angular2
Version:
Angular 2 - a web framework for modern web apps
155 lines • 30.9 kB
JavaScript
import * as o from '../output/output_ast';
import { Identifiers } from '../identifiers';
import { DetectChangesVars } from './constants';
import { PropertyBindingType } from '../template_ast';
import { isBlank, isPresent } from 'angular2/src/facade/lang';
import { LifecycleHooks } from 'angular2/src/core/metadata/lifecycle_hooks';
import { isDefaultChangeDetectionStrategy } from 'angular2/src/core/change_detection/constants';
import { camelCaseToDashCase } from '../util';
import { convertCdExpressionToIr } from './expression_converter';
import { CompileBinding } from './compile_binding';
function createBindFieldExpr(exprIndex) {
return o.THIS_EXPR.prop(`_expr_${exprIndex}`);
}
function createCurrValueExpr(exprIndex) {
return o.variable(`currVal_${exprIndex}`);
}
function bind(view, currValExpr, fieldExpr, parsedExpression, context, actions, method) {
var checkExpression = convertCdExpressionToIr(view, context, parsedExpression, DetectChangesVars.valUnwrapper);
if (isBlank(checkExpression.expression)) {
// e.g. an empty expression was given
return;
}
view.fields.push(new o.ClassField(fieldExpr.name, null, [o.StmtModifier.Private]));
view.createMethod.addStmt(o.THIS_EXPR.prop(fieldExpr.name).set(o.importExpr(Identifiers.uninitialized)).toStmt());
if (checkExpression.needsValueUnwrapper) {
var initValueUnwrapperStmt = DetectChangesVars.valUnwrapper.callMethod('reset', []).toStmt();
method.addStmt(initValueUnwrapperStmt);
}
method.addStmt(currValExpr.set(checkExpression.expression).toDeclStmt(null, [o.StmtModifier.Final]));
var condition = o.importExpr(Identifiers.checkBinding)
.callFn([DetectChangesVars.throwOnChange, fieldExpr, currValExpr]);
if (checkExpression.needsValueUnwrapper) {
condition = DetectChangesVars.valUnwrapper.prop('hasWrappedValue').or(condition);
}
method.addStmt(new o.IfStmt(condition, actions.concat([o.THIS_EXPR.prop(fieldExpr.name).set(currValExpr).toStmt()])));
}
export function bindRenderText(boundText, compileNode, view) {
var bindingIndex = view.bindings.length;
view.bindings.push(new CompileBinding(compileNode, boundText));
var currValExpr = createCurrValueExpr(bindingIndex);
var valueField = createBindFieldExpr(bindingIndex);
view.detectChangesRenderPropertiesMethod.resetDebugInfo(compileNode.nodeIndex, boundText);
bind(view, currValExpr, valueField, boundText.value, o.THIS_EXPR.prop('context'), [
o.THIS_EXPR.prop('renderer')
.callMethod('setText', [compileNode.renderNode, currValExpr])
.toStmt()
], view.detectChangesRenderPropertiesMethod);
}
function bindAndWriteToRenderer(boundProps, context, compileElement) {
var view = compileElement.view;
var renderNode = compileElement.renderNode;
boundProps.forEach((boundProp) => {
var bindingIndex = view.bindings.length;
view.bindings.push(new CompileBinding(compileElement, boundProp));
view.detectChangesRenderPropertiesMethod.resetDebugInfo(compileElement.nodeIndex, boundProp);
var fieldExpr = createBindFieldExpr(bindingIndex);
var currValExpr = createCurrValueExpr(bindingIndex);
var renderMethod;
var renderValue = currValExpr;
var updateStmts = [];
switch (boundProp.type) {
case PropertyBindingType.Property:
renderMethod = 'setElementProperty';
if (view.genConfig.logBindingUpdate) {
updateStmts.push(logBindingUpdateStmt(renderNode, boundProp.name, currValExpr));
}
break;
case PropertyBindingType.Attribute:
renderMethod = 'setElementAttribute';
renderValue =
renderValue.isBlank().conditional(o.NULL_EXPR, renderValue.callMethod('toString', []));
break;
case PropertyBindingType.Class:
renderMethod = 'setElementClass';
break;
case PropertyBindingType.Style:
renderMethod = 'setElementStyle';
var strValue = renderValue.callMethod('toString', []);
if (isPresent(boundProp.unit)) {
strValue = strValue.plus(o.literal(boundProp.unit));
}
renderValue = renderValue.isBlank().conditional(o.NULL_EXPR, strValue);
break;
}
updateStmts.push(o.THIS_EXPR.prop('renderer')
.callMethod(renderMethod, [renderNode, o.literal(boundProp.name), renderValue])
