Ability to use relative find paths!

Write ":" in the end of a search expression, followed by any of the following, how many times you desire:
- ">" select all children
- "<" select parent
- "2" selects the third layer in parent (counting starts at 0)
- "2n" selects every other layer
- "+1" selects the layer after
- "-4" selects the layer four layers before
That means you could write something like this: input (\w+):<+1>3n+1 and in the replacement box write "$1 label decoration %I" to rename every third (skipping the first) layer, in the group right after the group containing the selected field. Better yet, it does so even if you would have tens (or thousands...) of those "named input fields with labels having lots of strange decoration"... Ok, but seriously, pretty handy.

Last field value now better saved

Helpers:
Added getLayerKind
Additional alert options:
- width: works now with text fields
- icon: filePath or NSImage
- buttons: added cmd-enter shortcut for second other button + made them easier accessible in .beforeShow

LayerRenamer.sketchplugin/Contents/Sketch/helpers.cocoascript

@@ -27,6 +27,22 @@ function createDynamicClassInstanceWithMethods(methods) {
 }
 
 
+function getLayerKind(obj) {
+	var objClass = obj.class()
+	if (objClass == MSLayerGroup)
+		return 'Group'
+
+	var str = NSStringFromClass(objClass)
+	if (str.substr(0,2)=='MS') str = str.substr(2)
+	if (str.substr(-5)=='Group' || str.substr(-5)=='Layer')
+		str = str.substr(0,str.length-5)
+
+	if (str=='SymbolInstance') return 'Symbol'
+	if (str.length>5 && (str.substr(-5)=='Shape' || str=='ShapePath')) return 'Path'
+
+	return str}
+
+
 // Padder helper
 function paddStringToLength(str, len, append, char) {
 	char = char || ' '
@@ -65,6 +81,7 @@ var showAlert = function(opt) {
 
 	var self = {}
 	self._v = COSAlertWindow.new();
+	self.rawAlert = self._v.alert()
 
 	self._v.setMessageText(opt.title || '');
 	self._v.setInformativeText(opt.message || '');
@@ -97,7 +114,7 @@ var showAlert = function(opt) {
 			self.fields[fieldLabel] = field
 
 			if (i==0) {
-				self._v.alert().window().setInitialFirstResponder(field)
+				self.rawAlert.window().setInitialFirstResponder(field)
 			} else {
 				prevField.setNextKeyView(field)
 			}
@@ -121,18 +138,55 @@ var showAlert = function(opt) {
 
 	// Help
 	if (opt.showHelp) {
-		self._v.alert().showsHelp = true
+		self.rawAlert.showsHelp = true
 		var delegate = createDynamicClassInstanceWithMethods({'alertShowHelp:': opt.showHelp})
-		self._v.alert().delegate = delegate
+		self.rawAlert.delegate = delegate
 	}
 
-	// Show
+	self._v.layout()
+
+	// Set width
 	if (opt.width && !opt.fields) {
-		self._v.setAccessoryView(NSView.alloc().initWithFrame_(NSMakeRect(0, 0, opt.width, 0)))}
+		self.rawAlert.setAccessoryView(NSView.alloc().initWithFrame_(NSMakeRect(0, 0, opt.width, 0)))
+	} else if (opt.width) {
+		var frame = self.rawAlert.accessoryView().frame()
+		frame.size.width = opt.width
+		self.rawAlert.accessoryView().setFrame(frame)
+
+		Object.keys(self.fields).forEach(function(key) {
+			var field = self.fields[key]
+			var frame = field.frame()
+			frame.size.width = opt.width
+			field.setFrame(frame)
+		})
+	}
 
-	self._v.layout()
+	// Set icon
+	if (opt.icon) {
+		if (typeof opt.icon == "string")
+			opt.icon = NSImage.alloc().initWithContentsOfFile(opt.icon)
+		self.rawAlert.setIcon(opt.icon)
+	}
+
+	// Fix button shortcuts, and expose them
+	var alertButtons = self.rawAlert.buttons()
+	for (var i=0; i<alertButtons.count(); i++) {
+		var alertButton = alertButtons[i]
+		var button = self.buttons.find(function(button) {return button.index==i})
+		if (!button) button = self.buttons.push({index:i, title: undefined})
+		button._v = alertButton
+
+		if (i>=1 && i<=3 && i<alertButtons.count()-1) {
+			var mask = i==1? NSCommandKeyMask: i==2? NSAlternateKeyMask: NSShiftKeyMask
+			// mask | NSControlKeyMask
+			alertButton.setKeyEquivalentModifierMask(mask)
+			alertButton.setKeyEquivalent('\r')
+		}
+	}
+
+	// Show
 	if (opt.beforeShow) opt.beforeShow(self)
-	var selectedButtonIndex = self._v.alert().runModal() - 1000
+	var selectedButtonIndex = self.rawAlert.runModal() - 1000
 	self.selected = self.buttons.find(function (button) {return button.index == selectedButtonIndex})
 	self.canceled = selectedButtonIndex==0
 

