@glimmer/runtime
Version:
Minimal runtime needed to render Glimmer templates
486 lines (402 loc) • 42.4 kB
JavaScript
import { DEBUG } from '@glimmer/env';
import { createDebugAliasRef, UNDEFINED_REFERENCE, valueForRef } from '@glimmer/reference';
import { dict, emptyArray, EMPTY_STRING_ARRAY } from '@glimmer/util';
import { CONSTANT_TAG } from '@glimmer/validator';
import { $sp } from '@glimmer/vm';
import { REGISTERS } from '../symbols';
/*
The calling convention is:
* 0-N block arguments at the bottom
* 0-N positional arguments next (left-to-right)
* 0-N named arguments next
*/
export class VMArgumentsImpl {
constructor() {
this.stack = null;
this.positional = new PositionalArgumentsImpl();
this.named = new NamedArgumentsImpl();
this.blocks = new BlockArgumentsImpl();
}
empty(stack) {
let base = stack[REGISTERS][$sp] + 1;
this.named.empty(stack, base);
this.positional.empty(stack, base);
this.blocks.empty(stack, base);
return this;
}
setup(stack, names, blockNames, positionalCount, atNames) {
this.stack = stack;
/*
| ... | blocks | positional | named |
| ... | b0 b1 | p0 p1 p2 p3 | n0 n1 |
index | ... | 4/5/6 7/8/9 | 10 11 12 13 | 14 15 |
^ ^ ^ ^
bbase pbase nbase sp
*/
let named = this.named;
let namedCount = names.length;
let namedBase = stack[REGISTERS][$sp] - namedCount + 1;
named.setup(stack, namedBase, namedCount, names, atNames);
let positional = this.positional;
let positionalBase = namedBase - positionalCount;
positional.setup(stack, positionalBase, positionalCount);
let blocks = this.blocks;
let blocksCount = blockNames.length;
let blocksBase = positionalBase - blocksCount * 3;
blocks.setup(stack, blocksBase, blocksCount, blockNames);
}
get base() {
return this.blocks.base;
}
get length() {
return this.positional.length + this.named.length + this.blocks.length * 3;
}
at(pos) {
return this.positional.at(pos);
}
realloc(offset) {
let {
stack
} = this;
if (offset > 0 && stack !== null) {
let {
positional,
named
} = this;
let newBase = positional.base + offset;
let length = positional.length + named.length;
for (let i = length - 1; i >= 0; i--) {
stack.copy(i + positional.base, i + newBase);
}
positional.base += offset;
named.base += offset;
stack[REGISTERS][$sp] += offset;
}
}
capture() {
let positional = this.positional.length === 0 ? EMPTY_POSITIONAL : this.positional.capture();
let named = this.named.length === 0 ? EMPTY_NAMED : this.named.capture();
return {
named,
positional
};
}
clear() {
let {
stack,
length
} = this;
if (length > 0 && stack !== null) stack.pop(length);
}
}
const EMPTY_REFERENCES = emptyArray();
export class PositionalArgumentsImpl {
constructor() {
this.base = 0;
this.length = 0;
this.stack = null;
this._references = null;
}
empty(stack, base) {
this.stack = stack;
this.base = base;
this.length = 0;
this._references = EMPTY_REFERENCES;
}
setup(stack, base, length) {
this.stack = stack;
this.base = base;
this.length = length;
if (length === 0) {
this._references = EMPTY_REFERENCES;
} else {
this._references = null;
}
}
at(position) {
let {
base,
length,
stack
} = this;
if (position < 0 || position >= length) {
return UNDEFINED_REFERENCE;
}
return stack.get(position, base);
}
capture() {
return this.references;
}
prepend(other) {
let additions = other.length;
if (additions > 0) {
let {
base,
length,
stack
} = this;
this.base = base = base - additions;
this.length = length + additions;
for (let i = 0; i < additions; i++) {
stack.set(other[i], i, base);
}
this._references = null;
}
}
get references() {
let references = this._references;
if (!references) {
let {
stack,
base,
length
} = this;
