@angular/router
Version:
Angular - the routing library
282 lines (281 loc) • 40.8 kB
JavaScript
/**
* @license
* Copyright Google Inc. 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
*/
import * as tslib_1 from "tslib";
import { PRIMARY_OUTLET } from './shared';
import { UrlSegment, UrlSegmentGroup, UrlTree } from './url_tree';
import { forEach, last, shallowEqual } from './utils/collection';
export function createUrlTree(route, urlTree, commands, queryParams, fragment) {
if (commands.length === 0) {
return tree(urlTree.root, urlTree.root, urlTree, queryParams, fragment);
}
var nav = computeNavigation(commands);
if (nav.toRoot()) {
return tree(urlTree.root, new UrlSegmentGroup([], {}), urlTree, queryParams, fragment);
}
var startingPosition = findStartingPosition(nav, urlTree, route);
var segmentGroup = startingPosition.processChildren ?
updateSegmentGroupChildren(startingPosition.segmentGroup, startingPosition.index, nav.commands) :
updateSegmentGroup(startingPosition.segmentGroup, startingPosition.index, nav.commands);
return tree(startingPosition.segmentGroup, segmentGroup, urlTree, queryParams, fragment);
}
function isMatrixParams(command) {
return typeof command === 'object' && command != null && !command.outlets && !command.segmentPath;
}
function tree(oldSegmentGroup, newSegmentGroup, urlTree, queryParams, fragment) {
var qp = {};
if (queryParams) {
forEach(queryParams, function (value, name) {
qp[name] = Array.isArray(value) ? value.map(function (v) { return "" + v; }) : "" + value;
});
}
if (urlTree.root === oldSegmentGroup) {
return new UrlTree(newSegmentGroup, qp, fragment);
}
return new UrlTree(replaceSegment(urlTree.root, oldSegmentGroup, newSegmentGroup), qp, fragment);
}
function replaceSegment(current, oldSegment, newSegment) {
var children = {};
forEach(current.children, function (c, outletName) {
if (c === oldSegment) {
children[outletName] = newSegment;
}
else {
children[outletName] = replaceSegment(c, oldSegment, newSegment);
}
});
return new UrlSegmentGroup(current.segments, children);
}
var Navigation = /** @class */ (function () {
function Navigation(isAbsolute, numberOfDoubleDots, commands) {
this.isAbsolute = isAbsolute;
this.numberOfDoubleDots = numberOfDoubleDots;
this.commands = commands;
if (isAbsolute && commands.length > 0 && isMatrixParams(commands[0])) {
throw new Error('Root segment cannot have matrix parameters');
}
var cmdWithOutlet = commands.find(function (c) { return typeof c === 'object' && c != null && c.outlets; });
if (cmdWithOutlet && cmdWithOutlet !== last(commands)) {
throw new Error('{outlets:{}} has to be the last command');
}
}
Navigation.prototype.toRoot = function () {
return this.isAbsolute && this.commands.length === 1 && this.commands[0] == '/';
};
return Navigation;
}());
/** Transforms commands to a normalized `Navigation` */
function computeNavigation(commands) {
if ((typeof commands[0] === 'string') && commands.length === 1 && commands[0] === '/') {
return new Navigation(true, 0, commands);
}
var numberOfDoubleDots = 0;
var isAbsolute = false;
var res = commands.reduce(function (res, cmd, cmdIdx) {
if (typeof cmd === 'object' && cmd != null) {
if (cmd.outlets) {
var outlets_1 = {};
forEach(cmd.outlets, function (commands, name) {
outlets_1[name] = typeof commands === 'string' ? commands.split('/') : commands;
});
return tslib_1.__spread(res, [{ outlets: outlets_1 }]);
}
if (cmd.segmentPath) {
return tslib_1.__spread(res, [cmd.segmentPath]);
}
}
if (!(typeof cmd === 'string')) {
return tslib_1.__spread(res, [cmd]);
}
if (cmdIdx === 0) {
cmd.split('/').forEach(function (urlPart, partIndex) {
if (partIndex == 0 && urlPart === '.') {
// skip './a'
}
else if (partIndex == 0 && urlPart === '') { // '/a'
isAbsolute = true;
}
else if (urlPart === '..') { // '../a'
numberOfDoubleDots++;
}
else if (urlPart != '') {
res.push(urlPart);
}
});
return res;
}
return tslib_1.__spread(res, [cmd]);
}, []);
return new Navigation(isAbsolute, numberOfDoubleDots, res);
}
var Position = /** @class */ (function () {
function Position(segmentGroup, processChildren, index) {
