@angular/material
Version:
Angular Material
239 lines • 41.1 kB
JavaScript
;
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.migrateFileContent = void 0;
const config_1 = require("./config");
/**
* Migrates the content of a file to the new theming API. Note that this migration is using plain
* string manipulation, rather than the AST from PostCSS and the schematics string manipulation
* APIs, because it allows us to run it inside g3 and to avoid introducing new dependencies.
* @param content Content of the file.
* @param oldMaterialPrefix Prefix with which the old Material imports should start.
* Has to end with a slash. E.g. if `@import '~@angular/material/theming'` should be
* matched, the prefix would be `~@angular/material/`.
* @param oldCdkPrefix Prefix with which the old CDK imports should start.
* Has to end with a slash. E.g. if `@import '~@angular/cdk/overlay'` should be
* matched, the prefix would be `~@angular/cdk/`.
* @param newMaterialImportPath New import to the Material theming API (e.g. `~@angular/material`).
* @param newCdkImportPath New import to the CDK Sass APIs (e.g. `~@angular/cdk`).
*/
function migrateFileContent(content, oldMaterialPrefix, oldCdkPrefix, newMaterialImportPath, newCdkImportPath) {
const materialResults = detectImports(content, oldMaterialPrefix);
const cdkResults = detectImports(content, oldCdkPrefix);
// Try to migrate the symbols even if there are no imports. This is used
// to cover the case where the Components symbols were used transitively.
content = migrateMaterialSymbols(content, newMaterialImportPath, materialResults);
content = migrateCdkSymbols(content, newCdkImportPath, cdkResults);
content = replaceRemovedVariables(content, config_1.removedMaterialVariables);
// We can assume that the migration has taken care of any Components symbols that were
// imported transitively so we can always drop the old imports. We also assume that imports
// to the new entry points have been added already.
if (materialResults.imports.length) {
content = replaceRemovedVariables(content, config_1.unprefixedRemovedVariables);
content = removeStrings(content, materialResults.imports);
}
if (cdkResults.imports.length) {
content = removeStrings(content, cdkResults.imports);
}
return content;
}
exports.migrateFileContent = migrateFileContent;
/**
* Counts the number of imports with a specific prefix and extracts their namespaces.
* @param content File content in which to look for imports.
* @param prefix Prefix that the imports should start with.
*/
function detectImports(content, prefix) {
if (prefix[prefix.length - 1] !== '/') {
// Some of the logic further down makes assumptions about the import depth.
throw Error(`Prefix "${prefix}" has to end in a slash.`);
}
// List of `@use` namespaces from which Angular CDK/Material APIs may be referenced.
// Since we know that the library doesn't have any name collisions, we can treat all of these
// namespaces as equivalent.
const namespaces = [];
const imports = [];
const pattern = new RegExp(`@(import|use) +['"]${escapeRegExp(prefix)}.*['"].*;?\n`, 'g');
let match = null;
while (match = pattern.exec(content)) {
const [fullImport, type] = match;
if (type === 'use') {
const namespace = extractNamespaceFromUseStatement(fullImport);
if (namespaces.indexOf(namespace) === -1) {
namespaces.push(namespace);
}
}
imports.push(fullImport);
}
return { imports, namespaces };
}
/** Migrates the Material symbols in a file. */
function migrateMaterialSymbols(content, importPath, detectedImports) {
const initialContent = content;
const namespace = 'mat';
// Migrate the mixins.
content = renameSymbols(content, config_1.materialMixins, detectedImports.namespaces, mixinKeyFormatter, getMixinValueFormatter(namespace));
// Migrate the functions.
content = renameSymbols(content, config_1.materialFunctions, detectedImports.namespaces, functionKeyFormatter, getFunctionValueFormatter(namespace));
// Migrate the variables.
content = renameSymbols(content, config_1.materialVariables, detectedImports.namespaces, variableKeyFormatter, getVariableValueFormatter(namespace));
if (content !== initialContent) {
// Add an import to the new API only if any of the APIs were being used.
