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authortoasted-nutbread <toasted-nutbread@users.noreply.github.com>2020-07-31 16:17:58 -0400
committerGitHub <noreply@github.com>2020-07-31 16:17:58 -0400
commitf1e7288c11db2ef615696f90d12f2e028a215998 (patch)
tree12a3ab9c6eb101501ffe695d5a7e3b3046a826d9 /ext/bg/js/template-renderer.js
parent736d3c892ecb31b6aa658b0d8b0c5be757258062 (diff)
Additional template renderer helpers (#699)
* Add spread function * Add generic operator evaluation function * Add variable get/set/scope functions * Add isMoraPitchHigh function
Diffstat (limited to 'ext/bg/js/template-renderer.js')
-rw-r--r--ext/bg/js/template-renderer.js127
1 files changed, 125 insertions, 2 deletions
diff --git a/ext/bg/js/template-renderer.js b/ext/bg/js/template-renderer.js
index f6c4374b..ef05cbd8 100644
--- a/ext/bg/js/template-renderer.js
+++ b/ext/bg/js/template-renderer.js
@@ -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);
}
- return instance(data).trim();
+ 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);
+ }
}