LayerRenamer.sketchplugin/Contents/Sketch/layerRenamer.sketchscript

@@ -129,32 +129,24 @@ var layerRenamerSelect = function(context) {
 		showHelp: function (alert) {
 			showRegExHelpAlert(true)
 		},
-		beforeShow: function (alert) {
-			var rawAlert = alert._v.alert()
-
-			var filePath = scriptPath+'Resources/icons/layerRenamerSelect.png'
-			var image = NSImage.alloc().initWithContentsOfFile(filePath)
-			rawAlert.setIcon(image)
-
-			var frame = rawAlert.accessoryView().frame()
-			frame.size.width = 400
-			rawAlert.accessoryView().setFrame(frame)
-
-			Object.keys(alert.fields).forEach(function(key) {
-				var field = alert.fields[key]
-				var frame = field.frame()
-				frame.size.width = 400
-				field.setFrame(frame)
-			})
-		}
+		width: 400,
+		icon: scriptPath+'Resources/icons/layerRenamerSelect.png'
 	})
 	if (alert.selected.title=='Cancel') return;
 
 	var searchStr = alert.fields.search.value
 	if (!searchStr.length()) searchStr = defaultSearchStr
+	userDefaults.setObject_forKey_(searchStr, "LayerRenamer-search-value")
+
+	// Take out relative selection path string
+	var relativePathMatch = searchStr.match(/(?:[^\\]|^):([<>n\d+-]+)$/)
+	var relativePath = relativePathMatch ? relativePathMatch[1] : null
+	if (relativePath) searchStr = searchStr.substr(0,searchStr.length-relativePath.length-1)
+
 	var reg = new RegExp(searchStr, 'i')
 	var expressionStr = alert.fields.expression.value
 	if (!expressionStr.length()) expressionStr = defaultExpressionStr
+	userDefaults.setObject_forKey_(expressionStr, "LayerRenamer-expression-value")
 
 	var shouldFilterAll = alert.selected.title == 'Filter All'
 	var shouldFilterSelected = alert.selected.title == 'Filter selected'
@@ -165,18 +157,7 @@ var layerRenamerSelect = function(context) {
 		selectionCount = selection.count()
 		shouldFilterSelected = shouldFilterInside = true}
 
-	page.deselectAllLayers()
-	var firstSelected = false
-	function selectLayer(layer) {
-		layer.select_byExpandingSelection_(true, firstSelected)
-		firstSelected = true
-	}
-
-	var selectedTypesFreqs = {}
-	var addLayerKindToFreqs = function(layerKindName) {
-		if (!selectedTypesFreqs[layerKindName]) selectedTypesFreqs[layerKindName] = 0
-		selectedTypesFreqs[layerKindName]++}
-
+	var layersToBeSelected = []
 	var currIterationIdx = 0
 	var handleLayer = function(layer, depth) {
 		function digDeeper() {
@@ -207,9 +188,9 @@ var layerRenamerSelect = function(context) {
 
 		// Setup expression variables
 		var layerKindName = getLayerKind(layer)
-		var vars = 'Shape/Group/Artboard/Page/Slice/Bitmap/Text/Symbol/SymbolMaster/Path'.split('/').map(function(name) {
-			return 'var '+name.toLowerCase()+'='+(layerKindName==name?'true':'false')+';'
-		}).join('')
+		var vars = 'var '+'Shape/Group/Artboard/Page/Slice/Bitmap/Text/Symbol/SymbolMaster/Path'.split('/').map(function(name) {
+			return name.toLowerCase()+'='+(layerKindName==name?'true':'false')
+		}).join(', ')+';'
 		vars += 'var '+'hidden'+'='+(!layer.isVisible()?'true':'false')+';'
 		vars += 'var '+'locked'+'='+(layer.isLocked()?'true':'false')+';'
 
@@ -224,8 +205,7 @@ var layerRenamerSelect = function(context) {
 			 +paddStringToLength(str, 40, true))
 
 			//layer.setIsSelected(shouldSelect)
-			if (shouldSelect) selectLayer(layer)
-			if (shouldSelect) addLayerKindToFreqs(layerKindName)
+			if (shouldSelect) layersToBeSelected.push(layer)
 
 			// Shape is really a group, even if it doesn't
 			// look that way if it only contains one
@@ -255,6 +235,73 @@ var layerRenamerSelect = function(context) {
 	selection.some(function(layer){return handleLayer(layer, 0)})
 
