overleaf/services/web/public/coffee/ide/directives/layout.coffee

define [
	"base"
	"libs/jquery-layout"
], (App) ->
	App.directive "layout", ["$parse", "$compile", "ide", ($parse, $compile, ide) ->
		return {
			compile: () ->
				pre: (scope, element, attrs) ->
					name = attrs.layout

					customTogglerPane = attrs.customTogglerPane
					customTogglerMsgWhenOpen = attrs.customTogglerMsgWhenOpen
					customTogglerMsgWhenClosed = attrs.customTogglerMsgWhenClosed
					hasCustomToggler = customTogglerPane? and customTogglerMsgWhenOpen? and customTogglerMsgWhenClosed?

					if attrs.spacingOpen?
						spacingOpen = parseInt(attrs.spacingOpen, 10)
					else
						spacingOpen = window.uiConfig.defaultResizerSizeOpen

					if attrs.spacingClosed?
						spacingClosed = parseInt(attrs.spacingClosed, 10)
					else
						spacingClosed = window.uiConfig.defaultResizerSizeClosed

					options =
						spacing_open: spacingOpen
						spacing_closed: spacingClosed
						slidable: false
						enableCursorHotkey: false
						onopen: (pane) => 
							onPaneOpen(pane)
						onclose: (pane) => 
							onPaneClose(pane)
						onresize: () =>
							onInternalResize()
						maskIframesOnResize: scope.$eval(
							attrs.maskIframesOnResize or "false"
						)
						east:
							size: scope.$eval(attrs.initialSizeEast)
							initClosed: scope.$eval(attrs.initClosedEast)
						west:
							size: scope.$eval(attrs.initialSizeEast)
							initClosed: scope.$eval(attrs.initClosedWest)

					# Restore previously recorded state
					if (state = ide.localStorage("layout.#{name}"))?
						if state.east?
							if !attrs.minimumRestoreSizeEast? or (state.east.size >= attrs.minimumRestoreSizeEast and !state.east.initClosed)
								options.east = state.east
						if state.west?
							if !attrs.minimumRestoreSizeWest? or (state.west.size >= attrs.minimumRestoreSizeWest and !state.west.initClosed)
								options.west = state.west

					if window.uiConfig.eastResizerCursor?
						options.east.resizerCursor = window.uiConfig.eastResizerCursor

					if window.uiConfig.westResizerCursor?
						options.west.resizerCursor = window.uiConfig.westResizerCursor
						
					repositionControls = () ->
						state = element.layout().readState()
						if state.east?
							controls = element.find("> .ui-layout-resizer-controls")
							if state.east.initClosed
								controls.hide()
							else
								controls.show()
								controls.css({
									right: state.east.size
								})

					repositionCustomToggler = () ->
						if !customTogglerEl?
							return
						state = element.layout().readState()
						positionAnchor = if customTogglerPane == "east" then "right" else "left"
						paneState = state[customTogglerPane]
						if paneState?
							customTogglerEl.css(positionAnchor, if paneState.initClosed then 0 else paneState.size)
	
					resetOpenStates = () ->
						state = element.layout().readState()
						if attrs.openEast? and state.east?
							openEast = $parse(attrs.openEast)
							openEast.assign(scope, !state.east.initClosed)

					# Someone moved the resizer
					onInternalResize = () ->
						state = element.layout().readState()
						scope.$broadcast "layout:#{name}:resize", state
						repositionControls()
						if hasCustomToggler
							repositionCustomToggler()
						resetOpenStates()
						
					oldWidth = element.width()
					# Something resized our parent element
					onExternalResize = () ->
						if attrs.resizeProportionally? and scope.$eval(attrs.resizeProportionally)
							eastState = element.layout().readState().east
							if eastState?
								newInternalWidth = eastState.size / oldWidth * element.width()
								oldWidth = element.width()
								element.layout().sizePane("east", newInternalWidth)
								return
							
						element.layout().resizeAll()

					element.layout options
					element.layout().resizeAll()

					if attrs.resizeOn?
						for event in attrs.resizeOn.split ","
							scope.$on event, () -> onExternalResize()

					if hasCustomToggler
						state = element.layout().readState()
						customTogglerScope = scope.$new()

						customTogglerScope.isOpen = true
						customTogglerScope.isVisible = true

						if state[customTogglerPane]?.initClosed == true
							customTogglerScope.isOpen = false

						customTogglerScope.tooltipMsgWhenOpen = customTogglerMsgWhenOpen
						customTogglerScope.tooltipMsgWhenClosed = customTogglerMsgWhenClosed
							
						customTogglerScope.tooltipPlacement = if customTogglerPane == "east" then "left" else "right"
						customTogglerScope.handleClick = () ->
							element.layout().toggle(customTogglerPane)
							repositionCustomToggler()
						customTogglerEl = $compile("
							<a href 
							   ng-show=\"isVisible\"
							   class=\"custom-toggler #{ 'custom-toggler-' + customTogglerPane }\"
							   ng-class=\"isOpen ? 'custom-toggler-open' : 'custom-toggler-closed'\"
							   tooltip=\"{{ isOpen ? tooltipMsgWhenOpen : tooltipMsgWhenClosed }}\"
							   tooltip-placement=\"{{ tooltipPlacement }}\"
							   ng-click=\"handleClick()\">
						")(customTogglerScope)
						element.append(customTogglerEl)

					onPaneOpen = (pane) ->
						if !hasCustomToggler and pane != customTogglerPane
							return
						customTogglerEl.scope().$applyAsync () -> 
							customTogglerEl.scope().isOpen = true

					onPaneClose = (pane) ->
						if !hasCustomToggler and pane != customTogglerPane
							return
						customTogglerEl.scope().$applyAsync () -> 
							customTogglerEl.scope().isOpen = false

					# Save state when exiting
					$(window).unload () ->
						ide.localStorage("layout.#{name}", element.layout().readState())

					if attrs.openEast?
						scope.$watch attrs.openEast, (value, oldValue) ->
							if value? and value != oldValue
								if value
									element.layout().open("east")
								else
									element.layout().close("east")
							setTimeout () ->
								scope.$digest()
							, 0

					if attrs.allowOverflowOn?
						layoutObj = element.layout()
						overflowPane = scope.$eval(attrs.allowOverflowOn)
						overflowPaneEl = layoutObj.panes[overflowPane]
						# Set the panel as overflowing (gives it higher z-index and sets overflow rules)
						layoutObj.allowOverflow overflowPane
						# Read the given z-index value and increment it, so that it's higher than synctex controls.
						overflowPaneZVal = overflowPaneEl.zIndex()
						overflowPaneEl.css "z-index", overflowPaneZVal + 1

					resetOpenStates()
					onInternalResize()

					if attrs.layoutDisabled?
						scope.$watch attrs.layoutDisabled, (value) ->
							if value
								element.layout().hide("east")
							else
								element.layout().show("east")
							if hasCustomToggler
								customTogglerEl.scope().$applyAsync () ->
									customTogglerEl.scope().isOpen = !value
									customTogglerEl.scope().isVisible = !value


				post: (scope, element, attrs) ->
					name = attrs.layout
					state = element.layout().readState()
					scope.$broadcast "layout:#{name}:linked", state
		}
	]