references = this._references = stack.slice(base, base + length);
}
return references;
}
}
export class NamedArgumentsImpl {
constructor() {
this.base = 0;
this.length = 0;
this._references = null;
this._names = EMPTY_STRING_ARRAY;
this._atNames = EMPTY_STRING_ARRAY;
}
empty(stack, base) {
this.stack = stack;
this.base = base;
this.length = 0;
this._references = EMPTY_REFERENCES;
this._names = EMPTY_STRING_ARRAY;
this._atNames = EMPTY_STRING_ARRAY;
}
setup(stack, base, length, names, atNames) {
this.stack = stack;
this.base = base;
this.length = length;
if (length === 0) {
this._references = EMPTY_REFERENCES;
this._names = EMPTY_STRING_ARRAY;
this._atNames = EMPTY_STRING_ARRAY;
} else {
this._references = null;
if (atNames) {
this._names = null;
this._atNames = names;
} else {
this._names = names;
this._atNames = null;
}
}
}
get names() {
let names = this._names;
if (!names) {
names = this._names = this._atNames.map(this.toSyntheticName);
}
return names;
}
get atNames() {
let atNames = this._atNames;
if (!atNames) {
atNames = this._atNames = this._names.map(this.toAtName);
}
return atNames;
}
has(name) {
return this.names.indexOf(name) !== -1;
}
get(name, atNames = false) {
let {
base,
stack
} = this;
let names = atNames ? this.atNames : this.names;
let idx = names.indexOf(name);
if (idx === -1) {
return UNDEFINED_REFERENCE;
}
let ref = stack.get(idx, base);
if (DEBUG) {
return createDebugAliasRef(atNames ? name : `@${name}`, ref);
} else {
return ref;
}
}
capture() {
let {
names,
references
} = this;
let map = dict();
for (let i = 0; i < names.length; i++) {
let name = names[i];
if (DEBUG) {
map[name] = createDebugAliasRef(`@${name}`, references[i]);
} else {
map[name] = references[i];
}
}
return map;
}
merge(other) {
let keys = Object.keys(other);
if (keys.length > 0) {
let {
names,
length,
stack
} = this;
let newNames = names.slice();
for (let i = 0; i < keys.length; i++) {
let name = keys[i];
let idx = newNames.indexOf(name);
if (idx === -1) {
length = newNames.push(name);
stack.push(other[name]);
}
}
this.length = length;
this._references = null;
this._names = newNames;
this._atNames = null;
}
}
get references() {
let references = this._references;
if (!references) {
let {
base,
length,
stack
} = this;
references = this._references = stack.slice(base, base + length);
}
return references;
}
toSyntheticName(name) {
return name.slice(1);
}
toAtName(name) {
return `@${name}`;
}
}
function toSymbolName(name) {
return `&${name}`;
}
const EMPTY_BLOCK_VALUES = emptyArray();
export class BlockArgumentsImpl {
constructor() {
this.internalValues = null;
this._symbolNames = null;
this.internalTag = null;
this.names = EMPTY_STRING_ARRAY;
this.length = 0;
this.base = 0;
}
empty(stack, base) {
this.stack = stack;
this.names = EMPTY_STRING_ARRAY;
this.base = base;
this.length = 0;
this._symbolNames = null;
this.internalTag = CONSTANT_TAG;
this.internalValues = EMPTY_BLOCK_VALUES;
}
setup(stack, base, length, names) {
this.stack = stack;
this.names = names;
this.base = base;
this.length = length;
this._symbolNames = null;
if (length === 0) {
this.internalTag = CONSTANT_TAG;
this.internalValues = EMPTY_BLOCK_VALUES;
} else {
this.internalTag = null;
this.internalValues = null;
}
}
get values() {
let values = this.internalValues;
if (!values) {
let {
base,
length,
stack
} = this;
values = this.internalValues = stack.slice(base, base + length * 3);
}
return values;
}
has(name) {
return this.names.indexOf(name) !== -1;
}
get(name) {
let idx = this.names.indexOf(name);
if (idx === -1) {
return null;
}
let {
base,
stack
} = this;
let table = stack.get(idx * 3, base);
