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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,329 @@ | ||
| /*can-view-scope@3.5.4#can-view-scope*/ | ||
| define([ | ||
| 'require', | ||
| 'exports', | ||
| 'module', | ||
| 'can-stache-key', | ||
| 'can-observation', | ||
| './template-context', | ||
| './compute_data', | ||
| 'can-util/js/assign', | ||
| 'can-util/js/each', | ||
| 'can-namespace', | ||
| 'can-reflect', | ||
| 'can-log/dev', | ||
| 'can-define-lazy-value' | ||
| ], function (require, exports, module) { | ||
| var observeReader = require('can-stache-key'); | ||
| var Observation = require('can-observation'); | ||
| var TemplateContext = require('./template-context'); | ||
| var makeComputeData = require('./compute_data'); | ||
| var assign = require('can-util/js/assign'); | ||
| var each = require('can-util/js/each'); | ||
| var namespace = require('can-namespace'); | ||
| var canReflect = require('can-reflect'); | ||
| var canLog = require('can-log/dev'); | ||
| var defineLazyValue = require('can-define-lazy-value'); | ||
| var specialKeywords = { | ||
| index: true, | ||
| key: true, | ||
| element: true, | ||
| event: true, | ||
| viewModel: true, | ||
| arguments: true | ||
| }; | ||
| function Scope(context, parent, meta) { | ||
| this._context = context; | ||
| this._parent = parent; | ||
| this._meta = meta || {}; | ||
| this.__cache = {}; | ||
| } | ||
| assign(Scope, { | ||
| read: observeReader.read, | ||
| Refs: TemplateContext, | ||
| refsScope: function () { | ||
| return new Scope(new TemplateContext()); | ||
| }, | ||
| keyInfo: function (attr) { | ||
| var info = {}; | ||
| info.isDotSlash = attr.substr(0, 2) === './'; | ||
| info.isThisDot = attr.substr(0, 5) === 'this.'; | ||
| info.isThisAt = attr.substr(0, 5) === 'this@'; | ||
| info.isInCurrentContext = info.isDotSlash || info.isThisDot || info.isThisAt; | ||
| info.isInParentContext = attr.substr(0, 3) === '../'; | ||
| info.isCurrentContext = attr === '.' || attr === 'this'; | ||
| info.isParentContext = attr === '..'; | ||
| info.isScope = attr === 'scope'; | ||
| info.isLegacyView = attr === '*self'; | ||
| info.isInLegacyRefsScope = info.isLegacyView || attr.substr(0, 1) === '*' || attr.substr(0, 2) === '@*'; | ||
| info.isInTemplateContextVars = info.isInLegacyRefsScope || attr.substr(0, 11) === 'scope.vars.'; | ||
| info.isInTemplateContext = info.isInTemplateContextVars || attr.substr(0, 6) === 'scope.'; | ||
| info.isContextBased = info.isInCurrentContext || info.isInParentContext || info.isCurrentContext || info.isParentContext; | ||
| return info; | ||
| } | ||
| }); | ||
| assign(Scope.prototype, { | ||
| add: function (context, meta) { | ||
| if (context !== this._context) { | ||
| return new this.constructor(context, this, meta); | ||
| } else { | ||
| return this; | ||
| } | ||
| }, | ||
| read: function (attr, options) { | ||
| if (attr === '%root') { | ||
| return { value: this.getRoot() }; | ||
| } | ||
| if (attr === '%scope') { | ||
| return { value: this }; | ||
| } | ||
| if (attr === './') { | ||
| attr = '.'; | ||
| } | ||
| var keyInfo = Scope.keyInfo(attr); | ||
| if (keyInfo.isContextBased && (this._meta.notContext || this._meta.special)) { | ||
| return this._parent.read(attr, options); | ||
| } | ||
| var currentScopeOnly; | ||
| if (keyInfo.isInCurrentContext) { | ||
| currentScopeOnly = true; | ||
| attr = keyInfo.isDotSlash ? attr.substr(2) : attr.substr(5); | ||
| } else if (keyInfo.isInParentContext || keyInfo.isParentContext) { | ||
| var parent = this._parent; | ||
| while (parent._meta.notContext || parent._meta.special) { | ||
| parent = parent._parent; | ||
| } | ||
| if (keyInfo.isParentContext) { | ||
| return observeReader.read(parent._context, [], options); | ||
| } | ||
| return parent.read(attr.substr(3) || '.', options); | ||
| } else if (keyInfo.isCurrentContext) { | ||
| return observeReader.read(this._context, [], options); | ||
| } else if (keyInfo.isScope) { | ||
| return { value: this }; | ||
| } | ||
| var keyReads = observeReader.reads(attr); | ||
