageDataList.LookupImageDataByLinkedUri(editor.ImageList, uri) != null)
return null;
return reference;
}
return imageData.ImageSourceFile.Uri.AbsoluteUri;
}
private static void blogPostEditor_SelectionChanged(object sender, EventArgs e)
{
selectionChanged = true;
}
}
}
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