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Merge pull request #830 from nvella/fix-829-mshtml-behaviors 

Set MSHTML IE9 Emulation Mode (fixes #829 and others)
This commit is contained in:
Jon Galloway 2019-07-05 14:14:09 -04:00 committed by GitHub
parent aa5d6e2e39 150b924799
commit 008ab86361
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 25 additions and 9 deletions
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2
src/managed/OpenLiveWriter.BlogClient/Detection/default.htm
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@ -3,7 +3,7 @@
<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; utf-8">
<META http-equiv="X-UA-Compatible" content="IE=edge" />
<META http-equiv="X-UA-Compatible" content="IE=EmulateIE9" />
<LINK href="{0}" type="text/css" rel="stylesheet">
</HEAD>

32
src/managed/OpenLiveWriter.PostEditor/PostHtmlEditing/PostHtmlEditingSettings.cs
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@ -22,6 +22,8 @@ namespace OpenLiveWriter.PostEditor.PostHtmlEditing
/// </summary>
public class PostHtmlEditingSettings : IDisposable
{
public static string UA_COMPATIBLE_STRING = "IE=EmulateIE9";
private string _blogId;
public PostHtmlEditingSettings(string blogId)
{
@ -110,19 +112,33 @@ namespace OpenLiveWriter.PostEditor.PostHtmlEditing
templateHtml = templateHtml.Replace(origPath, newUri);
}
/*Parse meta tags in order to set CSS3 compatibility*/
Regex metatag = new Regex(@"<(?i:meta)(\s)+(?i:http-equiv)(\s)*=""(?:X-UA-Compatible)""(\s)+(?i:content)(\s)*=""(?i:IE=edge)""(\s)*/>");
/* Parse meta tags in order to set MSHTML emulation for IE9
As of Internet Explorer 10, support for element behaviors have been removed.
Core OLW functionality, such as table management, currently rely on these mechanisms.
An alternative to Element Behaviors must be found before we can push the IE version forward to allow for newer web standards. */
// Search for an existing X-UA-Compatible tag in the template
Regex metatag = new Regex(@"<(?i:meta)(?:\s)+(?i:http-equiv)(?:\s)*=""(?:X-UA-Compatible)""(?:\s)+(?i:content)(?:\s)*=""(\S*)""(?:\s)*/>");
Match match = metatag.Match(templateHtml);
if (!match.Success)
if (match.Success && match.Groups.Count > 1)
{
// prepend the metatag to make css3 compatible at least on edge (Windows 8+)
// There already exists a 'X-UA-Compatible' meta tag in the template, modify it
// Grab info on the existing 'content' value
var contentVal = match.Groups[1];
// Remove the content value from the template
var templateContentRemoved = templateHtml.Remove(contentVal.Index, contentVal.Length);
// Add the IE9 emulation string into the HTML template
templateHtml = templateContentRemoved.Insert(contentVal.Index, UA_COMPATIBLE_STRING);
} else
{
// Prepend meta tag for IE9 emulation
int i = templateHtml.IndexOf("<HEAD>", StringComparison.OrdinalIgnoreCase);
if (i > 0)
{
templateHtml = ( templateHtml.Substring(0, i + 6)
+ "<meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\" />"
+ templateHtml.Substring(i + 6) );
{
templateHtml = (templateHtml.Substring(0, i + 6)
+ $"<meta http-equiv=\"X-UA-Compatible\" content=\"{UA_COMPATIBLE_STRING}\" />"
+ templateHtml.Substring(i + 6));
}
}