.toStmt());
bind(view, currValExpr, fieldExpr, boundProp.value, context, updateStmts, view.detectChangesRenderPropertiesMethod);
});
}
export function bindRenderInputs(boundProps, compileElement) {
bindAndWriteToRenderer(boundProps, o.THIS_EXPR.prop('context'), compileElement);
}
export function bindDirectiveHostProps(directiveAst, directiveInstance, compileElement) {
bindAndWriteToRenderer(directiveAst.hostProperties, directiveInstance, compileElement);
}
export function bindDirectiveInputs(directiveAst, directiveInstance, compileElement) {
if (directiveAst.inputs.length === 0) {
return;
}
var view = compileElement.view;
var detectChangesInInputsMethod = view.detectChangesInInputsMethod;
detectChangesInInputsMethod.resetDebugInfo(compileElement.nodeIndex, compileElement.sourceAst);
var lifecycleHooks = directiveAst.directive.lifecycleHooks;
var calcChangesMap = lifecycleHooks.indexOf(LifecycleHooks.OnChanges) !== -1;
var isOnPushComp = directiveAst.directive.isComponent &&
!isDefaultChangeDetectionStrategy(directiveAst.directive.changeDetection);
if (calcChangesMap) {
detectChangesInInputsMethod.addStmt(DetectChangesVars.changes.set(o.NULL_EXPR).toStmt());
}
if (isOnPushComp) {
detectChangesInInputsMethod.addStmt(DetectChangesVars.changed.set(o.literal(false)).toStmt());
}
directiveAst.inputs.forEach((input) => {
var bindingIndex = view.bindings.length;
view.bindings.push(new CompileBinding(compileElement, input));
detectChangesInInputsMethod.resetDebugInfo(compileElement.nodeIndex, input);
var fieldExpr = createBindFieldExpr(bindingIndex);
var currValExpr = createCurrValueExpr(bindingIndex);
var statements = [directiveInstance.prop(input.directiveName).set(currValExpr).toStmt()];
if (calcChangesMap) {
statements.push(new o.IfStmt(DetectChangesVars.changes.identical(o.NULL_EXPR), [
DetectChangesVars.changes.set(o.literalMap([], new o.MapType(o.importType(Identifiers.SimpleChange))))
.toStmt()
]));
statements.push(DetectChangesVars.changes.key(o.literal(input.directiveName))
.set(o.importExpr(Identifiers.SimpleChange).instantiate([fieldExpr, currValExpr]))
.toStmt());
}
if (isOnPushComp) {
statements.push(DetectChangesVars.changed.set(o.literal(true)).toStmt());
}
if (view.genConfig.logBindingUpdate) {
statements.push(logBindingUpdateStmt(compileElement.renderNode, input.directiveName, currValExpr));
}
bind(view, currValExpr, fieldExpr, input.value, o.THIS_EXPR.prop('context'), statements, detectChangesInInputsMethod);
});
if (isOnPushComp) {
detectChangesInInputsMethod.addStmt(new o.IfStmt(DetectChangesVars.changed, [
compileElement.appElement.prop('componentView')
.callMethod('markAsCheckOnce', [])
.toStmt()
]));
}
}
function logBindingUpdateStmt(renderNode, propName, value) {
return o.THIS_EXPR.prop('renderer')
.callMethod('setBindingDebugInfo', [
renderNode,
o.literal(`ng-reflect-${camelCaseToDashCase(propName)}`),
value.isBlank().conditional(o.NULL_EXPR, value.callMethod('toString', []))
])
.toStmt();
}
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* as cdAst from '../expression_parser/ast';\nimport * as o from '../output/output_ast';\nimport {Identifiers} from '../identifiers';\nimport {DetectChangesVars} from './constants';\n\nimport {\n  BoundTextAst,\n  BoundElementPropertyAst,\n  DirectiveAst,\n  PropertyBindingType,\n  TemplateAst\n} from '../template_ast';\n\nimport {isBlank, isPresent, isArray, CONST_EXPR} from 'angular2/src/facade/lang';\n\nimport {CompileView} from './compile_view';\nimport {CompileElement, CompileNode} from './compile_element';\nimport {CompileMethod} from './compile_method';\n\nimport {LifecycleHooks} from 'angular2/src/core/metadata/lifecycle_hooks';\nimport {isDefaultChangeDetectionStrategy} from 'angular2/src/core/change_detection/constants';\nimport {camelCaseToDashCase} from '../util';\n\nimport {convertCdExpressionToIr} from './expression_converter';\n\nimport {CompileBinding} from './compile_binding';\n\nfunction createBindFieldExpr(exprIndex: number): o.ReadPropExpr {\n  return