this.segmentGroup = segmentGroup;
this.processChildren = processChildren;
this.index = index;
}
return Position;
}());
function findStartingPosition(nav, tree, route) {
if (nav.isAbsolute) {
return new Position(tree.root, true, 0);
}
if (route.snapshot._lastPathIndex === -1) {
return new Position(route.snapshot._urlSegment, true, 0);
}
var modifier = isMatrixParams(nav.commands[0]) ? 0 : 1;
var index = route.snapshot._lastPathIndex + modifier;
return createPositionApplyingDoubleDots(route.snapshot._urlSegment, index, nav.numberOfDoubleDots);
}
function createPositionApplyingDoubleDots(group, index, numberOfDoubleDots) {
var g = group;
var ci = index;
var dd = numberOfDoubleDots;
while (dd > ci) {
dd -= ci;
g = g.parent;
if (!g) {
throw new Error('Invalid number of \'../\'');
}
ci = g.segments.length;
}
return new Position(g, false, ci - dd);
}
function getPath(command) {
if (typeof command === 'object' && command != null && command.outlets) {
return command.outlets[PRIMARY_OUTLET];
}
return "" + command;
}
function getOutlets(commands) {
var _a, _b;
if (!(typeof commands[0] === 'object'))
return _a = {}, _a[PRIMARY_OUTLET] = commands, _a;
if (commands[0].outlets === undefined)
return _b = {}, _b[PRIMARY_OUTLET] = commands, _b;
return commands[0].outlets;
}
function updateSegmentGroup(segmentGroup, startIndex, commands) {
if (!segmentGroup) {
segmentGroup = new UrlSegmentGroup([], {});
}
if (segmentGroup.segments.length === 0 && segmentGroup.hasChildren()) {
return updateSegmentGroupChildren(segmentGroup, startIndex, commands);
}
var m = prefixedWith(segmentGroup, startIndex, commands);
var slicedCommands = commands.slice(m.commandIndex);
if (m.match && m.pathIndex < segmentGroup.segments.length) {
var g = new UrlSegmentGroup(segmentGroup.segments.slice(0, m.pathIndex), {});
g.children[PRIMARY_OUTLET] =
new UrlSegmentGroup(segmentGroup.segments.slice(m.pathIndex), segmentGroup.children);
return updateSegmentGroupChildren(g, 0, slicedCommands);
}
else if (m.match && slicedCommands.length === 0) {
return new UrlSegmentGroup(segmentGroup.segments, {});
}
else if (m.match && !segmentGroup.hasChildren()) {
return createNewSegmentGroup(segmentGroup, startIndex, commands);
}
else if (m.match) {
return updateSegmentGroupChildren(segmentGroup, 0, slicedCommands);
}
else {
return createNewSegmentGroup(segmentGroup, startIndex, commands);
}
}
function updateSegmentGroupChildren(segmentGroup, startIndex, commands) {
if (commands.length === 0) {
return new UrlSegmentGroup(segmentGroup.segments, {});
}
else {
var outlets_2 = getOutlets(commands);
var children_1 = {};
forEach(outlets_2, function (commands, outlet) {
if (commands !== null) {
children_1[outlet] = updateSegmentGroup(segmentGroup.children[outlet], startIndex, commands);
}
});
forEach(segmentGroup.children, function (child, childOutlet) {
if (outlets_2[childOutlet] === undefined) {
children_1[childOutlet] = child;
}
});
return new UrlSegmentGroup(segmentGroup.segments, children_1);
}
}
function prefixedWith(segmentGroup, startIndex, commands) {
var currentCommandIndex = 0;
var currentPathIndex = startIndex;
var noMatch = { match: false, pathIndex: 0, commandIndex: 0 };
while (currentPathIndex < segmentGroup.segments.length) {
if (currentCommandIndex >= commands.length)
return noMatch;
var path = segmentGroup.segments[currentPathIndex];
var curr = getPath(commands[currentCommandIndex]);
var next = currentCommandIndex < commands.length - 1 ? commands[currentCommandIndex + 1] : null;
if (currentPathIndex > 0 && curr === undefined)
break;
if (curr && next && (typeof next === 'object') && next.outlets === undefined) {
if (!compare(curr, next, path))
return noMatch;
currentCommandIndex += 2;
}
else {
if (!compare(curr, {}, path))
return noMatch;
currentCommandIndex++;
}
currentPathIndex++;
}
return { match: true, pathIndex: currentPathIndex, commandIndex: currentCommandIndex };
}
function createNewSegmentGroup(segmentGroup, startIndex, commands) {
var paths = segmentGroup.segments.slice(0, startIndex);
var i = 0;
while (i < commands.length) {
