1 | /**
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2 | * @license
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3 | * Copyright Google LLC All Rights Reserved.
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4 | *
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5 | * Use of this source code is governed by an MIT-style license that can be
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6 | * found in the LICENSE file at https://angular.io/license
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7 | */
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8 | import { newArray } from '../../util/array_utils';
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9 | import { DECLARATION_COMPONENT_VIEW, HEADER_OFFSET, T_HOST } from '../interfaces/view';
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10 | import { applyProjection } from '../node_manipulation';
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11 | import { getProjectAsAttrValue, isNodeMatchingSelectorList, isSelectorInSelectorList } from '../node_selector_matcher';
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12 | import { getLView, getTView, setCurrentTNodeAsNotParent } from '../state';
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13 | import { getOrCreateTNode } from './shared';
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14 | /**
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15 | * Checks a given node against matching projection slots and returns the
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16 | * determined slot index. Returns "null" if no slot matched the given node.
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17 | *
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18 | * This function takes into account the parsed ngProjectAs selector from the
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19 | * node's attributes. If present, it will check whether the ngProjectAs selector
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20 | * matches any of the projection slot selectors.
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21 | */
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22 | export function matchingProjectionSlotIndex(tNode, projectionSlots) {
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23 | let wildcardNgContentIndex = null;
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24 | const ngProjectAsAttrVal = getProjectAsAttrValue(tNode);
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25 | for (let i = 0; i < projectionSlots.length; i++) {
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26 | const slotValue = projectionSlots[i];
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27 | // The last wildcard projection slot should match all nodes which aren't matching
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28 | // any selector. This is necessary to be backwards compatible with view engine.
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29 | if (slotValue === '*') {
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30 | wildcardNgContentIndex = i;
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31 | continue;
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32 | }
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33 | // If we ran into an `ngProjectAs` attribute, we should match its parsed selector
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34 | // to the list of selectors, otherwise we fall back to matching against the node.
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35 | if (ngProjectAsAttrVal === null ?
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36 | isNodeMatchingSelectorList(tNode, slotValue, /* isProjectionMode */ true) :
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37 | isSelectorInSelectorList(ngProjectAsAttrVal, slotValue)) {
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38 | return i; // first matching selector "captures" a given node
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39 | }
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40 | }
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41 | return wildcardNgContentIndex;
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42 | }
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43 | /**
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44 | * Instruction to distribute projectable nodes among <ng-content> occurrences in a given template.
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45 | * It takes all the selectors from the entire component's template and decides where
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46 | * each projected node belongs (it re-distributes nodes among "buckets" where each "bucket" is
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47 | * backed by a selector).
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48 | *
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49 | * This function requires CSS selectors to be provided in 2 forms: parsed (by a compiler) and text,
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50 | * un-parsed form.
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51 | *
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52 | * The parsed form is needed for efficient matching of a node against a given CSS selector.
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53 | * The un-parsed, textual form is needed for support of the ngProjectAs attribute.
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54 | *
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55 | * Having a CSS selector in 2 different formats is not ideal, but alternatives have even more
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56 | * drawbacks:
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57 | * - having only a textual form would require runtime parsing of CSS selectors;
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58 | * - we can't have only a parsed as we can't re-construct textual form from it (as entered by a
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59 | * template author).
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60 | *
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61 | * @param projectionSlots? A collection of projection slots. A projection slot can be based
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62 | * on a parsed CSS selectors or set to the wildcard selector ("*") in order to match
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63 | * all nodes which do not match any selector. If not specified, a single wildcard
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64 | * selector projection slot will be defined.
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65 | *
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66 | * @codeGenApi
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67 | */
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68 | export function ɵɵprojectionDef(projectionSlots) {
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69 | const componentNode = getLView()[DECLARATION_COMPONENT_VIEW][T_HOST];
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70 | if (!componentNode.projection) {
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71 | // If no explicit projection slots are defined, fall back to a single
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72 | // projection slot with the wildcard selector.