content = insertUseStatement(content, importPath, detectedImports.imports, namespace);
}
return content;
}
/** Migrates the CDK symbols in a file. */
function migrateCdkSymbols(content, importPath, detectedImports) {
const initialContent = content;
const namespace = 'cdk';
// Migrate the mixins.
content = renameSymbols(content, config_1.cdkMixins, detectedImports.namespaces, mixinKeyFormatter, getMixinValueFormatter(namespace));
// Migrate the variables.
content = renameSymbols(content, config_1.cdkVariables, detectedImports.namespaces, variableKeyFormatter, getVariableValueFormatter(namespace));
// Previously the CDK symbols were exposed through `material/theming`, but now we have a
// dedicated entrypoint for the CDK. Only add an import for it if any of the symbols are used.
if (content !== initialContent) {
content = insertUseStatement(content, importPath, detectedImports.imports, namespace);
}
return content;
}
/**
* Renames all Sass symbols in a file based on a pre-defined mapping.
* @param content Content of a file to be migrated.
* @param mapping Mapping between symbol names and their replacements.
* @param namespaces Names to iterate over and pass to getKeyPattern.
* @param getKeyPattern Function used to turn each of the keys into a regex.
* @param formatValue Formats the value that will replace any matches of the pattern returned by
* `getKeyPattern`.
*/
function renameSymbols(content, mapping, namespaces, getKeyPattern, formatValue) {
// The null at the end is so that we make one last pass to cover non-namespaced symbols.
[...namespaces.slice().sort(sortLengthDescending), null].forEach(namespace => {
// Migrate the longest keys first so that our regex-based replacements don't accidentally
// capture keys that contain other keys. E.g. `$mat-blue` is contained within `$mat-blue-grey`.
Object.keys(mapping).sort(sortLengthDescending).forEach(key => {
const pattern = getKeyPattern(namespace, key);
// Sanity check since non-global regexes will only replace the first match.
if (pattern.flags.indexOf('g') === -1) {
throw Error('Replacement pattern must be global.');
}
content = content.replace(pattern, formatValue(mapping[key]));
});
});
return content;
}
/** Inserts an `@use` statement in a string. */
function insertUseStatement(content, importPath, importsToIgnore, namespace) {
// If the content already has the `@use` import, we don't need to add anything.
const alreadyImportedPattern = new RegExp(`@use +['"]${importPath}['"]`, 'g');
if (alreadyImportedPattern.test(content)) {
return content;
}
// We want to find the first import that isn't in the list of ignored imports or find nothing,
// because the imports being replaced might be the only ones in the file and they can be further
// down. An easy way to do this is to replace the imports with a random character and run
// `indexOf` on the result. This isn't the most efficient way of doing it, but it's more compact
// and it allows us to easily deal with things like comment nodes.
const contentToSearch = importsToIgnore.reduce((accumulator, current) => accumulator.replace(current, '◬'.repeat(current.length)), content);
// Sass has a limitation that all `@use` declarations have to come before `@import` so we have
// to find the first import and insert before it. Technically we can get away with always
// inserting at 0, but the file may start with something like a license header.
const newImportIndex = Math.max(0, contentToSearch.indexOf('@import '));
return content.slice(0, newImportIndex) + `@use '${importPath}' as ${namespace};\n` +
content.slice(newImportIndex);
}
/** Formats a migration key as a Sass mixin invocation. */
function mixinKeyFormatter(namespace, name) {
// Note that adding a `(` at the end of the pattern would be more accurate, but mixin
// invocations don't necessarily have to include the parentheses. We could add `[(;]`,
// but then we won't know which character to include in the replacement string.
return new RegExp(`@include +${escapeRegExp((namespace ? namespace + '.' : '') + name)}`, 'g');
}
/** Returns a function that can be used to format a Sass mixin replacement. */
function getMixinValueFormatter(namespace) {
// Note that adding a `(` at the end of the pattern would be more accurate,
// but mixin invocations don't necessarily have to include the parentheses.
