The embedded WebView browser I am using needs special handling for particular URLs, to open them in the native default browser instead of WebView. The actual browsing part works fine but I need to stop the WebView from displaying that page as well. I can think of several ways to do it but none of them work. Here is my code:
this.wv.getEngine().locationProperty().addListener(new ChangeListener<String>() {
@Override
public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue)
{
Desktop d = Desktop.getDesktop();
try
{
URI address = new URI(observable.getValue());
if ((address.getQuery() + "").indexOf("_openmodal=true") > -1)
{
// wv.getEngine().load(oldValue); // 1
// wv.getEngine().getLoadWorker().cancel(); // 2
// wv.getEngine().executeScript("history.back()"); // 3
d.browse(address);
}
}
catch (IOException | URISyntaxException e)
{
displayError(e);
}
}
});
A bit more info about what happens in each of three cases
1. Loading the previous address
wv.getEngine().load(oldValue);
This kills the JVM. Funnily enough, the page opens fine in the native browser.
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x000000005b8fef38, pid=7440, tid=8000
#
# JRE version: 7.0_09-b05
# Java VM: Java HotSpot(TM) 64-Bit Server VM (23.5-b02 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C [jfxwebkit.dll+0x2fef38] Java_com_sun_webpane_platform_BackForwardList_bflItemGetIcon+0x184f58
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# C:UsersGreg BalagaeclipseCompanyapphs_err_pid7440.log
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
2. Cancelling the worker
wv.getEngine().getLoadWorker().cancel();
Does nothing, the page loads in both the WebView and native browser.
3. Using history.back()
wv.getEngine().executeScript("history.back()");
Same as above, no effect.
4. Reacting to Stage changes instead
I have also tried to instead of looking the locationProperty
of WebEngine
, listen on chenges for stateProperty
of the Worker
and fire the same opening code if newState == State.SCHEDULED
. There was no difference in result from previous method (apart from not actually being able to use #1).
Update
The code I'm using now still crashes the JVM:
this.wv.getEngine().locationProperty().addListener(new ChangeListener<String>() {
@Override
public void changed(ObservableValue<? extends String> observable, final String oldValue, String newValue)
{
Desktop d = Desktop.getDesktop();
try
{
URI address = new URI(newValue);
if ((address.getQuery() + "").indexOf("_openmodal=true") > -1)
{
Platform.runLater(new Runnable() {
@Override
public void run()
{
wv.getEngine().load(oldValue);
}
});
d.browse(address);
}
}
catch (IOException | URISyntaxException e)
{
displayError(e);
}
}
});
Workaround
Ok I managed to make it work by tearing down the webview and rebuilding it.
this.wv.getEngine().locationProperty().addListener(new ChangeListener<String>() {
@Override
public void changed(ObservableValue<? extends String> observable, final String oldValue, String newValue)
{
Desktop d = Desktop.getDesktop();
try
{
URI address = new URI(newValue);
if ((address.getQuery() + "").indexOf("_openmodal=true") > -1)
{
Platform.runLater(new Runnable() {
@Override
public void run()
{
grid_layout.getChildren().remove(wv);
wv = new WebView();
grid_layout.add(wv, 0, 1);
wv.getEngine().load(oldValue);
}
});
d.browse(address);
}
}
catch (IOException | URISyntaxException e)
{
displayError(e);
}
}
});
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