|
public static GetXmlDomFromHtml ( string content, bool includeXmlDeclaration = false ) : |
||
| content | string | |
| includeXmlDeclaration | bool | |
| return | ||
/// <summary>
/// What's going on here: the browser is just /editting displaying a copy of one page of the document.
/// So we need to copy any changes back to the real DOM.
/// </summary>
private void LoadPageDomFromBrowser()
{
if (_pageDom == null)
{
return;
}
#if DEBUG
if (_pageDom.SelectNodes("//textarea").Count > 0)
{
Debug.Fail("Oh, a chance to test bluring textarea's!");
}
#endif
//as of august 2012 textareas only occur in the Calendar
// if (_pageDom.SelectNodes("//textarea").Count >0)
{
//This approach was to force an onblur so that we can get at the actual user-edited value.
//This caused problems, with Bloom itself (the Shell) not knowing that it is active.
//_browser.WebBrowserFocus.Deactivate();
//_browser.WebBrowserFocus.Activate();
//now, we just do the blur directly.
var activeElement = _browser.Window.Document.ActiveElement;
if (activeElement != null)
{
activeElement.Blur();
}
}
var body = _browser.Document.GetElementsByTagName("body");
if (body.Count == 0) //review: this does happen... onValidating comes along, but there is no body. Assuming it is a timing issue.
{
return;
}
var content = body[0].InnerHtml;
XmlDocument dom;
//todo: deal with exception that can come out of this
try
{
dom = XmlHtmlConverter.GetXmlDomFromHtml(content, false);
var bodyDom = dom.SelectSingleNode("//body");
if (_pageDom == null)
{
return;
}
var destinationDomPage = _pageDom.SelectSingleNode("//body/div[contains(@class,'bloom-page')]");
if (destinationDomPage == null)
{
return;
}
var expectedPageId = destinationDomPage["id"];
var browserPageId = bodyDom.SelectSingleNode("//body/div[contains(@class,'bloom-page')]");
if (browserPageId == null)
{
return; //why? but I've seen it happen
}
var thisPageId = browserPageId["id"];
if (expectedPageId != thisPageId)
{
Palaso.Reporting.ErrorReport.NotifyUserOfProblem("Bloom encountered an error saving that page (unexpected page id)");
return;
}
_pageDom.GetElementsByTagName("body")[0].InnerXml = bodyDom.InnerXml;
var customStyleSheet = _browser.Document.StyleSheets.Where(s =>
{
var idNode = s.OwnerNode.Attributes["id"];
if (idNode == null)
{
return(false);
}
return(idNode.NodeValue == "customBookStyles");
}).FirstOrDefault();
if (customStyleSheet != null)
{
/* why are we bothering to walk through the rules instead of just copying the html of the style tag? Because that doesn't
* actually get updated when the javascript edits the stylesheets of the page. Well, the <style> tag gets created, but
* rules don't show up inside of it. So
* this won't work: _pageDom.GetElementsByTagName("head")[0].InnerText = customStyleSheet.OwnerNode.OuterHtml;
*/
var styles = new StringBuilder();
styles.AppendLine("<style id='customStyles' type='text/css'>");
foreach (var cssRule in customStyleSheet.CssRules)
{
styles.AppendLine(cssRule.CssText);
}
styles.AppendLine("</style>");
Debug.WriteLine("*CustomStylesheet in browser:" + styles);
_pageDom.GetElementsByTagName("head")[0].InnerXml = styles.ToString();
}
//enhance: we have jscript for this: cleanup()... but running jscript in this method was leading the browser to show blank screen
// foreach (XmlElement j in _pageDom.SafeSelectNodes("//div[contains(@class, 'ui-tooltip')]"))
// {
// j.ParentNode.RemoveChild(j);
// }
// foreach (XmlAttribute j in _pageDom.SafeSelectNodes("//@ariasecondary-describedby | //@aria-describedby"))
// {
// j.OwnerElement.RemoveAttributeNode(j);
// }
}
catch (Exception e)
{
Palaso.Reporting.ErrorReport.NotifyUserOfProblem(e, "Sorry, Bloom choked on something on this page (invalid incoming html).\r\n\r\n+{0}", e);
return;
}
try
{
XmlHtmlConverter.ThrowIfHtmlHasErrors(_pageDom.OuterXml);
}
catch (Exception e)
{
var exceptionWithHtmlContents = new Exception(content);
Palaso.Reporting.ErrorReport.NotifyUserOfProblem(e, "Sorry, Bloom choked on something on this page (validating page).\r\n\r\n+{0}", e.Message);
}
}
/// <summary>
/// What's going on here: the browser is just /editting displaying a copy of one page of the document.