return name => `@include ${namespace}.${name}`;
}
/** Formats a migration key as a Sass function invocation. */
function functionKeyFormatter(namespace, name) {
return new RegExp(escapeRegExp(`${namespace ? namespace + '.' : ''}${name}(`), 'g');
}
/** Returns a function that can be used to format a Sass function replacement. */
function getFunctionValueFormatter(namespace) {
return name => `${namespace}.${name}(`;
}
/** Formats a migration key as a Sass variable. */
function variableKeyFormatter(namespace, name) {
return new RegExp(escapeRegExp(`${namespace ? namespace + '.' : ''}$${name}`), 'g');
}
/** Returns a function that can be used to format a Sass variable replacement. */
function getVariableValueFormatter(namespace) {
return name => `${namespace}.$${name}`;
}
/** Escapes special regex characters in a string. */
function escapeRegExp(str) {
return str.replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
}
/** Used with `Array.prototype.sort` to order strings in descending length. */
function sortLengthDescending(a, b) {
return b.length - a.length;
}
/** Removes all strings from another string. */
function removeStrings(content, toRemove) {
return toRemove
.reduce((accumulator, current) => accumulator.replace(current, ''), content)
.replace(/^\s+/, '');
}
/** Parses out the namespace from a Sass `@use` statement. */
function extractNamespaceFromUseStatement(fullImport) {
const closeQuoteIndex = Math.max(fullImport.lastIndexOf(`"`), fullImport.lastIndexOf(`'`));
if (closeQuoteIndex > -1) {
const asExpression = 'as ';
const asIndex = fullImport.indexOf(asExpression, closeQuoteIndex);
// If we found an ` as ` expression, we consider the rest of the text as the namespace.
if (asIndex > -1) {
return fullImport.slice(asIndex + asExpression.length).split(';')[0].trim();
}
// Otherwise the namespace is the name of the file that is being imported.
const lastSlashIndex = fullImport.lastIndexOf('/', closeQuoteIndex);
if (lastSlashIndex > -1) {
const fileName = fullImport.slice(lastSlashIndex + 1, closeQuoteIndex)
// Sass allows for leading underscores to be omitted and it technically supports .scss.
.replace(/^_|(\.import)?\.scss$|\.import$/g, '');
// Sass ignores `/index` and infers the namespace as the next segment in the path.
if (fileName === 'index') {
const nextSlashIndex = fullImport.lastIndexOf('/', lastSlashIndex - 1);
if (nextSlashIndex > -1) {
return fullImport.slice(nextSlashIndex + 1, lastSlashIndex);
}
}
else {
return fileName;
}
}
}
throw Error(`Could not extract namespace from import "${fullImport}".`);
}
/**
* Replaces variables that have been removed with their values.
* @param content Content of the file to be migrated.
* @param variables Mapping between variable names and their values.
*/
function replaceRemovedVariables(content, variables) {
Object.keys(variables).sort(sortLengthDescending).forEach(variableName => {
// Note that the pattern uses a negative lookahead to exclude
// variable assignments, because they can't be migrated.
const regex = new RegExp(`\\$${escapeRegExp(variableName)}(?!\\s+:|:)`, 'g');
content = content.replace(regex, variables[variableName]);
});
return content;
}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {\n  materialMixins,\n  materialFunctions,\n  materialVariables,\n  cdkMixins,\n  cdkVariables,\n  removedMaterialVariables,\n  unprefixedRemovedVariables\n} from './config';\n\n/** The result of a search for imports and namespaces in a file. */\ninterface DetectImportResult {\n  imports: string[];\n  namespaces: string[];\n}\n\n/**\n * Migrates the content of a file to the new theming API. Note that this migration is using plain\n * string manipulation, rather than the AST from PostCSS and the schematics string manipulation\n * APIs, because it allows us to run it inside g3 and to avoid introducing new dependencies.\n * @param content Content of the file.\n * @param oldMaterialPrefix Prefix with which the old Material imports should start.\n *   Has to end with a slash. E.g. if `@import '~@angular/material/theming'` should be\n *   matched, the prefix would be `~@angular/material/`.\n * @param oldCdkPrefix Prefix with which the old CDK imports should start.