let scope = stack.get(idx * 3 + 1, base);
let handle = stack.get(idx * 3 + 2, base);
return handle === null ? null : [handle, scope, table];
}
capture() {
return new CapturedBlockArgumentsImpl(this.names, this.values);
}
get symbolNames() {
let symbolNames = this._symbolNames;
if (symbolNames === null) {
symbolNames = this._symbolNames = this.names.map(toSymbolName);
}
return symbolNames;
}
}
class CapturedBlockArgumentsImpl {
constructor(names, values) {
this.names = names;
this.values = values;
this.length = names.length;
}
has(name) {
return this.names.indexOf(name) !== -1;
}
get(name) {
let idx = this.names.indexOf(name);
if (idx === -1) return null;
return [this.values[idx * 3 + 2], this.values[idx * 3 + 1], this.values[idx * 3]];
}
}
export function createCapturedArgs(named, positional) {
return {
named,
positional
};
}
export function reifyNamed(named) {
let reified = dict();
for (let key in named) {
reified[key] = valueForRef(named[key]);
}
return reified;
}
export function reifyPositional(positional) {
return positional.map(valueForRef);
}
export function reifyArgs(args) {
return {
named: reifyNamed(args.named),
positional: reifyPositional(args.positional)
};
}
export const EMPTY_NAMED = Object.freeze(Object.create(null));
export const EMPTY_POSITIONAL = EMPTY_REFERENCES;
export const EMPTY_ARGS = createCapturedArgs(EMPTY_NAMED, EMPTY_POSITIONAL);
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{ check, CheckBlockSymbolTable, CheckHandle, CheckOption, CheckOr } from '@glimmer/debug';\nimport { DEBUG } from '@glimmer/env';\nimport {\n  BlockArguments,\n  BlockSymbolTable,\n  BlockValue,\n  CapturedArguments,\n  CapturedBlockArguments,\n  CapturedNamedArguments,\n  CapturedPositionalArguments,\n  CompilableBlock,\n  Dict,\n  NamedArguments,\n  Option,\n  PositionalArguments,\n  Scope,\n  ScopeBlock,\n  VMArguments,\n} from '@glimmer/interfaces';\nimport {\n  createDebugAliasRef,\n  Reference,\n  UNDEFINED_REFERENCE,\n  valueForRef,\n} from '@glimmer/reference';\nimport { dict, emptyArray, EMPTY_STRING_ARRAY } from '@glimmer/util';\nimport { CONSTANT_TAG, Tag } from '@glimmer/validator';\nimport { $sp } from '@glimmer/vm';\nimport { CheckCompilableBlock, CheckReference, CheckScope } from '../compiled/opcodes/-debug-strip';\nimport { REGISTERS } from '../symbols';\nimport { EvaluationStack } from './stack';\n\n/*\n  The calling convention is:\n\n  * 0-N block arguments at the bottom\n  * 0-N positional arguments next (left-to-right)\n  * 0-N named arguments next\n*/\n\nexport class VMArgumentsImpl implements VMArguments {\n  private stack: Option<EvaluationStack> = null;\n  public positional = new PositionalArgumentsImpl();\n  public named = new NamedArgumentsImpl();\n  public blocks = new BlockArgumentsImpl();\n\n  empty(stack: EvaluationStack): this {\n    let base = stack[REGISTERS][$sp] + 1;\n\n    this.named.empty(stack, base);\n    this.positional.empty(stack, base);\n    this.blocks.empty(stack, base);\n\n    return this;\n  }\n\n  setup(\n    stack: EvaluationStack,\n    names: readonly string[],\n    blockNames: readonly string[],\n    positionalCount: number,\n    atNames: boolean\n  ) {\n    this.stack = stack;\n\n    /*\n           | ... | blocks      | positional  | named |\n           | ... | b0    b1    | p0 p1 p2 p3 | n0 n1 |\n     index | ... | 4/5/6 7/8/9 | 10 11 12 13 | 14 15 |\n                   ^             ^             ^  ^\n                 bbase         pbase       nbase  sp\n    */\n\n    let named = this.named;\n    let namedCount = names.length;\n    let namedBase = stack[REGISTERS][$sp] - namedCount + 1;\n\n    