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function getCtrlOnData(attr, element) { let onSyntax = attr.match(/^(.+)(\s+on\s+)(.+)?/); if (onSyntax && onSyntax.length === 4) { window.console.log('Angular ui-scroll adapter assignment warning. "Controller On" syntax has been deprecated since ui-scroll v1.6.1.'); let ctrl = onSyntax[3]; let tail = onSyntax[1]; let candidate = element; while (candidate.length) { let candidateScope = candidate.scope(); // doesn't work when debugInfoEnabled flag = true let candidateName = (candidate.attr('ng-controller') \|\| '').match(/(\w(?:\w\|\d))(?:\s+as\s+(\w(?:\w\|\d)))?/); if (candidateName && candidateName[1] === ctrl) { return { target: candidateScope, source: tail }; } candidate = candidate.parent(); } throw new Error('Angular ui-scroll adapter assignment error. Failed to locate target controller "' + ctrl + '" to inject "' + tail + '"'); } } class Adapter { constructor(viewport, buffer, adjustBuffer, reload, $attr, $parse, element, $scope) { this.viewport = viewport; this.buffer = buffer; this.adjustBuffer = adjustBuffer; this.reload = reload; this.isLoading = false; this.disabled = false; const viewportScope = viewport.getScope(); this.startScope = viewportScope.$parent ? viewportScope : $scope; this.publicContext = {}; this.assignAdapter($attr.adapter, $parse, element); this.generatePublicContext($attr, $parse); } assignAdapter(adapterAttr, $parse, element) { if (!adapterAttr \|\| !(adapterAttr = adapterAttr.replace(/^\s+\|\s+$/gm, ''))) { return; } let ctrlOnData = getCtrlOnData(adapterAttr, element); let adapterOnScope; try { if (ctrlOnData) { // "Controller On", deprecated since v1.6.1 $parse(ctrlOnData.source).assign(ctrlOnData.target, {}); adapterOnScope = $parse(ctrlOnData.source)(ctrlOnData.target); } else { $parse(adapterAttr).assign(this.startScope, {}); adapterOnScope = $parse(adapterAttr)(this.startScope); } } catch (error) { error.message = `Angular ui-scroll Adapter assignment exception.\n` + `Can't parse "${adapterAttr}" expression.\n` + error.message; throw error; } angular.extend(adapterOnScope, this.publicContext); this.publicContext = adapterOnScope; } generatePublicContext($attr, $parse) { // these methods will be accessible out of ui-scroll via user defined adapter const publicMethods = ['reload', 'applyUpdates', 'append', 'prepend', 'isBOF', 'isEOF', 'isEmpty']; for (let i = publicMethods.length - 1; i >= 0; i--) { this.publicContext[publicMethods[i]] = this[publicMethods[i]].bind(this); } // these read-only props will be accessible out of ui-scroll via user defined adapter const publicProps = ['isLoading', 'topVisible', 'topVisibleElement', 'topVisibleScope']; for (let i = publicProps.length - 1; i >= 0; i--) { let property, attr = $attr[publicProps[i]]; Object.defineProperty(this, publicProps[i], { get: () => property, set: (value) => { property = value; this.publicContext[publicProps[i]] = value; if (attr) { $parse(attr).assign(this.startScope, value); } } }); } // non-read-only public property Object.defineProperty(this.publicContext, 'disabled', { get: () => this.disabled, set: (value) => (!(this.disabled = value)) ? this.adjustBuffer() : null }); } loading(value) { this['isLoading'] = value; } isBOF() { return this.buffer.bof; } isEOF() { return this.buffer.eof; } isEmpty() { return !this.buffer.length; } applyUpdates(arg1, arg2) { if (angular.isFunction(arg1)) { // arg1 is the updater function, arg2 is ignored this.buffer.slice(0).forEach((wrapper) => { // we need to do it on the buffer clone, because buffer content // may change as we iterate through this.applyUpdate(wrapper, arg1(wrapper.item, wrapper.scope, wrapper.element)); }); } else { // arg1 is item index, arg2 is the newItems array if (arg1 % 1 !== 0) {// checking if it is an integer throw new Error('applyUpdates - ' + arg1 + ' is not a valid index'); } const index = arg1 - this.buffer.first; if ((index >= 0 && index < this.buffer.length)) { this.applyUpdate(this.buffer[index], arg2); } } this.adjustBuffer(); } append(newItems) { this.buffer.append(newItems); this.adjustBuffer(); } prepend(newItems) { this.buffer.prepend(newItems); this.adjustBuffer(); } calculateProperties() { let item, itemHeight, itemTop, isNewRow, rowTop = null; let topHeight = 0; for (let i = 0; i < this.buffer.length; i++) { item = this.buffer[i]; itemTop = item.element.offset().top; isNewRow = rowTop !== itemTop; rowTop = itemTop; if (isNewRow) { itemHeight = item.element.outerHeight(true); } if (isNewRow && (this.viewport.topDataPos() + topHeight + itemHeight <= this.viewport.topVisiblePos())) { topHeight += itemHeight; } else { if (isNewRow) { this['topVisible'] = item.item; this['topVisibleElement'] = item.element; this['topVisibleScope'] = item.scope; } break; } } } applyUpdate(wrapper, newItems) { if (!angular.isArray(newItems)) { return; } let keepIt; let pos = (this.buffer.indexOf(wrapper)) + 1; newItems.reverse().forEach((newItem) => { if (newItem === wrapper.item) { keepIt = true; pos--; } else { this.buffer.insert(pos, newItem); } }); if (!keepIt) { wrapper.op = 'remove'; } } } export default Adapter;

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