Added callstack support

Currently only sets the state with the current callstack

autoload/vebugger.vim

@@ -196,3 +196,7 @@ function! vebugger#showLogBuffer()
 		call s:debugger.showLogBuffer()
 	endif
 endfunction
+
+function! vebugger#getActiveDebugger()
+	return s:debugger
+endfunction

autoload/vebugger/jdb.vim

@@ -32,13 +32,19 @@ function! s:readWhere(pipeName,line,readResult,debugger)
 	if 'out'==a:pipeName
 		let l:matches=matchlist(a:line,'\v\s*\[(\d+)]\s*(\S+)\s*\(([^:]*):(\d*)\)')
 		if 4<len(l:matches)
-			if '1'==l:matches[1] " check that this is the innermost stackframe
-				let l:file=s:findFolderFromStackTrace(a:debugger.state.std.srcpath,l:matches[2]).'/'.l:matches[3]
-				let l:file=fnamemodify(l:file,':~:.')
+			let l:file=s:findFolderFromStackTrace(a:debugger.state.std.srcpath,l:matches[2]).'/'.l:matches[3]
+			let l:file=fnamemodify(l:file,':~:.')
+			let l:frameNumber=str2nr(l:matches[1])
+			if 1==l:frameNumber " first stackframe is the current location
 				let a:readResult.std.location={
 							\'file':(l:file),
 							\'line':(l:matches[4])}
 			endif
+			let a:readResult.std.callstack={
+						\'clearOld':('1'==l:frameNumber),
+						\'add':'after',
+						\'file':(l:file),
+						\'line':(l:matches[4])}
 		endif
 	end
 endfunction

autoload/vebugger/std.vim

@@ -2,12 +2,14 @@
 function! vebugger#std#setStandardState(debugger)
 	let a:debugger.state.std={
 				\'srcpath':'.',
-				\'location':{}}
+				\'location':{},
+				\'callstack':[]}
 endfunction
 
 function! vebugger#std#setStandardReadResultTemplate(debugger)
 	let a:debugger.readResultTemplate.std={
-				\'location':{}}
+				\'location':{},
+				\'callstack':{}}
 endfunction
 
 function! vebugger#std#addStandardFunctions(debugger)
@@ -68,6 +70,21 @@ function! s:standardThinkHandlers.moveToCurrentLine(readResult,debugger) dict
 	endif
 endfunction
 
+function! s:standardThinkHandlers.updateCallStack(readResult,debugger) dict
+	let l:callstack=a:readResult.std.callstack
+	if !empty(l:callstack)
+		if get(l:callstack,'clearOld')
+			let a:debugger.state.std.callstack=[]
+		endif
+		let l:frame={'file':(l:callstack.file),'line':(l:callstack.line)}
+		if 'after'==get(l:callstack,'add')
+			call add(a:debugger.state.std.callstack,l:frame)
+		elseif 'before'==get(l:callstack,'add')
+			call insert(a:debugger.state.std.callstack,l:frame)
+		endif
+	endif
+endfunction
+
 let s:standardCloseHandlers={}
 function! s:standardCloseHandlers.removeCurrentMarker(debugger) dict
 	sign unplace 1