named.setup(stack, namedBase, namedCount, names, atNames);\n\n    let positional = this.positional;\n    let positionalBase = namedBase - positionalCount;\n\n    positional.setup(stack, positionalBase, positionalCount);\n\n    let blocks = this.blocks;\n    let blocksCount = blockNames.length;\n    let blocksBase = positionalBase - blocksCount * 3;\n\n    blocks.setup(stack, blocksBase, blocksCount, blockNames);\n  }\n\n  get base(): number {\n    return this.blocks.base;\n  }\n\n  get length(): number {\n    return this.positional.length + this.named.length + this.blocks.length * 3;\n  }\n\n  at(pos: number): Reference {\n    return this.positional.at(pos);\n  }\n\n  realloc(offset: number) {\n    let { stack } = this;\n    if (offset > 0 && stack !== null) {\n      let { positional, named } = this;\n      let newBase = positional.base + offset;\n      let length = positional.length + named.length;\n\n      for (let i = length - 1; i >= 0; i--) {\n        stack.copy(i + positional.base, i + newBase);\n      }\n\n      positional.base += offset;\n      named.base += offset;\n      stack[REGISTERS][$sp] += offset;\n    }\n  }\n\n  capture(): CapturedArguments {\n    let positional = this.positional.length === 0 ? EMPTY_POSITIONAL : this.positional.capture();\n    let named = this.named.length === 0 ? EMPTY_NAMED : this.named.capture();\n\n    return { named, positional } as CapturedArguments;\n  }\n\n  clear(): void {\n    let { stack, length } = this;\n    if (length > 0 && stack !== null) stack.pop(length);\n  }\n}\n\nconst EMPTY_REFERENCES = emptyArray<Reference>();\n\nexport class PositionalArgumentsImpl implements PositionalArguments {\n  public base = 0;\n  public length = 0;\n\n  private stack: EvaluationStack = null as any;\n\n  private _references: Option<readonly Reference[]> = null;\n\n  empty(stack: EvaluationStack, base: number) {\n    this.stack = stack;\n    this.base = base;\n    this.length = 0;\n\n    this._references = EMPTY_REFERENCES;\n  }\n\n  setup(stack: EvaluationStack, base: number, length: number) {\n    this.stack = stack;\n    this.base = base;\n    this.length = length;\n\n    if (length === 0) {\n      this._references = EMPTY_REFERENCES;\n    } else {\n      this._references = null;\n    }\n  }\n\n  at(position: number): Reference {\n    let { base, length, stack } = this;\n\n    if (position < 0 || position >= length) {\n      return UNDEFINED_REFERENCE;\n    }\n\n    return check(stack.get(position, base), CheckReference);\n  }\n\n  capture(): CapturedPositionalArguments {\n    return this.references as CapturedPositionalArguments;\n  }\n\n  prepend(other: Reference[]) {\n    let additions = other.length;\n\n    if (additions > 0) {\n      let { base, length, stack } = this;\n\n      this.base = base = base - additions;\n      this.length = length + additions;\n\n      for (let i = 0; i < additions; i++) {\n        stack.set(other[i], i, base);\n      }\n\n      this._references = null;\n    }\n  }\n\n  private get references(): readonly Reference[] {\n    let references = this._references;\n\n    if (!references) {\n      let { stack, base, length } = this;\n      references = this._references = stack.slice<Reference>(base, base + length);\n    }\n\n    return references;\n  }\n}\n\nexport class NamedArgumentsImpl implements NamedArguments {\n  public base = 0;\n  public length = 0;\n\n  private stack!: EvaluationStack;\n\n  private _references: Option<readonly Reference[]> = null;\n\n  private _names: Option<readonly string[]> = EMPTY_STRING_ARRAY;\n  private _atNames: Option<readonly string[]> = EMPTY_STRING_ARRAY;\n\n  