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Additional template renderer helpers (#699)

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* Add spread function

* Add generic operator evaluation function

* Add variable get/set/scope functions

* Add isMoraPitchHigh function
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toasted-nutbread 2020-07-31 16:17:58 -04:00 committed by GitHub
parent 736d3c892e
commit f1e7288c11
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 125 additions and 2 deletions
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125
ext/bg/js/template-renderer.js
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@ -25,6 +25,7 @@ class TemplateRenderer {
this._cache = new Map();
this._cacheMaxSize = 5;
this._helpersRegistered = false;
this._stateStack = null;
}
async render(template, data) {
@ -41,7 +42,12 @@ class TemplateRenderer {
cache.set(template, instance);
}
try {
this._stateStack = [new Map()];
return instance(data).trim();
} finally {
this._stateStack = null;
}
}
// Private
@ -70,7 +76,13 @@ class TemplateRenderer {
['regexReplace', this._regexReplace.bind(this)],
['regexMatch', this._regexMatch.bind(this)],
['mergeTags', this._mergeTags.bind(this)],
['eachUpTo', this._eachUpTo.bind(this)]
['eachUpTo', this._eachUpTo.bind(this)],
['spread', this._spread.bind(this)],
['op', this._op.bind(this)],
['get', this._get.bind(this)],
['set', this._set.bind(this)],
['scope', this._scope.bind(this)],
['isMoraPitchHigh', this._isMoraPitchHigh.bind(this)]
];
for (const [name, helper] of helpers) {
@ -224,4 +236,115 @@ class TemplateRenderer {
}
return options.inverse(context);
}
_spread(context, ...args) {
const result = [];
for (let i = 0, ii = args.length - 1; i < ii; ++i) {
try {
result.push(...args[i]);
} catch (e) {
// NOP
}
}
return result;
}
_op(context, ...args) {
switch (args.length) {
case 3: return this._evaluateUnaryExpression(args[0], args[1]);
case 4: return this._evaluateBinaryExpression(args[0], args[1], args[2]);
case 5: return this._evaluateTernaryExpression(args[0], args[1], args[2], args[3]);
default: return void 0;
}
}
_evaluateUnaryExpression(operator, operand1) {
switch (operator) {
case '+': return +operand1;
case '-': return -operand1;
case '~': return ~operand1;
case '!': return !operand1;
default: return void 0;
}
}
_evaluateBinaryExpression(operator, operand1, operand2) {
switch (operator) {
case '+': return operand1 + operand2;
case '-': return operand1 - operand2;
case '/': return operand1 / operand2;
case '*': return operand1 * operand2;
case '%': return operand1 % operand2;
case '**': return operand1 ** operand2;
case '==': return operand1 == operand2; // eslint-disable-line eqeqeq
case '!=': return operand1 != operand2; // eslint-disable-line eqeqeq
case '===': return operand1 === operand2;
case '!==': return operand1 !== operand2;
case '<': return operand1 < operand2;
case '<=': return operand1 <= operand2;
case '>': return operand1 > operand2;
case '>=': return operand1 >= operand2;
case '<<': return operand1 << operand2;
case '>>': return operand1 >> operand2;
case '>>>': return operand1 >>> operand2;
case '&': return operand1 & operand2;
case '|': return operand1 | operand2;
case '^': return operand1 ^ operand2;
case '&&': return operand1 && operand2;
case '||': return operand1 || operand2;
default: return void 0;
}
}
_evaluateTernaryExpression(operator, operand1, operand2, operand3) {
switch (operator) {
case '?:': return operand1 ? operand2 : operand3;
default: return void 0;
}
}
_get(context, key) {
for (let i = this._stateStack.length; --i >= 0;) {
const map = this._stateStack[i];
if (map.has(key)) {
return map.get(key);
}
}
return void 0;
}
_set(context, ...args) {
switch (args.length) {
case 2:
{
const [key, options] = args;
const value = options.fn(context);
this._stateStack[this._stateStack.length - 1].set(key, value);
return value;
}
case 3:
{
const [key, value] = args;
this._stateStack[this._stateStack.length - 1].set(key, value);
return value;
}
default:
return void 0;
}
}
_scope(context, options) {
try {
this._stateStack.push(new Map());
return options.fn(context);
} finally {
if (this._stateStack.length > 1) {
this._stateStack.pop();
}
}
}
_isMoraPitchHigh(context, position, index) {
return jp.isMoraPitchHigh(index, position);
}
}