/// So we need to copy any changes back to the real DOM.
/// </summary>
private void LoadPageDomFromBrowser()
{
Debug.Assert(!InvokeRequired);
if (_pageEditDom == null)
{
return;
}
var contentDocument = _browser.Document;
if (_pageEditDom != _rootDom)
{
// Assume _editDom corresponds to a frame called 'page' in the root. This may eventually need to be more configurable.
if (_browser.Window == null || _browser.Window.Document == null)
{
return;
}
var frameElement = _browser.Window.Document.GetElementById("page") as GeckoIFrameElement;
if (frameElement == null)
{
return;
}
contentDocument = frameElement.ContentDocument;
}
if (contentDocument == null)
{
return; // can this happen?
}
// As of august 2012 textareas only occur in the Calendar
if (_pageEditDom.SelectNodes("//textarea").Count > 0)
{
//This approach was to force an onblur so that we can get at the actual user-edited value.
//This caused problems, with Bloom itself (the Shell) not knowing that it is active.
//_browser.WebBrowserFocus.Deactivate();
//_browser.WebBrowserFocus.Activate();
// Now, we just do the blur directly.
var activeElement = contentDocument.ActiveElement;
if (activeElement != null)
{
activeElement.Blur();
}
}
var body = contentDocument.GetElementsByTagName("body");
if (body.Length == 0) //review: this does happen... onValidating comes along, but there is no body. Assuming it is a timing issue.
{
return;
}
var content = body[0].InnerHtml;
XmlDocument dom;
//todo: deal with exception that can come out of this
try
{
dom = XmlHtmlConverter.GetXmlDomFromHtml(content, false);
var bodyDom = dom.SelectSingleNode("//body");
if (_pageEditDom == null)
{
return;
}
var destinationDomPage = _pageEditDom.SelectSingleNode("//body//div[contains(@class,'bloom-page')]");
if (destinationDomPage == null)
{
return;
}
var expectedPageId = destinationDomPage["id"];
var browserPageId = bodyDom.SelectSingleNode("//body//div[contains(@class,'bloom-page')]");
if (browserPageId == null)
{
return; //why? but I've seen it happen
}
var thisPageId = browserPageId["id"];
if (expectedPageId != thisPageId)
{
Palaso.Reporting.ErrorReport.NotifyUserOfProblem("Bloom encountered an error saving that page (unexpected page id)");
return;
}
_pageEditDom.GetElementsByTagName("body")[0].InnerXml = bodyDom.InnerXml;
var userModifiedStyleSheet = contentDocument.StyleSheets.FirstOrDefault(s =>
{
// workaround for bug #40 (https://bitbucket.org/geckofx/geckofx-29.0/issue/40/xpath-error-hresult-0x805b0034)
// var titleNode = s.OwnerNode.EvaluateXPath("@title").GetSingleNodeValue();
var titleNode = s.OwnerNode.EvaluateXPath("@title").GetNodes().FirstOrDefault();
if (titleNode == null)
{
return(false);
}
return(titleNode.NodeValue == "userModifiedStyles");
});
if (userModifiedStyleSheet != null)
{
SaveCustomizedCssRules(userModifiedStyleSheet);
}
//enhance: we have jscript for this: cleanup()... but running jscript in this method was leading the browser to show blank screen
// foreach (XmlElement j in _editDom.SafeSelectNodes("//div[contains(@class, 'ui-tooltip')]"))
// {
// j.ParentNode.RemoveChild(j);
// }
// foreach (XmlAttribute j in _editDom.SafeSelectNodes("//@ariasecondary-describedby | //@aria-describedby"))
// {
// j.OwnerElement.RemoveAttributeNode(j);
// }
}
catch (Exception e)
{
Debug.Fail("Debug Mode Only: Error while trying to read changes to CSSRules. In Release, this just gets swallowed. Will now re-throw the exception.");
#if DEBUG
throw;
#endif
}
try
{
XmlHtmlConverter.ThrowIfHtmlHasErrors(_pageEditDom.OuterXml);
}
catch (Exception e)
{
var exceptionWithHtmlContents = new Exception(content);
ErrorReport.NotifyUserOfProblem(e,
"Sorry, Bloom choked on something on this page (validating page).{1}{1}+{0}",
e.Message, Environment.NewLine);
}
}