\n *   Has to end with a slash. E.g. if `@import '~@angular/cdk/overlay'` should be\n *   matched, the prefix would be `~@angular/cdk/`.\n * @param newMaterialImportPath New import to the Material theming API (e.g. `~@angular/material`).\n * @param newCdkImportPath New import to the CDK Sass APIs (e.g. `~@angular/cdk`).\n */\nexport function migrateFileContent(content: string,\n                                   oldMaterialPrefix: string,\n                                   oldCdkPrefix: string,\n                                   newMaterialImportPath: string,\n                                   newCdkImportPath: string): string {\n  const materialResults = detectImports(content, oldMaterialPrefix);\n  const cdkResults = detectImports(content, oldCdkPrefix);\n\n  // Try to migrate the symbols even if there are no imports. This is used\n  // to cover the case where the Components symbols were used transitively.\n  content = migrateMaterialSymbols(content, newMaterialImportPath, materialResults);\n  content = migrateCdkSymbols(content, newCdkImportPath, cdkResults);\n  content = replaceRemovedVariables(content, removedMaterialVariables);\n\n  // We can assume that the migration has taken care of any Components symbols that were\n  // imported transitively so we can always drop the old imports. We also assume that imports\n  // to the new entry points have been added already.\n  if (materialResults.imports.length) {\n    content = replaceRemovedVariables(content, unprefixedRemovedVariables);\n    content = removeStrings(content, materialResults.imports);\n  }\n\n  if (cdkResults.imports.length) {\n    content = removeStrings(content, cdkResults.imports);\n  }\n\n  return content;\n}\n\n/**\n * Counts the number of imports with a specific prefix and extracts their namespaces.\n * @param content File content in which to look for imports.\n * @param prefix Prefix that the imports should start with.\n */\nfunction detectImports(content: string, prefix: string): DetectImportResult {\n  if (prefix[prefix.length - 1] !== '/') {\n    // Some of the logic further down makes assumptions about the import depth.\n    throw Error(`Prefix \"${prefix}\" has to end in a slash.`);\n  }\n\n  // List of `@use` namespaces from which Angular CDK/Material APIs may be referenced.\n  // Since we know that the library doesn't have any name collisions, we can treat all of these\n  // namespaces as equivalent.\n  const namespaces: string[] = [];\n  const imports: string[] = [];\n  const pattern = new RegExp(`@(import|use) +['\"]${escapeRegExp(prefix)}.*['\"].*;?\\n`, 'g');\n  let match: RegExpExecArray | null = null;\n\n  while (match = pattern.exec(content)) {\n    const [fullImport, type] = match;\n\n    if (type === 'use') {\n      const namespace = extractNamespaceFromUseStatement(fullImport);\n\n      if (namespaces.indexOf(namespace) === -1) {\n        namespaces.push(namespace);\n      }\n    }\n\n    imports.push(fullImport);\n  }\n\n  return {imports, namespaces};\n}\n\n/** Migrates the Material symbols in a file. */\nfunction migrateMaterialSymbols(content: string, importPath: string,\n                                detectedImports: DetectImportResult): string {\n  const initialContent = content;\n  const namespace = 'mat';\n\n  // Migrate the mixins.\n  content = renameSymbols(content, materialMixins, detectedImports.namespaces, mixinKeyFormatter,\n    getMixinValueFormatter(namespace));\n\n  // Migrate the functions.\n  content = renameSymbols(content, materialFunctions, detectedImports.namespaces,\n    functionKeyFormatter, getFunctionValueFormatter(namespace));\n\n  // Migrate the variables.\n  content = renameSymbols(content, materialVariables, detectedImports.namespaces,\n    variableKeyFormatter, getVariableValueFormatter(namespace));\n\n  if (content !== initialContent) {\n    // Add an import to the new API only if any of the APIs were being used.\n    content = insertUseStatement(content, importPath, detectedImports.imports, namespace);\n  }\n\n  return content;\n}\n\n/** Migrates the CDK symbols in a file. */\nfunction migrateCdkSymbols(content: string, importPath: string,\n                           detectedImports: DetectImportResult): string {\n  const initialContent = content;\n  const namespace = 'cdk';\n\n  // Migrate the mixins.