empty(stack: EvaluationStack, base: number) {\n    this.stack = stack;\n    this.base = base;\n    this.length = 0;\n\n    this._references = EMPTY_REFERENCES;\n    this._names = EMPTY_STRING_ARRAY;\n    this._atNames = EMPTY_STRING_ARRAY;\n  }\n\n  setup(\n    stack: EvaluationStack,\n    base: number,\n    length: number,\n    names: readonly string[],\n    atNames: boolean\n  ) {\n    this.stack = stack;\n    this.base = base;\n    this.length = length;\n\n    if (length === 0) {\n      this._references = EMPTY_REFERENCES;\n      this._names = EMPTY_STRING_ARRAY;\n      this._atNames = EMPTY_STRING_ARRAY;\n    } else {\n      this._references = null;\n\n      if (atNames) {\n        this._names = null;\n        this._atNames = names;\n      } else {\n        this._names = names;\n        this._atNames = null;\n      }\n    }\n  }\n\n  get names(): readonly string[] {\n    let names = this._names;\n\n    if (!names) {\n      names = this._names = this._atNames!.map(this.toSyntheticName);\n    }\n\n    return names!;\n  }\n\n  get atNames(): readonly string[] {\n    let atNames = this._atNames;\n\n    if (!atNames) {\n      atNames = this._atNames = this._names!.map(this.toAtName);\n    }\n\n    return atNames!;\n  }\n\n  has(name: string): boolean {\n    return this.names.indexOf(name) !== -1;\n  }\n\n  get(name: string, atNames = false): Reference {\n    let { base, stack } = this;\n\n    let names = atNames ? this.atNames : this.names;\n\n    let idx = names.indexOf(name);\n\n    if (idx === -1) {\n      return UNDEFINED_REFERENCE;\n    }\n\n    let ref = stack.get<Reference>(idx, base);\n\n    if (DEBUG) {\n      return createDebugAliasRef!(atNames ? name : `@${name}`, ref);\n    } else {\n      return ref;\n    }\n  }\n\n  capture(): CapturedNamedArguments {\n    let { names, references } = this;\n    let map = dict<Reference>();\n\n    for (let i = 0; i < names.length; i++) {\n      let name = names[i];\n\n      if (DEBUG) {\n        map[name] = createDebugAliasRef!(`@${name}`, references[i]);\n      } else {\n        map[name] = references[i];\n      }\n    }\n\n    return map as CapturedNamedArguments;\n  }\n\n  merge(other: Record<string, Reference>) {\n    let keys = Object.keys(other);\n\n    if (keys.length > 0) {\n      let { names, length, stack } = this;\n      let newNames = names.slice();\n\n      for (let i = 0; i < keys.length; i++) {\n        let name = keys[i];\n        let idx = newNames.indexOf(name);\n\n        if (idx === -1) {\n          length = newNames.push(name);\n          stack.push(other[name]);\n        }\n      }\n\n      this.length = length;\n      this._references = null;\n      this._names = newNames;\n      this._atNames = null;\n    }\n  }\n\n  private get references(): readonly Reference[] {\n    let references = this._references;\n\n    if (!references) {\n      let { base, length, stack } = this;\n      references = this._references = stack.slice<Reference>(base, base + length);\n    }\n\n    return references;\n  }\n\n  private toSyntheticName(this: void, name: string): string {\n    return name.slice(1);\n  }\n\n  private toAtName(this: void, name: string): string {\n    return `@${name}`;\n  }\n}\n\nfunction toSymbolName(name: string): string {\n  return `&${name}`;\n}\n\nconst EMPTY_BLOCK_VALUES = emptyArray<BlockValue>();\n\nexport class BlockArgumentsImpl implements BlockArguments {\n  private stack!: EvaluationStack;\n  private internalValues: Option<readonly BlockValue[]> = null;\n  private _symbolNames: Option<readonly string[]> = null;\n\n  public internalTag: Option<Tag> = null;\n  