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/**
* AccessibleBlockly
*
* Copyright 2016 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the 'License');
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an 'AS IS' BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Angular2 Component that details how a Blockly.Field is
* rendered in the toolbox in AccessibleBlockly. Also handles any interactions
* with the field.
* @author madeeha@google.com (Madeeha Ghori)
*/
blocklyApp.FieldComponent = ng.core
.Component({
selector: 'blockly-field',
template: `
<input *ngIf="isTextInput()" [id]="mainFieldId" type="text" [disabled]="disabled"
[ngModel]="field.getValue()" (ngModelChange)="field.setValue($event)"
[attr.aria-label]="disabled ? 'Disabled text field' : 'Press Enter to edit text'"
tabindex="-1">
<input *ngIf="isNumberInput()" [id]="mainFieldId" type="number" [disabled]="disabled"
[ngModel]="field.getValue()" (ngModelChange)="field.setValue($event)"
[attr.aria-label]="disabled ? 'Disabled number field' : 'Press Enter to edit number'"
tabindex="-1">
<div *ngIf="isDropdown()">
<label [id]="mainFieldId" [attr.aria-label]="('CURRENT_ARGUMENT_VALUE'|translate) + ' ' + field.getText() + ' Move right to view submenu'">
{{'CURRENT_ARGUMENT_VALUE'|translate}} {{field.getText()}}
</label>
<ol role="group">
<li [id]="idMap[optionValue]" role="treeitem" *ngFor="#optionValue of getOptions()"
[attr.aria-labelledBy]="generateAriaLabelledByAttr(idMap[optionValue + 'Button'], 'blockly-button')">
<button [id]="idMap[optionValue + 'Button']" (click)="handleDropdownChange(field, optionValue)"
[disabled]="disabled" tabindex="-1"
[attr.aria-label]="optionText[optionValue] + ' Press Enter to select this value'">
{{optionText[optionValue]}}
</button>
</li>
</ol>
</div>
<div *ngIf="isCheckbox()">
// Checkboxes are not currently supported.
</div>
<label [id]="mainFieldId" *ngIf="isTextField() && hasVisibleText()">
{{field.getText()}}
</label>
`,
inputs: ['field', 'index', 'parentId', 'disabled', 'mainFieldId'],
pipes: [blocklyApp.TranslatePipe]
})
.Class({
constructor: [blocklyApp.UtilsService, function(_utilsService) {
this.optionText = {
keys: []
};
this.utilsService = _utilsService;
}],
ngOnInit: function() {
var elementsNeedingIds = this.generateElementNames(this.field);
// Warning: this assumes that the elements returned by
// this.generateElementNames() are unique.
this.idMap = this.utilsService.generateIds(elementsNeedingIds);
},
generateAriaLabelledByAttr: function(mainLabel, secondLabel) {
return mainLabel + ' ' + secondLabel;
},
generateElementNames: function() {
var elementNames = [];
if (this.isDropdown()) {
var keys = this.getOptions();
for (var i = 0; i < keys.length; i++){
elementNames.push(keys[i], keys[i] + 'Button');
}
}
return elementNames;
},
isNumberInput: function() {
return this.field instanceof Blockly.FieldNumber;
},
isTextInput: function() {
return this.field instanceof Blockly.FieldTextInput &&
!(this.field instanceof Blockly.FieldNumber);
},
isDropdown: function() {
return this.field instanceof Blockly.FieldDropdown;
},
isCheckbox: function() {
return this.field instanceof Blockly.FieldCheckbox;
},
isTextField: function() {
return !(this.field instanceof Blockly.FieldTextInput) &&
!(this.field instanceof Blockly.FieldDropdown) &&
!(this.field instanceof Blockly.FieldCheckbox);
},
hasVisibleText: function() {
var text = this.field.getText().trim();
return !!text;
},
getOptions: function() {
if (this.optionText.keys.length) {
return this.optionText.keys;
}
var options = this.field.getOptions_();
for (var i = 0; i < options.length; i++) {
var tuple = options[i];
this.optionText[tuple[1]] = tuple[0];
this.optionText.keys.push(tuple[1]);
}
return this.optionText.keys;
},
handleDropdownChange: function(field, text) {
if (text == 'NO_ACTION') {
return;
}
if (this.field instanceof Blockly.FieldVariable) {
Blockly.FieldVariable.dropdownChange.call(this.field, text);
} else {
this.field.setValue(text);
}
}
});
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