| if (keyInfo.isInTemplateContext) { | ||
| if (keyInfo.isInLegacyRefsScope) { | ||
| } else { | ||
| keyReads = keyReads.slice(1); | ||
| } | ||
| if (specialKeywords[keyReads[0].key]) { | ||
| return this._read(keyReads, { special: true }); | ||
| } | ||
| if (keyReads.length === 1) { | ||
| return { value: this.templateContext[keyReads[0].key] }; | ||
| } | ||
| return this.getTemplateContext()._read(keyReads); | ||
| } | ||
| return this._read(keyReads, options, currentScopeOnly); | ||
| }, | ||
| _read: function (keyReads, options, currentScopeOnly) { | ||
| var currentScope = this, currentContext, undefinedObserves = [], currentObserve, currentReads, setObserveDepth = -1, currentSetReads, currentSetObserve, ignoreSpecialContexts, ignoreNonSpecialContexts, readOptions = assign({ | ||
| foundObservable: function (observe, nameIndex) { | ||
| currentObserve = observe; | ||
| currentReads = keyReads.slice(nameIndex); | ||
| }, | ||
| earlyExit: function (parentValue, nameIndex) { | ||
| if (nameIndex > setObserveDepth || nameIndex === setObserveDepth && (typeof parentValue === 'object' && keyReads[nameIndex].key in parentValue)) { | ||
| currentSetObserve = currentObserve; | ||
| currentSetReads = currentReads; | ||
| setObserveDepth = nameIndex; | ||
| } | ||
| } | ||
| }, options); | ||
| while (currentScope) { | ||
| currentContext = currentScope._context; | ||
| ignoreNonSpecialContexts = options && options.special && !currentScope._meta.special; | ||
| ignoreSpecialContexts = (!options || options.special !== true) && currentScope._meta.special; | ||
| if (currentContext !== null && (typeof currentContext === 'object' || typeof currentContext === 'function') && !ignoreNonSpecialContexts && !ignoreSpecialContexts) { | ||
| var getObserves = Observation.trap(); | ||
| var data = observeReader.read(currentContext, keyReads, readOptions); | ||
| var observes = getObserves(); | ||
| if (data.value !== undefined) { | ||
| Observation.addAll(observes); | ||
| return { | ||
| scope: currentScope, | ||
| rootObserve: currentObserve, | ||
| value: data.value, | ||
| reads: currentReads | ||
| }; | ||
| } else { | ||
| undefinedObserves.push.apply(undefinedObserves, observes); | ||
| } | ||
| } | ||
| if (currentScopeOnly) { | ||
| currentScope = null; | ||
| } else { | ||
| currentScope = currentScope._parent; | ||
| } | ||
| } | ||
| Observation.addAll(undefinedObserves); | ||
| return { | ||
| setRoot: currentSetObserve, | ||
| reads: currentSetReads, | ||
| value: undefined | ||
| }; | ||
| }, | ||
| get: function (key, options) { | ||
| options = assign({ isArgument: true }, options); | ||
| var res = this.read(key, options); | ||
| return res.value; | ||
| }, | ||
| peek: Observation.ignore(function (key, options) { | ||
| return this.get(key, options); | ||
| }), | ||
| peak: Observation.ignore(function (key, options) { | ||
| return this.peek(key, options); | ||
| }), | ||
| getScope: function (tester) { | ||
| var scope = this; | ||
| while (scope) { | ||
| if (tester(scope)) { | ||
| return scope; | ||
| } | ||
| scope = scope._parent; | ||
| } | ||
| }, | ||
| getContext: function (tester) { | ||
| var res = this.getScope(tester); | ||
| return res && res._context; | ||
| }, | ||
| getRefs: function () { | ||
| return this.getTemplateContext(); | ||
| }, | ||
| getTemplateContext: function () { | ||
| var lastScope; | ||
| var templateContext = this.getScope(function (scope) { | ||
| lastScope = scope; | ||
| return scope._context instanceof TemplateContext; | ||
| }); | ||
| if (!templateContext) { | ||
| templateContext = new Scope(new TemplateContext()); | ||
| lastScope._parent = templateContext; | ||
| } | ||
| return templateContext; | ||
| }, | ||
| getRoot: function () { | ||
| var cur = this, child = this; | ||
| while (cur._parent) { | ||
| child = cur; | ||
| cur = cur._parent; | ||
| } | ||
| if (cur._context instanceof Scope.Refs) { | ||
| cur = child; | ||
| } | ||
| return cur._context; | ||
| }, | ||
| set: function (key, value, options) { | ||
