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+%D \module
+%D [ file=java-stp,
+%D version=2004.03.15,
+%D title=\CONTEXT\ JavaScript Macros,
+%D subtitle=Stepping,
+%D author=Hans Hagen,
+%D date=\currentdate,
+%D copyright={PRAGMA / Hans Hagen \& Ton Otten}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+% we define ocglist global, otherwise we quickly run into a memory hog (even
+% out of memory in a 512 Meg machine)
+
+% we cannot use doc_visited[this.pageNum] instead of doc_currentstep because
+% of some funny side effect (i.e. dup or so)
+
+% todo: test with later as we do autoinsert now
+
+\startJSpreamble Steps used now
+
+var doc_ocglist = this.getOCGs() ;
+var doc_stepname = "step" ;
+var doc_currentstep = 0 ;
+var doc_maxstep = 50 ;
+var doc_visited = new Array() ;
+var doc_busy = new Array() ;
+
+function SetupStepper(layername,laststep) {
+ doc_stepname = layername ;
+ doc_maxstep = laststep ;
+ for (var i=0; i<=this.numPages; i++) {
+ doc_visited[i] = 0 ;
+ doc_busy[i] = 0 ;
+ }
+}
+
+for (var i=0; i<=this.numPages; i++) {
+ doc_visited[i] = 0 ;
+ doc_busy[i] = 0 ;
+}
+
+function GetOCG(name) {
+ for (var i=0; i < doc_ocglist.length; i++) {
+ if (doc_ocglist[i].name == name) {
+ return doc_ocglist[i] ;
+ }
+ }
+ return null ;
+}
+
+function CheckBusy() {
+ var ocg = GetOCG("step:busy") ;
+ if (ocg != null) {
+ if (doc_visited[this.pageNum]==0) {
+ ocg.state = true ;
+ } else {
+ if (doc_visited[this.pageNum]<doc_busy[this.pageNum]) {
+ ocg.state = true ;
+ } else {
+ ocg.state = false ;
+ }
+ }
+ }
+}
+
+function SetStepper(maxstep,state) {
+ for (var i=1; i<=maxstep; i++) {
+ try {
+ var ocg = GetOCG(doc_stepname + ':' + String(i)) ;
+ if (ocg != null) {
+ ocg.state = state ;
+ }
+ } catch (e) {
+ return ;
+ }
+ }
+}
+
+function CheckStepper(maxsteps) {
+ SetStepper(doc_visited[this.pageNum], true) ;
+ doc_busy[this.pageNum] = Number(maxsteps) ;
+ doc_currentstep = doc_visited[this.pageNum] ;
+ CheckBusy() ;
+}
+
+function ResetStepper() {
+ SetStepper(doc_maxstep, false) ;
+ doc_currentstep = 0 ;
+}
+
+function InvokeStepper() {
+ try {
+ if (doc_currentstep<doc_busy[this.pageNum]) {
+ doc_currentstep += 1 ;
+ doc_visited[this.pageNum] = doc_currentstep ;
+ var ocg = GetOCG(doc_stepname + ':' + String(doc_currentstep)) ;
+ if (ocg != null) {
+ ocg.state = true ;
+ }
+ } else {
+ if (this.pageNum+1==this.numPages) {
+ this.pageNum = 0 ;
+ } else {
+ this.pageNum += 1 ;
+ }
+ }
+ CheckBusy() ;
+ } catch (e) {
+ return ;
+ }
+}
+
+\stopJSpreamble
+
+% \definereference [SetupStepper] [JS(SetupStepper{step,50})]
+% \definereference [ResetStepper] [JS(ResetStepper)]
+% \definereference [CheckStepper] [JS(CheckStepper{\StepCounter})]
+% \definereference [InvokeStepper] [JS(InvokeStepper)]
+
+\endinput