public names: readonly string[] = EMPTY_STRING_ARRAY;\n\n  public length = 0;\n  public base = 0;\n\n  empty(stack: EvaluationStack, base: number) {\n    this.stack = stack;\n    this.names = EMPTY_STRING_ARRAY;\n    this.base = base;\n    this.length = 0;\n    this._symbolNames = null;\n\n    this.internalTag = CONSTANT_TAG;\n    this.internalValues = EMPTY_BLOCK_VALUES;\n  }\n\n  setup(stack: EvaluationStack, base: number, length: number, names: readonly string[]) {\n    this.stack = stack;\n    this.names = names;\n    this.base = base;\n    this.length = length;\n    this._symbolNames = null;\n\n    if (length === 0) {\n      this.internalTag = CONSTANT_TAG;\n      this.internalValues = EMPTY_BLOCK_VALUES;\n    } else {\n      this.internalTag = null;\n      this.internalValues = null;\n    }\n  }\n\n  get values(): readonly BlockValue[] {\n    let values = this.internalValues;\n\n    if (!values) {\n      let { base, length, stack } = this;\n      values = this.internalValues = stack.slice<BlockValue>(base, base + length * 3);\n    }\n\n    return values;\n  }\n\n  has(name: string): boolean {\n    return this.names!.indexOf(name) !== -1;\n  }\n\n  get(name: string): Option<ScopeBlock> {\n    let idx = this.names!.indexOf(name);\n\n    if (idx === -1) {\n      return null;\n    }\n\n    let { base, stack } = this;\n\n    let table = check(stack.get(idx * 3, base), CheckOption(CheckBlockSymbolTable));\n    let scope = check(stack.get(idx * 3 + 1, base), CheckOption(CheckScope));\n    let handle = check(\n      stack.get(idx * 3 + 2, base),\n      CheckOption(CheckOr(CheckHandle, CheckCompilableBlock))\n    );\n\n    return handle === null ? null : ([handle, scope!, table!] as ScopeBlock);\n  }\n\n  capture(): CapturedBlockArguments {\n    return new CapturedBlockArgumentsImpl(this.names, this.values);\n  }\n\n  get symbolNames(): readonly string[] {\n    let symbolNames = this._symbolNames;\n\n    if (symbolNames === null) {\n      symbolNames = this._symbolNames = this.names.map(toSymbolName);\n    }\n\n    return symbolNames;\n  }\n}\n\nclass CapturedBlockArgumentsImpl implements CapturedBlockArguments {\n  public length: number;\n\n  constructor(public names: readonly string[], public values: readonly Option<BlockValue>[]) {\n    this.length = names.length;\n  }\n\n  has(name: string): boolean {\n    return this.names.indexOf(name) !== -1;\n  }\n\n  get(name: string): Option<ScopeBlock> {\n    let idx = this.names.indexOf(name);\n\n    if (idx === -1) return null;\n\n    return [\n      this.values[idx * 3 + 2] as CompilableBlock,\n      this.values[idx * 3 + 1] as Scope,\n      this.values[idx * 3] as BlockSymbolTable,\n    ];\n  }\n}\n\nexport function createCapturedArgs(named: Dict<Reference>, positional: Reference[]) {\n  return {\n    named,\n    positional,\n  } as CapturedArguments;\n}\n\nexport function reifyNamed(named: CapturedNamedArguments) {\n  let reified = dict();\n\n  for (let key in named) {\n    reified[key] = valueForRef(named[key]);\n  }\n\n  return reified;\n}\n\nexport function reifyPositional(positional: CapturedPositionalArguments) {\n  return positional.map(valueForRef);\n}\n\nexport function reifyArgs(args: CapturedArguments) {\n  return {\n    named: reifyNamed(args.named),\n    positional: reifyPositional(args.positional),\n  };\n}\n\nexport const EMPTY_NAMED = Object.freeze(Object.create(null)) as CapturedNamedArguments;\nexport const EMPTY_POSITIONAL = EMPTY_REFERENCES as CapturedPositionalArguments;\nexport const EMPTY_ARGS = createCapturedArgs(EMPTY_NAMED, EMPTY_POSITIONAL);\n"],"sourceRoot":""}