\n  content = renameSymbols(content, cdkMixins, detectedImports.namespaces, mixinKeyFormatter,\n    getMixinValueFormatter(namespace));\n\n  // Migrate the variables.\n  content = renameSymbols(content, cdkVariables, detectedImports.namespaces, variableKeyFormatter,\n    getVariableValueFormatter(namespace));\n\n  // Previously the CDK symbols were exposed through `material/theming`, but now we have a\n  // dedicated entrypoint for the CDK. Only add an import for it if any of the symbols are used.\n  if (content !== initialContent) {\n    content = insertUseStatement(content, importPath, detectedImports.imports, namespace);\n  }\n\n  return content;\n}\n\n/**\n * Renames all Sass symbols in a file based on a pre-defined mapping.\n * @param content Content of a file to be migrated.\n * @param mapping Mapping between symbol names and their replacements.\n * @param namespaces Names to iterate over and pass to getKeyPattern.\n * @param getKeyPattern Function used to turn each of the keys into a regex.\n * @param formatValue Formats the value that will replace any matches of the pattern returned by\n *  `getKeyPattern`.\n */\nfunction renameSymbols(content: string,\n                       mapping: Record<string, string>,\n                       namespaces: string[],\n                       getKeyPattern: (namespace: string|null, key: string) => RegExp,\n                       formatValue: (key: string) => string): string {\n  // The null at the end is so that we make one last pass to cover non-namespaced symbols.\n  [...namespaces.slice().sort(sortLengthDescending), null].forEach(namespace => {\n    // Migrate the longest keys first so that our regex-based replacements don't accidentally\n    // capture keys that contain other keys. E.g. `$mat-blue` is contained within `$mat-blue-grey`.\n    Object.keys(mapping).sort(sortLengthDescending).forEach(key => {\n      const pattern = getKeyPattern(namespace, key);\n\n      // Sanity check since non-global regexes will only replace the first match.\n      if (pattern.flags.indexOf('g') === -1) {\n        throw Error('Replacement pattern must be global.');\n      }\n\n      content = content.replace(pattern, formatValue(mapping[key]));\n    });\n  });\n\n  return content;\n}\n\n/** Inserts an `@use` statement in a string. */\nfunction insertUseStatement(content: string, importPath: string, importsToIgnore: string[],\n                            namespace: string): string {\n  // If the content already has the `@use` import, we don't need to add anything.\n  const alreadyImportedPattern = new RegExp(`@use +['\"]${importPath}['\"]`, 'g');\n  if (alreadyImportedPattern.test(content)) {\n    return content;\n  }\n\n  // We want to find the first import that isn't in the list of ignored imports or find nothing,\n  // because the imports being replaced might be the only ones in the file and they can be further\n  // down. An easy way to do this is to replace the imports with a random character and run\n  // `indexOf` on the result. This isn't the most efficient way of doing it, but it's more compact\n  // and it allows us to easily deal with things like comment nodes.\n  const contentToSearch = importsToIgnore.reduce((accumulator, current) =>\n    accumulator.replace(current, '◬'.repeat(current.length)), content);\n\n  // Sass has a limitation that all `@use` declarations have to come before `@import` so we have\n  // to find the first import and insert before it. Technically we can get away with always\n  // inserting at 0, but the file may start with something like a license header.\n  const newImportIndex = Math.max(0, contentToSearch.indexOf('@import '));\n\n  return content.slice(0, newImportIndex) + `@use '${importPath}' as ${namespace};\\n` +\n         content.slice(newImportIndex);\n}\n\n/** Formats a migration key as a Sass mixin invocation. */\nfunction mixinKeyFormatter(namespace: string|null, name: string): RegExp {\n  // Note that adding a `(` at the end of the pattern would be more accurate, but mixin\n  // invocations don't necessarily have to include the parentheses. We could add `[(;]`,\n  // but then we won't know which character to include in the replacement string.