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73 | const numProjectionSlots = projectionSlots ? projectionSlots.length : 1;
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74 | const projectionHeads = componentNode.projection =
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75 | newArray(numProjectionSlots, null);
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76 | const tails = projectionHeads.slice();
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77 | let componentChild = componentNode.child;
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78 | while (componentChild !== null) {
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79 | const slotIndex = projectionSlots ? matchingProjectionSlotIndex(componentChild, projectionSlots) : 0;
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80 | if (slotIndex !== null) {
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81 | if (tails[slotIndex]) {
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82 | tails[slotIndex].projectionNext = componentChild;
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83 | }
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84 | else {
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85 | projectionHeads[slotIndex] = componentChild;
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86 | }
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87 | tails[slotIndex] = componentChild;
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88 | }
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89 | componentChild = componentChild.next;
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90 | }
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91 | }
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92 | }
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93 | /**
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94 | * Inserts previously re-distributed projected nodes. This instruction must be preceded by a call
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95 | * to the projectionDef instruction.
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96 | *
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97 | * @param nodeIndex
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98 | * @param selectorIndex:
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99 | * - 0 when the selector is `*` (or unspecified as this is the default value),
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100 | * - 1 based index of the selector from the {@link projectionDef}
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101 | *
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102 | * @codeGenApi
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103 | */
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104 | export function ɵɵprojection(nodeIndex, selectorIndex = 0, attrs) {
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105 | const lView = getLView();
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106 | const tView = getTView();
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107 | const tProjectionNode = getOrCreateTNode(tView, HEADER_OFFSET + nodeIndex, 16 /* Projection */, null, attrs || null);
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108 | // We can't use viewData[HOST_NODE] because projection nodes can be nested in embedded views.
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109 | if (tProjectionNode.projection === null)
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110 | tProjectionNode.projection = selectorIndex;
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111 | // `<ng-content>` has no content
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112 | setCurrentTNodeAsNotParent();
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113 | if ((tProjectionNode.flags & 64 /* isDetached */) !== 64 /* isDetached */) {
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114 | // re-distribution of projectable nodes is stored on a component's view level
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115 | applyProjection(tView, lView, tProjectionNode);
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116 | }
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117 | }