if (typeof commands[i] === 'object' && commands[i].outlets !== undefined) {
var children = createNewSegmentChildren(commands[i].outlets);
return new UrlSegmentGroup(paths, children);
}
// if we start with an object literal, we need to reuse the path part from the segment
if (i === 0 && isMatrixParams(commands[0])) {
var p = segmentGroup.segments[startIndex];
paths.push(new UrlSegment(p.path, commands[0]));
i++;
continue;
}
var curr = getPath(commands[i]);
var next = (i < commands.length - 1) ? commands[i + 1] : null;
if (curr && next && isMatrixParams(next)) {
paths.push(new UrlSegment(curr, stringify(next)));
i += 2;
}
else {
paths.push(new UrlSegment(curr, {}));
i++;
}
}
return new UrlSegmentGroup(paths, {});
}
function createNewSegmentChildren(outlets) {
var children = {};
forEach(outlets, function (commands, outlet) {
if (commands !== null) {
children[outlet] = createNewSegmentGroup(new UrlSegmentGroup([], {}), 0, commands);
}
});
return children;
}
function stringify(params) {
var res = {};
forEach(params, function (v, k) { return res[k] = "" + v; });
return res;
}
function compare(path, params, segment) {
return path == segment.path && shallowEqual(params, segment.parameters);
}
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* @license\n * Copyright Google Inc. 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 {ActivatedRoute} from './router_state';\nimport {PRIMARY_OUTLET, Params} from './shared';\nimport {UrlSegment, UrlSegmentGroup, UrlTree} from './url_tree';\nimport {forEach, last, shallowEqual} from './utils/collection';\n\nexport function createUrlTree(\n    route: ActivatedRoute, urlTree: UrlTree, commands: any[], queryParams: Params,\n    fragment: string): UrlTree {\n  if (commands.length === 0) {\n    return tree(urlTree.root, urlTree.root, urlTree, queryParams, fragment);\n  }\n\n  const nav = computeNavigation(commands);\n\n  if (nav.toRoot()) {\n    return tree(urlTree.root, new UrlSegmentGroup([], {}), urlTree, queryParams, fragment);\n  }\n\n  const startingPosition = findStartingPosition(nav, urlTree, route);\n\n  const segmentGroup = startingPosition.processChildren ?\n      updateSegmentGroupChildren(\n          startingPosition.segmentGroup, startingPosition.index, nav.commands) :\n      updateSegmentGroup(startingPosition.segmentGroup, startingPosition.index, nav.commands);\n  return tree(startingPosition.segmentGroup, segmentGroup, urlTree, queryParams, fragment);\n}\n\nfunction isMatrixParams(command: any): boolean {\n  return typeof command === 'object' && command != null && !command.outlets && !command.segmentPath;\n}\n\nfunction tree(\n    oldSegmentGroup: UrlSegmentGroup, newSegmentGroup: UrlSegmentGroup, urlTree: UrlTree,\n    queryParams: Params, fragment: string): UrlTree {\n  let qp: any = {};\n  if (queryParams) {\n    forEach(queryParams, (value: any, name: any) => {\n      qp[name] = Array.isArray(value) ? value.map((v: any) => `${v}`) : `${value}`;\n    });\n  }\n\n  if (urlTree.root === oldSegmentGroup) {\n    return new UrlTree(newSegmentGroup, qp, fragment);\n  }\n\n  return new UrlTree(replaceSegment(urlTree.root, oldSegmentGroup, newSegmentGroup), qp, fragment);\n}\n\nfunction replaceSegment(\n    current: UrlSegmentGroup, oldSegment: UrlSegmentGroup,\n    newSegment: UrlSegmentGroup): UrlSegmentGroup {\n  const children: {[key: string]: UrlSegmentGroup} = {};\n  forEach(current.children, (c: UrlSegmentGroup, outletName: string) => {\n    if (c === oldSegment) {\n      children[outletName] = newSegment;\n    } else {\n      children[outletName] = replaceSegment(c, oldSegment, newSegment);\n    }\n  });\n  return new UrlSegmentGroup(current.segments, children);\n}\n\nclass Navigation {\n  constructor(\n      public isAbsolute: boolean, public numberOfDoubleDots: number, public commands: any[]) {\n    if (isAbsolute && commands.length > 0 && isMatrixParams(commands[0])) {\n      throw new Error('Root segment cannot have matrix parameters');\n    }\n\n    const cmdWithOutlet = commands.find(c => typeof c === 'object' && c != null && c.outlets);\n    if (cmdWithOutlet && cmdWithOutlet !