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feat(ionContent): use child scope instead of isolate scope
Adds new '$ionicBind' service, which takes an object containing binding definitions (similar to angular directive isolate scope definition). Allows binding of any directive attribute & expressions from a scope, letting us do normal attribute -> scope binding without having to create isolate scopes. Closes #555. Closes #669
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| angular.module('ionic.service.bind', []) | ||
| .factory('$ionicBind', ['$parse', '$interpolate', function($parse, $interpolate) { | ||
| var LOCAL_REGEXP = /^\s*([@=&])(\??)\s*(\w*)\s*$/; | ||
| return function(scope, attrs, bindDefinition) { | ||
| angular.forEach(bindDefinition || {}, function (definition, scopeName) { | ||
| //Adapted from angular.js $compile | ||
| var match = definition.match(LOCAL_REGEXP) || [], | ||
| attrName = match[3] || scopeName, | ||
| mode = match[1], // @, =, or & | ||
| parentGet, | ||
| unwatch; | ||
|
|
||
| switch(mode) { | ||
| case '@': | ||
| if (!attrs[attrName]) { | ||
| return; | ||
| } | ||
| attrs.$observe(attrName, function(value) { | ||
| scope[scopeName] = value; | ||
| }); | ||
| // we trigger an interpolation to ensure | ||
| // the value is there for use immediately | ||
| if (attrs[attrName]) { | ||
| scope[scopeName] = $interpolate(attrs[attrName])(scope); | ||
| } | ||
| break; | ||
|
|
||
| case '=': | ||
| if (!attrs[attrName]) { | ||
| return; | ||
| } | ||
| unwatch = scope.$watch(attrs[attrName], function(value) { | ||
| scope[scopeName] = value; | ||
| }); | ||
| //Destroy parent scope watcher when this scope is destroyed | ||
| scope.$on('$destroy', unwatch); | ||
| break; | ||
|
|
||
| case '&': | ||
| /* jshint -W044 */ | ||
| if (attrs[attrName] && attrs[attrName].match(RegExp(scopeName + '\(.*?\)'))) { | ||
| throw new Error('& expression binding "' + scopeName + '" looks like it will recursively call "' + | ||
| attrs[attrName] + '" and cause a stack overflow! Please choose a different scopeName.'); | ||
| } | ||
| parentGet = $parse(attrs[attrName]); | ||
| scope[scopeName] = function(locals) { | ||
| return parentGet(scope, locals); | ||
| }; | ||
| break; | ||
| } | ||
| }); | ||
| }; | ||
| }]); |
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