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118 | //# sourceMappingURL=data:application/json;base64,{"version":3,"file":"projection.js","sourceRoot":"","sources":["../../../../../../../../packages/core/src/render3/instructions/projection.ts"],"names":[],"mappings":"AAAA;;;;;;GAMG;AACH,OAAO,EAAC,QAAQ,EAAC,MAAM,wBAAwB,CAAC;AAGhD,OAAO,EAAC,0BAA0B,EAAE,aAAa,EAAE,MAAM,EAAC,MAAM,oBAAoB,CAAC;AACrF,OAAO,EAAC,eAAe,EAAC,MAAM,sBAAsB,CAAC;AACrD,OAAO,EAAC,qBAAqB,EAAE,0BAA0B,EAAE,wBAAwB,EAAC,MAAM,0BAA0B,CAAC;AACrH,OAAO,EAAC,QAAQ,EAAE,QAAQ,EAAE,0BAA0B,EAAC,MAAM,UAAU,CAAC;AACxE,OAAO,EAAC,gBAAgB,EAAC,MAAM,UAAU,CAAC;AAI1C;;;;;;;GAOG;AACH,MAAM,UAAU,2BAA2B,CAAC,KAAY,EAAE,eAAgC;IAExF,IAAI,sBAAsB,GAAG,IAAI,CAAC;IAClC,MAAM,kBAAkB,GAAG,qBAAqB,CAAC,KAAK,CAAC,CAAC;IACxD,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,eAAe,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE;QAC/C,MAAM,SAAS,GAAG,eAAe,CAAC,CAAC,CAAC,CAAC;QACrC,iFAAiF;QACjF,+EAA+E;QAC/E,IAAI,SAAS,KAAK,GAAG,EAAE;YACrB,sBAAsB,GAAG,CAAC,CAAC;YAC3B,SAAS;SACV;QACD,iFAAiF;QACjF,iFAAiF;QACjF,IAAI,kBAAkB,KAAK,IAAI,CAAC,CAAC;YACzB,0BAA0B,CAAC,KAAK,EAAE,SAAS,EAAE,sBAAsB,CAAC,IAAI,CAAC,CAAC,CAAC;YAC3E,wBAAwB,CAAC,kBAAkB,EAAE,SAAS,CAAC,EAAE;YAC/D,OAAO,CAAC,CAAC,CAAE,kDAAkD;SAC9D;KACF;IACD,OAAO,sBAAsB,CAAC;AAChC,CAAC;AAED;;;;;;;;;;;;;;;;;;;;;;;;GAwBG;AACH,MAAM,UAAU,eAAe,CAAC,eAAiC;IAC/D,MAAM,aAAa,GAAG,QAAQ,EAAE,CAAC,0BAA0B,CAAC,CAAC,MAAM,CAAiB,CAAC;IAErF,IAAI,CAAC,aAAa,CAAC,UAAU,EAAE;QAC7B,qEAAqE;QACrE,8CAA8C;QAC9C,MAAM,kBAAkB,GAAG,eAAe,CAAC,CAAC,CAAC,eAAe,CAAC,MAAM,CAAC,CAAC,CAAC,CAAC,CAAC;QACxE,MAAM,eAAe,GAAmB,aAAa,CAAC,UAAU;YAC5D,QAAQ,CAAC,kBAAkB,EAAE,IAAc,CAAC,CAAC;QACjD,MAAM,KAAK,GAAmB,eAAe,CAAC,KAAK,EAAE,CAAC;QAEtD,IAAI,cAAc,GAAe,aAAa,CAAC,KAAK,CAAC;QAErD,OAAO,cAAc,KAAK,IAAI,EAAE;YAC9B,MAAM,SAAS,GACX,eAAe,CAAC,CAAC,CAAC,2BAA2B,CAAC,cAAc,EAAE,eAAe,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;YAEvF,IAAI,SAAS,KAAK,IAAI,EAAE;gBACtB,IAAI,KAAK,CAAC,SAAS,CAAC,EAAE;oBACpB,KAAK,CAAC,SAAS,CAAE,CAAC,cAAc,GAAG,cAAc,CAAC;iBACnD;qBAAM;oBACL,eAAe,CAAC,SAAS,CAAC,GAAG,cAAc,CAAC;iBAC7C;gBACD,KAAK,CAAC,SAAS,CAAC,GAAG,cAAc,CAAC;aACnC;YAED,cAAc,GAAG,cAAc,CAAC,IAAI,CAAC;SACtC;KACF;AACH,CAAC;AAGD;;;;;;;;;;GAUG;AACH,MAAM,UAAU,YAAY,CACxB,SAAiB,EAAE,gBAAwB,CAAC,EAAE,KAAmB;IACnE,MAAM,KAAK,GAAG,QAAQ,EAAE,CAAC;IACzB,MAAM,KAAK,GAAG,QAAQ,EAAE,CAAC;IACzB,MAAM,eAAe,GACjB,gBAAgB,CAAC,KAAK,EAAE,aAAa,GAAG,SAAS,uBAAwB,IAAI,EAAE,KAAK,IAAI,IAAI,CAAC,CAAC;IAElG,6FAA6F;IAC7F,IAAI,eAAe,CAAC,UAAU,KAAK,IAAI;QAAE,eAAe,CAAC,UAAU,GAAG,aAAa,CAAC;IAEpF,gCAAgC;IAChC,0BAA0B,EAAE,CAAC;IAE7B,IAAI,CAAC,eAAe,CAAC,KAAK,sBAAwB,CAAC,wBAA0B,EAAE;QAC7E,6EAA6E;QAC7E,eAAe,CAAC,KAAK,EAAE,KAAK,EAAE,eAAe,CAAC,CAAC;KAChD;AACH,CAAC","sourcesContent":["/**\n * @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 */\nimport {newArray} from '../../util/array_utils';\nimport {TAttributes, TElementNode, TNode, TNodeFlags, TNodeType} from '../interfaces/node';\nimport {ProjectionSlots} from '../interfaces/projection';\nimport {DECLARATION_COMPONENT_VIEW, HEADER_OFFSET, T_HOST} from '../interfaces/view';\nimport {applyProjection} from '../node_manipulation';\nimport {getProjectAsAttrValue, isNodeMatchingSelectorList, isSelectorInSelectorList} from '../node_selector_matcher';\nimport {getLView, getTView, setCurrentTNodeAsNotParent} from '../state';\nimport {getOrCreateTNode} from './shared';\n\n\n\n/**\n * Checks a given node against matching projection slots and returns the\n * determined slot index. Returns \"null\" if no slot matched the given node.\n *\n * This function takes into account the parsed ngProjectAs selector from the\n * node's attributes. If present, it will check whether the ngProjectAs selector\n * matches any of the projection slot selectors.\n */\nexport function matchingProjectionSlotIndex(tNode: TNode, projectionSlots: ProjectionSlots): number|\n    null {\n  let wildcardNgContentIndex = null;\n  const ngProjectAsAttrVal = getProjectAsAttrValue(tNode);\n  for (let i = 0; i < projectionSlots.length; i++) {\n    const slotValue = projectionSlots[i];\n    // The last wildcard projection slot should match all nodes which aren't matching\n    // any selector. This is necessary to be backwards compatible with view engine.