o.THIS_EXPR.prop(`_expr_${exprIndex}`);\n}\n\nfunction createCurrValueExpr(exprIndex: number): o.ReadVarExpr {\n  return o.variable(`currVal_${exprIndex}`);\n}\n\nfunction bind(view: CompileView, currValExpr: o.ReadVarExpr, fieldExpr: o.ReadPropExpr,\n              parsedExpression: cdAst.AST, context: o.Expression, actions: o.Statement[],\n              method: CompileMethod) {\n  var checkExpression =\n      convertCdExpressionToIr(view, context, parsedExpression, DetectChangesVars.valUnwrapper);\n  if (isBlank(checkExpression.expression)) {\n    // e.g. an empty expression was given\n    return;\n  }\n\n  view.fields.push(new o.ClassField(fieldExpr.name, null, [o.StmtModifier.Private]));\n  view.createMethod.addStmt(\n      o.THIS_EXPR.prop(fieldExpr.name).set(o.importExpr(Identifiers.uninitialized)).toStmt());\n\n  if (checkExpression.needsValueUnwrapper) {\n    var initValueUnwrapperStmt = DetectChangesVars.valUnwrapper.callMethod('reset', []).toStmt();\n    method.addStmt(initValueUnwrapperStmt);\n  }\n  method.addStmt(\n      currValExpr.set(checkExpression.expression).toDeclStmt(null, [o.StmtModifier.Final]));\n\n  var condition: o.Expression =\n      o.importExpr(Identifiers.checkBinding)\n          .callFn([DetectChangesVars.throwOnChange, fieldExpr, currValExpr]);\n  if (checkExpression.needsValueUnwrapper) {\n    condition = DetectChangesVars.valUnwrapper.prop('hasWrappedValue').or(condition);\n  }\n  method.addStmt(new o.IfStmt(\n      condition,\n      actions.concat([<o.Statement>o.THIS_EXPR.prop(fieldExpr.name).set(currValExpr).toStmt()])));\n}\n\nexport function bindRenderText(boundText: BoundTextAst, compileNode: CompileNode,\n                               view: CompileView) {\n  var bindingIndex = view.bindings.length;\n  view.bindings.push(new CompileBinding(compileNode, boundText));\n  var currValExpr = createCurrValueExpr(bindingIndex);\n  var valueField = createBindFieldExpr(bindingIndex);\n  view.detectChangesRenderPropertiesMethod.resetDebugInfo(compileNode.nodeIndex, boundText);\n\n  bind(view, currValExpr, valueField, boundText.value, o.THIS_EXPR.prop('context'),\n       [\n         o.THIS_EXPR.prop('renderer')\n             .callMethod('setText', [compileNode.renderNode, currValExpr])\n             .toStmt()\n       ],\n       view.detectChangesRenderPropertiesMethod);\n}\n\nfunction bindAndWriteToRenderer(boundProps: BoundElementPropertyAst[], context: o.Expression,\n                                compileElement: CompileElement) {\n  var view = compileElement.view;\n  var renderNode = compileElement.renderNode;\n  boundProps.forEach((boundProp) => {\n    var bindingIndex = view.bindings.length;\n    view.bindings.push(new CompileBinding(compileElement, boundProp));\n    view.detectChangesRenderPropertiesMethod.resetDebugInfo(compileElement.nodeIndex, boundProp);\n    var fieldExpr = createBindFieldExpr(bindingIndex);\n    var currValExpr = createCurrValueExpr(bindingIndex);\n    var renderMethod: string;\n    var renderValue: o.Expression = currValExpr;\n    var updateStmts = [];\n    switch (boundProp.type) {\n      case PropertyBindingType.Property:\n        renderMethod = 'setElementProperty';\n        if (view.genConfig.logBindingUpdate) {\n          updateStmts.push(logBindingUpdateStmt(renderNode, boundProp.name, currValExpr));\n        }\n        break;\n      case PropertyBindingType.Attribute:\n        renderMethod = 'setElementAttribute';\n        renderValue =\n            renderValue.isBlank().conditional(o.NULL_EXPR, renderValue.callMethod('toString', []));\n        break;\n      case PropertyBindingType.Class:\n        renderMethod = 'setElementClass';\n        break;\n      case PropertyBindingType.Style:\n        renderMethod = 'setElementStyle';\n        var strValue: o.Expression = renderValue.callMethod('toString', []);\n        if (isPresent(boundProp.unit)) {\n          strValue = strValue.plus(o.literal(boundProp.unit));\n        }\n        renderValue = renderValue.isBlank().conditional(o.NULL_EXPR, strValue);\n        