 
+
+	var findLayersUsingRelativePath = function (baseLayers, path) {
+		var layers = []
+		var direction = path.match(/^:?(([<>])|((\d+n)?(([+-])?\d+)?))/)
+		if (!direction) throw 'Path "'+path+'" isn\'t valid'
+		var restPath = path.substr(direction[0].length)
+
+		if (direction[2]=='<') {
+			baseLayers.forEach(function(layer) {
+				if (layer.parentGroup) {
+					var parent = layer.parentGroup()
+					if (layers.indexOf(parent)<0)
+						layers.push(parent)
+				}
+			})
+		} else if (direction[2]=='>') {
+			baseLayers.forEach(function(layer) {
+				if (layer.layers) layer.layers()
+					.forEach(function(l) {layers.push(l)})
+			})
+		} else if (!direction[3] || !direction[3].length) { // containing group
+			throw 'Path "'+path+'" isn\'t valid.'
+		} else {
+			var usingModulus = !!direction[4]
+			var k = usingModulus? parseInt(direction[4]) : 1
+			var m = direction[5]? parseInt(direction[5]) : 0
+			var doRelative = direction[6]
+
+			baseLayers.forEach(function(layer, idx) {
+				var index = baseLayers.length-idx-1
+				if (usingModulus) {
+					if ((index+m)%k == 0)
+						layers.push(layer)
+				} else {
+					if (!layer.parentGroup) return;
+					var parent = layer.parentGroup()
+					var siblings = parent.layers()
+
+					var targetIdx = !doRelative? siblings.length-1-m : siblings.indexOf(layer) - m
+					if (targetIdx<0) targetIdx += siblings.length
+					if (targetIdx>=0 && targetIdx<siblings.length)
+						layers.push(siblings[targetIdx])
+				}
+			})
+		}
+
+		return !restPath.length? layers:
+			findLayersUsingRelativePath(layers, restPath)
+	}
+
+
+	var selectedTypesFreqs = {}
+	var addLayerKindToFreqs = function(layerKindName) {
+		if (!selectedTypesFreqs[layerKindName]) selectedTypesFreqs[layerKindName] = 0
+		selectedTypesFreqs[layerKindName]++}
+
+	layersToBeSelected = !relativePath? layersToBeSelected:
+		findLayersUsingRelativePath(layersToBeSelected, relativePath)
+
+	page.deselectAllLayers()
+	layersToBeSelected.forEach(function(layer) {
+		if (layer.isSelected()) return;
+		addLayerKindToFreqs(getLayerKind(layer))
+		layer.select_byExpandingSelection_(true, true)
+	})
+
+
 	// Message
 	var selectedTypes = Object.keys(selectedTypesFreqs)
 	var newSelectionCount = selectedTypes.reduce(function(p,v) {return p+selectedTypesFreqs[v]}, 0)
@@ -276,10 +323,6 @@ var layerRenamerSelect = function(context) {
 	}
 
 	doc.showMessage(msg)
-
-	// Save for later
-	userDefaults.setObject_forKey_(searchStr, "LayerRenamer-search-value")
-	userDefaults.setObject_forKey_(expressionStr, "LayerRenamer-expression-value")
 }
 
 var layerRenamerRename = function(context) {
@@ -310,14 +353,10 @@ var layerRenamerRename = function(context) {
 		showHelp: function (alert) {
 			showRegExHelpAlert(false)
 		},
+		width: 400,
+		icon: scriptPath+'Resources/icons/layerRenamerRename.png',
 		beforeShow: function (alert) {
-			var rawAlert = alert._v.alert()
-
-			var filePath = scriptPath+'Resources/icons/layerRenamerRename.png'
-			var image = NSImage.alloc().initWithContentsOfFile(filePath)
-			rawAlert.setIcon(image)
-
-			rawAlert.window().setInitialFirstResponder(alert.fields.replace)
+			alert.rawAlert.window().setInitialFirstResponder(alert.fields.replace)
 		}
 	})
 	if (alert.selected.title=='Cancel') return;
@@ -387,9 +426,10 @@ function replaceLayerExpressionFlags(expression, layer, quoteStrings, selectionC
 			var parentLyr = lyr.parentGroup()
 			if (!parentLyr) return quoteStrings?null:'?'
 
+			var siblings = parentLyr.layers()
 			var indexInParent = parentLyr.indexOfLayer_(lyr)
-			if (flag.substr(0,1)=='i') return zeroPad(flag, indexInParent)
-			if (flag.substr(0,1)=='I') return zeroPad(flag, indexInParent+1)
+			if (flag.substr(0,1)=='i') return zeroPad(flag, !useReverse ? siblings.length-indexInParent-1 : indexInParent)
+			if (flag.substr(0,1)=='I') return zeroPad(flag, !useReverse ? siblings.length-indexInParent   : indexInParent+1)
 
 			return all
 		})
@@ -456,13 +496,7 @@ function showRegExHelpAlert(isSearch) {
 			,
 		buttons: ['OK', 'GitHub', 'Regexr.com'],
 		width: 430,
-		beforeShow: function (alert) {
-			var rawAlert = alert._v.alert()
-
-			var filePath = scriptPath+'Resources/icons/layerRenamerSelect.png'
-			var image = NSImage.alloc().initWithContentsOfFile(filePath)
-			rawAlert.setIcon(image)
-		}
+		icon:scriptPath+'Resources/icons/layerRenamerSelect.png'
 	})
 	if (msgAlert.canceled) return;
 	var link = msgAlert.selected.title == 'Regexr.com' ? 'http://regexr.com':