\n    if (slotValue === '*') {\n      wildcardNgContentIndex = i;\n      continue;\n    }\n    // If we ran into an `ngProjectAs` attribute, we should match its parsed selector\n    // to the list of selectors, otherwise we fall back to matching against the node.\n    if (ngProjectAsAttrVal === null ?\n            isNodeMatchingSelectorList(tNode, slotValue, /* isProjectionMode */ true) :\n            isSelectorInSelectorList(ngProjectAsAttrVal, slotValue)) {\n      return i;  // first matching selector \"captures\" a given node\n    }\n  }\n  return wildcardNgContentIndex;\n}\n\n/**\n * Instruction to distribute projectable nodes among <ng-content> occurrences in a given template.\n * It takes all the selectors from the entire component's template and decides where\n * each projected node belongs (it re-distributes nodes among \"buckets\" where each \"bucket\" is\n * backed by a selector).\n *\n * This function requires CSS selectors to be provided in 2 forms: parsed (by a compiler) and text,\n * un-parsed form.\n *\n * The parsed form is needed for efficient matching of a node against a given CSS selector.\n * The un-parsed, textual form is needed for support of the ngProjectAs attribute.\n *\n * Having a CSS selector in 2 different formats is not ideal, but alternatives have even more\n * drawbacks:\n * - having only a textual form would require runtime parsing of CSS selectors;\n * - we can't have only a parsed as we can't re-construct textual form from it (as entered by a\n * template author).\n *\n * @param projectionSlots? A collection of projection slots. A projection slot can be based\n *        on a parsed CSS selectors or set to the wildcard selector (\"*\") in order to match\n *        all nodes which do not match any selector. If not specified, a single wildcard\n *        selector projection slot will be defined.\n *\n * @codeGenApi\n */\nexport function ɵɵprojectionDef(projectionSlots?: ProjectionSlots): void {\n  const componentNode = getLView()[DECLARATION_COMPONENT_VIEW][T_HOST] as TElementNode;\n\n  if (!componentNode.projection) {\n    // If no explicit projection slots are defined, fall back to a single\n    // projection slot with the wildcard selector.\n    const numProjectionSlots = projectionSlots ? projectionSlots.length : 1;\n    const projectionHeads: (TNode|null)[] = componentNode.projection =\n        newArray(numProjectionSlots, null! as TNode);\n    const tails: (TNode|null)[] = projectionHeads.slice();\n\n    let componentChild: TNode|null = componentNode.child;\n\n    while (componentChild !== null) {\n      const slotIndex =\n          projectionSlots ? matchingProjectionSlotIndex(componentChild, projectionSlots) : 0;\n\n      if (slotIndex !== null) {\n        if (tails[slotIndex]) {\n          tails[slotIndex]!.projectionNext = componentChild;\n        } else {\n          projectionHeads[slotIndex] = componentChild;\n        }\n        tails[slotIndex] = componentChild;\n      }\n\n      componentChild = componentChild.next;\n    }\n  }\n}\n\n\n/**\n * Inserts previously re-distributed projected nodes. This instruction must be preceded by a call\n * to the projectionDef instruction.\n *\n * @param nodeIndex\n * @param selectorIndex:\n *        - 0 when the selector is `*` (or unspecified as this is the default value),\n *        - 1 based index of the selector from the {@link projectionDef}\n *\n * @codeGenApi\n */\nexport function ɵɵprojection(\n    nodeIndex: number, selectorIndex: number = 0, attrs?: TAttributes): void {\n  const lView = getLView();\n  const tView = getTView();\n  const tProjectionNode =\n      getOrCreateTNode(tView, HEADER_OFFSET + nodeIndex, TNodeType.Projection, null, attrs || null);\n\n  // We can't use viewData[HOST_NODE] because projection nodes can be nested in embedded views.\n  if (tProjectionNode.projection === null) tProjectionNode.projection = selectorIndex;\n\n  // `<ng-content>` has no content\n  setCurrentTNodeAsNotParent();\n\n  if ((tProjectionNode.flags & TNodeFlags.isDetached) !== TNodeFlags.isDetached) {\n    // re-distribution of projectable nodes is stored on a component's view level\n    applyProjection(tView, lView, tProjectionNode);\n  }\n}\n"]} |
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