hi Henrik,
this code is not intended to be used as part of the DynAPI. It is just some
piece of code I placed together and thought someone could find useful. I'm not
even sure it works for IFRAMEs or ILAYERs.
What I tried to avoid is to have a setTimeout process that tests for one
property in order to detect a page's onLoad. My approach is event-driven.
And yes it is a bit of a hack but after all the DynAPI, any API in fact, is a
bunch of hacks placed together that provide a formal and user-friendly
programming interface, thus hiding to the programmer the lacks of the choosen
lower-level technology and giving an ilusion of consistence.
regards
Henrik Olsen wrote:
> Is'nt this a bit of a hack. What about making a special eventListener for
> the DynDocument, that listenes for "document.title" or something else in the
> frame. Should'nt that be possible?
>
> -----Oprindelig meddelelse-----
> Fra: Jordi 'IlMaestro' Ministral [mailto:[EMAIL PROTECTED]]
> Sendt: 13. december 2000 12:43
> Til: [EMAIL PROTECTED]
> Emne: [Dynapi-Help] External load manager object
>
> Here's something that had been running around my head for a while. When
> doing big applications it is common to have a hidden data frame where we
> submit data or retrieve data from into our web application. One common
> caveat is to detect that data frame's
> onLoad events. Typically we would place some code in that frame's source so
> it informs the caller of its loading completion and so and so on.
>
> Another annoying situation is having a frame structure and performing some
> initialization stuf each time content in one frame is changed ( creating a
> floating menu inside that page, for example )
>
> This object solves this problem by managing loads of its target frame and
> capturing onloads events0. This way the loaded page itsef does not have to
> contain any synchronizing code.
>
> Here goes the code and attached is a simple example. I could have upped it
> via CVS but I'm not sure about where does it fit or if it should be
> considered part of the API. Maybe we need some sort of a 'misc. scrips'
> folder.
>
> /*
>
> Frame Load manager: allows to cast external file loads into a frame
> and program their onload events.
>
> IlMaestro ([EMAIL PROTECTED])
>
> 2000.13.12
>
> Usage:
>
> mr = new loadManager(myframe)
> mr.load("p.html")
>
> */
>
> loadManager = function(frame) {
> this.id = "LM"+(loadManager.Count++)
> window[this.id] = this
> this.frame = frame
>
> /* Should we catch links within the content, so when they are clicked the
> new page is
> loaded via our object as well, allowing us to detect the new page's onLoad
> event ? */
> this.catchLinks = true
> this.onload = new Function()
> }
>
> /* Use this method to load urls into the target frame */
> loadManager.prototype.load = function(url) {
> with(this.frame.document) {
> /* It seems that NS has troubles with one-frame framesets, therefore we
> resort to
> a dummy frame that is anyway invisible */
> open()
> write("<frameset onLoad='window.pointerToLoader.loaded()' cols='110%,*'
> border=0>")
> write("<frame name='"+this.id+"Content' src='"+url+"' border=0>")
> write("<frame name='"+this.id+"Dummy' src='about:blank' border=0
> scrolling=no>")
> write("</frameset>")
> close()
> }
> this.frame['pointerToLoader']=this
> }
>
> /* This method is called by the code we wrote into the target frame once the
> frameset is loaded
> ( which means that the content frame has finished loading ) */
> loadManager.prototype.loaded = function() {
> if(this.catchLinks) this.parseLinks()
> this.onload()
> }
>
> /* This method parses the links in the target document and replaces their
> content with calls
> to our loader. There are a number of cases to be taken into consideraration:
> for example, links
> in the form of 'javascript:...' must be left untouched.
>
> I bet I'll miss some cases :(
> */
> loadManager.prototype.parseLinks = function() {
> eval("var e=this.frame."+this.id+"Content.document.links")
> for (var i=0;i<e.length;i++) {
> l = e[i].href
> if(l.substring(0,11)!='javascript:' && l.substring(0,7)!='mailto:')
> e[i].href = ''")'
> }
> }
> loadManager.Count=0
>
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