Closed
Bug 197783
Opened 22 years ago
Closed 21 years ago
Can not get the reference of JavaApplet function when the browser first starts up
Categories
(Core Graveyard :: Java: OJI, defect)
Tracking
(Not tracked)
RESOLVED
DUPLICATE
of bug 115998
People
(Reporter: mlgao, Assigned: yuanyi21)
Details
Attachments
(2 files, 1 obsolete file)
User-Agent: Mozilla/5.0 (X11; U; SunOS sun4u; en-US; rv:1.4a) Gecko/20030316
Build Identifier: Mozilla/5.0 (X11; U; SunOS sun4u; en-US; rv:1.4a) Gecko/20030316
Solaris 8 with the expected patches. When the browser first loads a web page
with java applet, the javascript can not get the reference of the JavaApplet's
function, such the javascript can not call functions of JavaApplet.
Press "Reload" button of the browser, the problem disappear. Go to another page
then come back also make the problem disappeared.
I attach the necessary files to reproduce the problem.
Reproducible: Always
Steps to Reproduce:
1.Extract the attachment, put them in a web server.
2.If you have open the mozilla browser, close it.
3.Startup the mozilla browser.
4.Visit the TLiveConnect.html in the attachment.
5.Open the Java Console. After the applet starts, there will be messages in the
console.
6. Click on the "Call Java Applet" button, there is a message showing that the
reference of the java applet's function can not be retrieved.
7. Reload the page. ( Or leave this page, and then come back to this page)
8. Replace Step 6, the Java console will display:
TLiveConnectApplet[LCApplet]: CallFromJavaScript(oLCApplet)
It means that JavaScript successfully called JavaApplet function.
Attachment #117458 -
Attachment is obsolete: true
The problem does not exist on Mozilla for Windows 9X/NT/2000. Seems it only
occurs on Solaris platform.
I have tested Mozilla Release 1.0, 1.1b, 1.02, 1.3.1b and the nightly build on
03/16 on Solaris 8 and 9 with Java Plugin 1.4.0_01. The problem exists on all
versions.
My work is depending on the LiveConnect of Mozilla for Solaris, so I am in a hurry.
Thanks.
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Comment 4•22 years ago
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reproduced and investigating!
Status: UNCONFIRMED → ASSIGNED
Ever confirmed: true
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Comment 5•22 years ago
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problem about onload trigger.
This is the simplified sample to demonstrate the problem. When the page is
loaded, the JavaScript on onload event will automatically try to call the Java
Function, and report the result using alert(). There is a button, pressing it
also let JavaScript call JavaFunction.
The result is: When the browser is just startup and enter the page, the first
call will fail. Then everything works fine. It seems it is the problem of
onload event trigger.
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Comment 7•22 years ago
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This is also JPI 's bug.
It works well on Windows.
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Comment 8•22 years ago
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The problem is somehow because onload handler does not work as expected in Unix
platform
(at least Solaris). This can be proved by setting a breakpoint at nsJVMManager
::WrapJavaObject function when the page gets loaded. The function never gets
called. Which means it never gets that far to hold a jobject representing the
underlying Java applet object so that liveconnect module can call java to get
the interested methods executed.
From above, it is a Mozilla browser bug. Please find the right module to get
this bug fixed.
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Assignee | |
Comment 10•21 years ago
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This could be caused by the different architecture of java plugin module on
Windows & UNIX. On UNIX, I noticed that the applet is not fully loaded when the
onload get called. So js can't get any properties of the applet at that time.
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Assignee | |
Comment 11•21 years ago
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yes, there is a dup - bug 115998.
BTW, using a setTimeout here will work around this issue:
<BODY onload='setTimeout("oLC.vfnCallApplet()", 1000)'>
*** This bug has been marked as a duplicate of 115998 ***
Status: NEW → RESOLVED
Closed: 21 years ago
Resolution: --- → DUPLICATE
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Comment 12•21 years ago
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This has been fixed in JRE 1.5 release. JRE 1.5 will be released sometimes next
year.
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Description
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