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{"version":3,"file":"drag-drop.mjs","sources":["../../../../../../src/cdk/drag-drop/dom/styling.ts","../../../../../../src/cdk/drag-drop/dom/transition-duration.ts","../../../../../../src/cdk/drag-drop/dom/client-rect.ts","../../../../../../src/cdk/drag-drop/dom/parent-position-tracker.ts","../../../../../../src/cdk/drag-drop/dom/clone-node.ts","../../../../../../src/cdk/drag-drop/drag-ref.ts","../../../../../../src/cdk/drag-drop/drag-utils.ts","../../../../../../src/cdk/drag-drop/sorting/single-axis-sort-strategy.ts","../../../../../../src/cdk/drag-drop/drop-list-ref.ts","../../../../../../src/cdk/drag-drop/drag-drop-registry.ts","../../../../../../src/cdk/drag-drop/drag-drop.ts","../../../../../../src/cdk/drag-drop/drag-parent.ts","../../../../../../src/cdk/drag-drop/directives/assertions.ts","../../../../../../src/cdk/drag-drop/directives/drag-handle.ts","../../../../../../src/cdk/drag-drop/directives/drag-placeholder.ts","../../../../../../src/cdk/drag-drop/directives/drag-preview.ts","../../../../../../src/cdk/drag-drop/directives/config.ts","../../../../../../src/cdk/drag-drop/directives/drag.ts","../../../../../../src/cdk/drag-drop/directives/drop-list-group.ts","../../../../../../src/cdk/drag-drop/directives/drop-list.ts","../../../../../../src/cdk/drag-drop/drag-drop-module.ts","../../../../../../src/cdk/drag-drop/drag-drop_public_index.ts"],"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 */\n\n/**\n * Extended CSSStyleDeclaration that includes a couple of drag-related\n * properties that aren't in the built-in TS typings.\n */\nexport interface DragCSSStyleDeclaration extends CSSStyleDeclaration {\n msScrollSnapType: string;\n scrollSnapType: string;\n webkitTapHighlightColor: string;\n}\n\n/**\n * Shallow-extends a stylesheet object with another stylesheet-like object.\n * Note that the keys in `source` have to be dash-cased.\n * @docs-private\n */\nexport function extendStyles(\n dest: CSSStyleDeclaration,\n source: Record<string, string>,\n importantProperties?: Set<string>,\n) {\n for (let key in source) {\n if (source.hasOwnProperty(key)) {\n const value = source[key];\n\n if (value) {\n dest.setProperty(key, value, importantProperties?.has(key) ? 'important' : '');\n } else {\n dest.removeProperty(key);\n }\n }\n }\n\n return dest;\n}\n\n/**\n * Toggles whether the native drag interactions should be enabled for an element.\n * @param element Element on which to toggle the drag interactions.\n * @param enable Whether the drag interactions should be enabled.\n * @docs-private\n */\nexport function toggleNativeDragInteractions(element: HTMLElement, enable: boolean) {\n const userSelect = enable ? '' : 'none';\n\n extendStyles(element.style, {\n 'touch-action': enable ? '' : 'none',\n '-webkit-user-drag': enable ? '' : 'none',\n '-webkit-tap-highlight-color': enable ? '' : 'transparent',\n 'user-select': userSelect,\n '-ms-user-select': userSelect,\n '-webkit-user-select': userSelect,\n '-moz-user-select': userSelect,\n });\n}\n\n/**\n * Toggles whether an element is visible while preserving its dimensions.\n * @param element Element whose visibility to toggle\n * @param enable Whether the element should be visible.\n * @param importantProperties Properties to be set as `!important`.\n * @docs-private\n */\nexport function toggleVisibility(\n element: HTMLElement,\n enable: boolean,\n importantProperties?: Set<string>,\n) {\n extendStyles(\n element.style,\n {\n position: enable ? '' : 'fixed',\n top: enable ? '' : '0',\n opacity: enable ? '' : '0',\n left: enable ? '' : '-999em',\n },\n importantProperties,\n );\n}\n\n/**\n * Combines a transform string with an optional other transform\n * that exited before the base transform was applied.\n */\nexport function combineTransforms(transform: string, initialTransform?: string): s
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