\n  return new RegExp(`@include +${escapeRegExp((namespace ? namespace + '.' : '') + name)}`, 'g');\n}\n\n/** Returns a function that can be used to format a Sass mixin replacement. */\nfunction getMixinValueFormatter(namespace: string): (name: string) => string {\n  // Note that adding a `(` at the end of the pattern would be more accurate,\n  // but mixin invocations don't necessarily have to include the parentheses.\n  return name => `@include ${namespace}.${name}`;\n}\n\n/** Formats a migration key as a Sass function invocation. */\nfunction functionKeyFormatter(namespace: string|null, name: string): RegExp {\n  return new RegExp(escapeRegExp(`${namespace ? namespace + '.' : ''}${name}(`), 'g');\n}\n\n/** Returns a function that can be used to format a Sass function replacement. */\nfunction getFunctionValueFormatter(namespace: string): (name: string) => string {\n  return name => `${namespace}.${name}(`;\n}\n\n/** Formats a migration key as a Sass variable. */\nfunction variableKeyFormatter(namespace: string|null, name: string): RegExp {\n  return new RegExp(escapeRegExp(`${namespace ? namespace + '.' : ''}$${name}`), 'g');\n}\n\n/** Returns a function that can be used to format a Sass variable replacement. */\nfunction getVariableValueFormatter(namespace: string): (name: string) => string {\n  return name => `${namespace}.$${name}`;\n}\n\n/** Escapes special regex characters in a string. */\nfunction escapeRegExp(str: string): string {\n  return str.replace(/([.*+?^=!:${}()|[\\]\\/\\\\])/g, '\\\\$1');\n}\n\n/** Used with `Array.prototype.sort` to order strings in descending length. */\nfunction sortLengthDescending(a: string, b: string) {\n  return b.length - a.length;\n}\n\n/** Removes all strings from another string. */\nfunction removeStrings(content: string, toRemove: string[]): string {\n  return toRemove\n    .reduce((accumulator, current) => accumulator.replace(current, ''), content)\n    .replace(/^\\s+/, '');\n}\n\n/** Parses out the namespace from a Sass `@use` statement. */\nfunction extractNamespaceFromUseStatement(fullImport: string): string {\n  const closeQuoteIndex = Math.max(fullImport.lastIndexOf(`\"`), fullImport.lastIndexOf(`'`));\n\n  if (closeQuoteIndex > -1) {\n    const asExpression = 'as ';\n    const asIndex = fullImport.indexOf(asExpression, closeQuoteIndex);\n\n    // If we found an ` as ` expression, we consider the rest of the text as the namespace.\n    if (asIndex > -1) {\n      return fullImport.slice(asIndex + asExpression.length).split(';')[0].trim();\n    }\n\n    // Otherwise the namespace is the name of the file that is being imported.\n    const lastSlashIndex = fullImport.lastIndexOf('/', closeQuoteIndex);\n\n    if (lastSlashIndex > -1) {\n      const fileName = fullImport.slice(lastSlashIndex + 1, closeQuoteIndex)\n        // Sass allows for leading underscores to be omitted and it technically supports .scss.\n        .replace(/^_|(\\.import)?\\.scss$|\\.import$/g, '');\n\n      // Sass ignores `/index` and infers the namespace as the next segment in the path.\n      if (fileName === 'index') {\n        const nextSlashIndex = fullImport.lastIndexOf('/', lastSlashIndex - 1);\n\n        if (nextSlashIndex > -1) {\n          return fullImport.slice(nextSlashIndex + 1, lastSlashIndex);\n        }\n      } else {\n        return fileName;\n      }\n    }\n  }\n\n  throw Error(`Could not extract namespace from import \"${fullImport}\".`);\n}\n\n/**\n * Replaces variables that have been removed with their values.\n * @param content Content of the file to be migrated.\n * @param variables Mapping between variable names and their values.\n */\nfunction replaceRemovedVariables(content: string, variables: Record<string, string>): string {\n  Object.keys(variables).sort(sortLengthDescending).forEach(variableName => {\n    // Note that the pattern uses a negative lookahead to exclude\n    // variable assignments, because they can't be migrated.\n    const regex = new RegExp(`\\\\$${escapeRegExp(variableName)}(?!\\\\s+:|:)`, 'g');\n    content = content.replace(regex, variables[variableName]);\n  });\n\n  return content;\n}\n"]}