minor refactoring + docs...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

ui (gen4)/features/keyboard.js

@@ -28,8 +28,9 @@ var drawer = require('lib/widget/drawer')
 // helper...
 function customScale(n){
 	return {
-		default: 'fitCustom: '+n,
-		'ctrl+shift': 'setCustomSize: '+n,
+		default: 'fitCustom: '+n+' -- Set cutom image size',
+		'alt': 'setCustomSize: '+n+' -- Set current image size as custom',
+		'ctrl+shift': 'setCustomSize: '+n+' null -- Clear custom image size',
 	}
 }
 
@@ -80,14 +81,18 @@ module.GLOBAL_KEYBOARD = {
 			'#0', '#1', '#2', '#3', '#4', '#5', '#6', '#7', '#8', '#9',
 		],
 
+
+		// zooming...
 		'#1': 'fitScreen',
 		'#2': {
 			default: 'fitNormal',
-			'ctrl+shift': 'setNormalScale',
+			'alt': 'setNormalScale',
+			'ctrl+shift': 'setNormalScale: null -- Reset normal size to default',
 		},
 		'#3': {
 			default: 'fitSmall',
-			'ctrl+shift': 'setSmallScale',
+			'alt': 'setSmallScale',
+			'ctrl+shift': 'setSmallScale: null -- Reset small size to default',
 		},
 		'#4': customScale(4),
 		'#5': customScale(5),

ui (gen4)/features/ui-single-image.js

@@ -253,12 +253,16 @@ var SingleImageActions = actions.Actions({
 	// basic single image view sizing...
 	fitSmall: ['Zoom/Show small image',
 		function(){ this.screenfit = this.config['fit-small-scale'] || 4 }],
+	setSmallScale: ['Zoom/Set small size to current',
+		function(value){ 
+			this.config['fit-small-scale']
+				= value === null ? 4 : (value || this.screenfit) }],
 	fitNormal: ['Zoom/Show normal image',
 		function(){ this.screenfit = this.config['fit-normal-scale'] || 1.2 }],
-	setSmallScale: ['Zoom/Set small size to current',
-		function(){ this.config['fit-small-scale'] = this.screenfit }],
 	setNormalScale: ['Zoom/Set normal size to current',
-		function(){ this.config['fit-normal-scale'] = this.screenfit }],
+		function(value){ 
+			this.config['fit-normal-scale'] 
+				= value === null ? 1.2 : (value || this.screenfit) }],
 	
 	fitCustom: ['- Zoom/Show cusotm size image',
 		function(n){
@@ -275,16 +279,29 @@ var SingleImageActions = actions.Actions({
 			this.screenfit = s
 		}],
 	setCustomSize: ['- Zoom/Set image cusotm size',
-		function(n){
+		function(n, value){
 			if(n == null){
 				return
 			}
 
-			var sizes = this.config['fit-custom-scale'] || {}
-			sizes[n] = this.screenfit
+			var sizes = this.config['fit-custom-scale']
+
+			// reset...
+			if(value === null){
+				if(sizes && n in sizes){
+					delete sizes[n]
+				}
+
+			// set...
+			} else {
+				sizes = sizes && JSON.parse(JSON.stringify(sizes)) || {}
+				sizes[n] = value || this.screenfit
+			}
 
 			// NOTE: we are resetting this for it to be stored correctly...
-			this.config['fit-custom-scale'] = sizes
+			if(sizes){
+				this.config['fit-custom-scale'] = sizes
+			}
 		}],
 })
 

ui (gen4)/lib/keyboard.js

@@ -249,7 +249,7 @@ function parseActionCall(txt){
 	// parse arguments...
 	var args = JSON.parse('['+(
 		((c[1] || '')
-			.match(/"[^"]*"|'[^']*'|\{[^\}]*\}|\[[^\]]*\]|\d+|\d+\.\d*/gm) 
+			.match(/"[^"]*"|'[^']*'|\{[^\}]*\}|\[[^\]]*\]|\d+|\d+\.\d*|null/gm) 
 		|| [])
 		.join(','))+']')