| options = options || {}; | ||
| var keyInfo = Scope.keyInfo(key), parent; | ||
| if (keyInfo.isCurrentContext) { | ||
| return canReflect.setValue(this._context, value); | ||
| } else if (keyInfo.isInParentContext || keyInfo.isParentContext) { | ||
| parent = this._parent; | ||
| while (parent._meta.notContext) { | ||
| parent = parent._parent; | ||
| } | ||
| if (keyInfo.isParentContext) { | ||
| return canReflect.setValue(parent._context, value); | ||
| } | ||
| return parent.set(key.substr(3) || '.', value, options); | ||
| } else if (keyInfo.isInTemplateContext) { | ||
| if (keyInfo.isInLegacyRefsScope) { | ||
| return this.vars.set(key.substr(1), value); | ||
| } | ||
| if (keyInfo.isInTemplateContextVars) { | ||
| return this.vars.set(key.substr(11), value); | ||
| } | ||
| key = key.substr(6); | ||
| if (key.indexOf('.') < 0) { | ||
| return this.templateContext[key] = value; | ||
| } | ||
| return this.getTemplateContext().set(key, value); | ||
| } | ||
| var dotIndex = key.lastIndexOf('.'), slashIndex = key.lastIndexOf('/'), contextPath, propName; | ||
| if (slashIndex > dotIndex) { | ||
| contextPath = key.substring(0, slashIndex); | ||
| propName = key.substring(slashIndex + 1, key.length); | ||
| } else { | ||
| if (dotIndex !== -1) { | ||
| contextPath = key.substring(0, dotIndex); | ||
| propName = key.substring(dotIndex + 1, key.length); | ||
| } else { | ||
| contextPath = '.'; | ||
| propName = key; | ||
| } | ||
| } | ||
| var context = this.read(contextPath, options).value; | ||
| if (context === undefined) { | ||
| return; | ||
| } | ||
| if (!canReflect.isObservableLike(context) && canReflect.isObservableLike(context[propName])) { | ||
| if (canReflect.isMapLike(context[propName])) { | ||
| canLog.warn('can-view-scope: Merging data into "' + propName + '" because its parent is non-observable'); | ||
| canReflect.updateDeep(context[propName], value); | ||
| } else if (canReflect.isValueLike(context[propName])) { | ||
| canReflect.setValue(context[propName], value); | ||
| } else { | ||
| observeReader.write(context, propName, value, options); | ||
| } | ||
| } else { | ||
| observeReader.write(context, propName, value, options); | ||
| } | ||
| }, | ||
| attr: Observation.ignore(function (key, value, options) { | ||
| canLog.warn('can-view-scope::attr is deprecated, please use peek, get or set'); | ||
| options = assign({ isArgument: true }, options); | ||
| if (arguments.length === 2) { | ||
| return this.set(key, value, options); | ||
| } else { | ||
| return this.get(key, options); | ||
| } | ||
| }), | ||
| computeData: function (key, options) { | ||
| return makeComputeData(this, key, options); | ||
| }, | ||
| compute: function (key, options) { | ||
| return this.computeData(key, options).compute; | ||
| }, | ||
| cloneFromRef: function () { | ||
| var contexts = []; | ||
| var scope = this, context, parent; | ||
| while (scope) { | ||
| context = scope._context; | ||
| if (context instanceof Scope.Refs) { | ||
| parent = scope._parent; | ||
| break; | ||
| } | ||
| contexts.unshift(context); | ||
| scope = scope._parent; | ||
| } | ||
| if (parent) { | ||
| each(contexts, function (context) { | ||
| parent = parent.add(context); | ||
| }); | ||
| return parent; | ||
| } else { | ||
| return this; | ||
| } | ||
| } | ||
| }); | ||
| defineLazyValue(Scope.prototype, 'templateContext', function () { | ||
| return this.getTemplateContext()._context; | ||
| }); | ||
| defineLazyValue(Scope.prototype, 'vars', function () { | ||
| return this.templateContext.vars; | ||
| }); | ||
| function Options(data, parent, meta) { | ||
| if (!data.helpers && !data.partials && !data.tags) { | ||
| data = { helpers: data }; | ||
| } | ||
| Scope.call(this, data, parent, meta); | ||
| } | ||
| Options.prototype = new Scope(); | ||
| Options.prototype.constructor = Options; | ||
| Scope.Options = Options; | ||
| namespace.view = namespace.view || {}; | ||
| module.exports = namespace.view.Scope = Scope; | ||
| }); |
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