== last(commands)) {\n      throw new Error('{outlets:{}} has to be the last command');\n    }\n  }\n\n  public toRoot(): boolean {\n    return this.isAbsolute && this.commands.length === 1 && this.commands[0] == '/';\n  }\n}\n\n/** Transforms commands to a normalized `Navigation` */\nfunction computeNavigation(commands: any[]): Navigation {\n  if ((typeof commands[0] === 'string') && commands.length === 1 && commands[0] === '/') {\n    return new Navigation(true, 0, commands);\n  }\n\n  let numberOfDoubleDots = 0;\n  let isAbsolute = false;\n\n  const res: any[] = commands.reduce((res, cmd, cmdIdx) => {\n    if (typeof cmd === 'object' && cmd != null) {\n      if (cmd.outlets) {\n        const outlets: {[k: string]: any} = {};\n        forEach(cmd.outlets, (commands: any, name: string) => {\n          outlets[name] = typeof commands === 'string' ? commands.split('/') : commands;\n        });\n        return [...res, {outlets}];\n      }\n\n      if (cmd.segmentPath) {\n        return [...res, cmd.segmentPath];\n      }\n    }\n\n    if (!(typeof cmd === 'string')) {\n      return [...res, cmd];\n    }\n\n    if (cmdIdx === 0) {\n      cmd.split('/').forEach((urlPart, partIndex) => {\n        if (partIndex == 0 && urlPart === '.') {\n          // skip './a'\n        } else if (partIndex == 0 && urlPart === '') {  //  '/a'\n          isAbsolute = true;\n        } else if (urlPart === '..') {  //  '../a'\n          numberOfDoubleDots++;\n        } else if (urlPart != '') {\n          res.push(urlPart);\n        }\n      });\n\n      return res;\n    }\n\n    return [...res, cmd];\n  }, []);\n\n  return new Navigation(isAbsolute, numberOfDoubleDots, res);\n}\n\nclass Position {\n  constructor(\n      public segmentGroup: UrlSegmentGroup, public processChildren: boolean, public index: number) {\n  }\n}\n\nfunction findStartingPosition(nav: Navigation, tree: UrlTree, route: ActivatedRoute): Position {\n  if (nav.isAbsolute) {\n    return new Position(tree.root, true, 0);\n  }\n\n  if (route.snapshot._lastPathIndex === -1) {\n    return new Position(route.snapshot._urlSegment, true, 0);\n  }\n\n  const modifier = isMatrixParams(nav.commands[0]) ? 0 : 1;\n  const index = route.snapshot._lastPathIndex + modifier;\n  return createPositionApplyingDoubleDots(\n      route.snapshot._urlSegment, index, nav.numberOfDoubleDots);\n}\n\nfunction createPositionApplyingDoubleDots(\n    group: UrlSegmentGroup, index: number, numberOfDoubleDots: number): Position {\n  let g = group;\n  let ci = index;\n  let dd = numberOfDoubleDots;\n  while (dd > ci) {\n    dd -= ci;\n    g = g.parent !;\n    if (!g) {\n      throw new Error('Invalid number of \\'../\\'');\n    }\n    ci = g.segments.length;\n  }\n  return new Position(g, false, ci - dd);\n}\n\nfunction getPath(command: any): any {\n  if (typeof command === 'object' && command != null && command.outlets) {\n    return command.outlets[PRIMARY_OUTLET];\n  }\n  return `${command}`;\n}\n\nfunction getOutlets(commands: any[]): {[k: string]: any[]} {\n  if (!(typeof commands[0] === 'object')) return {[PRIMARY_OUTLET]: commands};\n  if (commands[0].outlets === undefined) return {[PRIMARY_OUTLET]: commands};\n  return commands[0].outlets;\n}\n\nfunction updateSegmentGroup(\n    segmentGroup: UrlSegmentGroup, startIndex: number, commands: any[]): UrlSegmentGroup {\n  if (!segmentGroup) {\n    segmentGroup = new UrlSegmentGroup([], {});\n  }\n  if (segmentGroup.segments.length === 0 && segmentGroup.hasChildren()) {\n    return updateSegmentGroupChildren(segmentGroup, startIndex, commands);\n  }\n\n  const m = prefixedWith(segmentGroup, startIndex, commands);\n  const slicedCommands = commands.slice(m.commandIndex);\n  if (m.match && m.pathIndex < segmentGroup.segments.length) {\n    const g = new UrlSegmentGroup(segmentGroup.segments.slice(0, m.pathIndex), {});\n    g.children[PRIMARY_OUTLET] =\n        new UrlSegmentGroup(segmentGroup.segments.slice(m.pathIndex), segmentGroup.children);\n    return updateSegmentGroupChildren(g, 0, slicedCommands);\n  } else if (m.match && slicedCommands.length === 0) {\n    return new UrlSegmentGroup(segmentGroup.segments, {});\n  } else if (m.match && !segmentGroup.hasChildren()) {\n    return createNewSegmentGroup(segmentGroup, startIndex, commands);\n  } else if (m.match) {\n    return updateSegmentGroupChildren(segmentGroup, 0, slicedCommands);\n  } else {\n    return createNewSegmentGroup(segmentGroup, startIndex, commands);\n  }\n}\n\nfunction updateSegmentGroupChildren(\n    segmentGroup: UrlSegmentGroup, startIndex: number, commands: any[]): UrlSegmentGroup {\n  if (commands.length === 0) {\n    return new UrlSegmentGroup(segmentGroup.segments, {});\n  } else {\n    const outlets = getOutlets(commands);\n    const children: {[key: string]: UrlSegmentGroup} = {};\n\n    forEach(outlets, (commands: any, outlet: string) => {\n      if (commands !== null) {\n        children[outlet] = updateSegmentGroup(segmentGroup.children[outlet], startIndex, commands);\n      }\n    });\n\n    forEach(segmentGroup.children, (child: UrlSegmentGroup, childOutlet: string) => {\n      if (outlets[childOutlet] === undefined) {\n        children[childOutlet] = child;\n      }\n    });\n    return new UrlSegmentGroup(segmentGroup.segments, children);\n  }\n}\n\nfunction prefixedWith(segmentGroup: UrlSegmentGroup, startIndex: number, commands: any[]) {\n  let currentCommandIndex = 0;\n  let currentPathIndex = startIndex;\n\n  const noMatch = {match: false, pathIndex: 0, commandIndex: 0};\n  while (currentPathIndex < segmentGroup.segments.length) {\n    if (currentCommandIndex >= commands.length) return noMatch;\n    const path = segmentGroup.segments[currentPathIndex];\n    const curr = getPath(commands[currentCommandIndex]);\n    const next =\n        currentCommandIndex < commands.length - 1 ? commands[currentCommandIndex + 1] : null;\n\n    if (currentPathIndex > 0 && curr === undefined) break;\n\n    if (curr && next && (typeof next === 'object') && next.outlets === undefined) {\n      if (!compare(curr, next, path)) return noMatch;\n      currentCommandIndex += 2;\n    } else {\n      if (!compare(curr, {}, path)) return noMatch;\n      currentCommandIndex++;\n    }\n    currentPathIndex++;\n  }\n\n  return {match: true, pathIndex: currentPathIndex, commandIndex: currentCommandIndex};\n}\n\nfunction createNewSegmentGroup(\n    segmentGroup: UrlSegmentGroup, startIndex: number, commands: any[]): UrlSegmentGroup {\n  const paths = segmentGroup.segments.slice(0, startIndex);\n\n  let i = 0;\n  while (i < commands.length) {\n    if (typeof commands[i] === 'object' && commands[i].outlets !== undefined) {\n      const children = createNewSegmentChildren(commands[i].outlets);\n      return new UrlSegmentGroup(paths, children);\n    }\n\n    // if we start with an object literal, we need to reuse the path part from the segment\n    if (i === 0 && isMatrixParams(commands[0])) {\n      const p = segmentGroup.segments[startIndex];\n      paths.push(new UrlSegment(p.path, commands[0]));\n      i++;\n      continue;\n    }\n\n    const curr = getPath(commands[i]);\n    const next = (i < commands.length - 1) ? commands[i + 1] : null;\n    if (curr && next && isMatrixParams(next)) {\n      paths.push(new UrlSegment(curr, stringify(next)));\n      i += 2;\n    } else {\n      paths.push(new UrlSegment(curr, {}));\n      i++;\n    }\n  }\n  return new UrlSegmentGroup(paths, {});\n}\n\nfunction createNewSegmentChildren(outlets: {[name: string]: any}): any {\n  const children: {[key: string]: UrlSegmentGroup} = {};\n  forEach(outlets, (commands: any, outlet: string) => {\n    if (commands !== null) {\n      children[outlet] = createNewSegmentGroup(new UrlSegmentGroup([], {}), 0, commands);\n    }\n  });\n  return children;\n}\n\nfunction stringify(params: {[key: string]: any}): {[key: string]: string} {\n  const res: {[key: string]: string} = {};\n  forEach(params, (v: any, k: string) => res[k] = `${v}`);\n  return res;\n}\n\nfunction compare(path: string, params: {[key: string]: any}, segment: UrlSegment): boolean {\n  return path == segment.path && shallowEqual(params, segment.parameters);\n}\n"]}