break;\n    }\n    updateStmts.push(\n        o.THIS_EXPR.prop('renderer')\n            .callMethod(renderMethod, [renderNode, o.literal(boundProp.name), renderValue])\n            .toStmt());\n\n    bind(view, currValExpr, fieldExpr, boundProp.value, context, updateStmts,\n         view.detectChangesRenderPropertiesMethod);\n  });\n}\n\nexport function bindRenderInputs(boundProps: BoundElementPropertyAst[],\n                                 compileElement: CompileElement): void {\n  bindAndWriteToRenderer(boundProps, o.THIS_EXPR.prop('context'), compileElement);\n}\n\nexport function bindDirectiveHostProps(directiveAst: DirectiveAst, directiveInstance: o.Expression,\n                                       compileElement: CompileElement): void {\n  bindAndWriteToRenderer(directiveAst.hostProperties, directiveInstance, compileElement);\n}\n\nexport function bindDirectiveInputs(directiveAst: DirectiveAst, directiveInstance: o.Expression,\n                                    compileElement: CompileElement) {\n  if (directiveAst.inputs.length === 0) {\n    return;\n  }\n  var view = compileElement.view;\n  var detectChangesInInputsMethod = view.detectChangesInInputsMethod;\n  detectChangesInInputsMethod.resetDebugInfo(compileElement.nodeIndex, compileElement.sourceAst);\n\n  var lifecycleHooks = directiveAst.directive.lifecycleHooks;\n  var calcChangesMap = lifecycleHooks.indexOf(LifecycleHooks.OnChanges) !== -1;\n  var isOnPushComp = directiveAst.directive.isComponent &&\n                     !isDefaultChangeDetectionStrategy(directiveAst.directive.changeDetection);\n  if (calcChangesMap) {\n    detectChangesInInputsMethod.addStmt(DetectChangesVars.changes.set(o.NULL_EXPR).toStmt());\n  }\n  if (isOnPushComp) {\n    detectChangesInInputsMethod.addStmt(DetectChangesVars.changed.set(o.literal(false)).toStmt());\n  }\n  directiveAst.inputs.forEach((input) => {\n    var bindingIndex = view.bindings.length;\n    view.bindings.push(new CompileBinding(compileElement, input));\n    detectChangesInInputsMethod.resetDebugInfo(compileElement.nodeIndex, input);\n    var fieldExpr = createBindFieldExpr(bindingIndex);\n    var currValExpr = createCurrValueExpr(bindingIndex);\n    var statements: o.Statement[] =\n        [directiveInstance.prop(input.directiveName).set(currValExpr).toStmt()];\n    if (calcChangesMap) {\n      statements.push(new o.IfStmt(DetectChangesVars.changes.identical(o.NULL_EXPR), [\n        DetectChangesVars.changes.set(o.literalMap([], new o.MapType(\n                                                           o.importType(Identifiers.SimpleChange))))\n            .toStmt()\n      ]));\n      statements.push(\n          DetectChangesVars.changes.key(o.literal(input.directiveName))\n              .set(o.importExpr(Identifiers.SimpleChange).instantiate([fieldExpr, currValExpr]))\n              .toStmt());\n    }\n    if (isOnPushComp) {\n      statements.push(DetectChangesVars.changed.set(o.literal(true)).toStmt());\n    }\n    if (view.genConfig.logBindingUpdate) {\n      statements.push(\n          logBindingUpdateStmt(compileElement.renderNode, input.directiveName, currValExpr));\n    }\n    bind(view, currValExpr, fieldExpr, input.value, o.THIS_EXPR.prop('context'), statements,\n         detectChangesInInputsMethod);\n  });\n  if (isOnPushComp) {\n    detectChangesInInputsMethod.addStmt(new o.IfStmt(DetectChangesVars.changed, [\n      compileElement.appElement.prop('componentView')\n          .callMethod('markAsCheckOnce', [])\n          .toStmt()\n    ]));\n  }\n}\n\nfunction logBindingUpdateStmt(renderNode: o.Expression, propName: string,\n                              value: o.Expression): o.Statement {\n  return o.THIS_EXPR.prop('renderer')\n      .callMethod('setBindingDebugInfo',\n                  [\n                    renderNode,\n                    o.literal(`ng-reflect-${camelCaseToDashCase(propName)}`),\n                    value.isBlank().conditional(o.NULL_EXPR, value.callMethod('toString', []))\n                  ])\n      .toStmt();\n}\n"]}