@angular/flex-layout
Version:
Angular Flex-Layout =======
174 lines • 23.3 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
*/
import { Inject, Injectable, PLATFORM_ID } from '@angular/core';
import { isPlatformBrowser, isPlatformServer } from '@angular/common';
import { applyCssPrefixes } from '@angular/flex-layout/_private-utils';
import { SERVER_TOKEN } from '../tokens/server-token';
import { LAYOUT_CONFIG } from '../tokens/library-config';
import * as i0 from "@angular/core";
import * as i1 from "../stylesheet-map/stylesheet-map";
export class StyleUtils {
constructor(_serverStylesheet, _serverModuleLoaded, _platformId, layoutConfig) {
this._serverStylesheet = _serverStylesheet;
this._serverModuleLoaded = _serverModuleLoaded;
this._platformId = _platformId;
this.layoutConfig = layoutConfig;
}
/**
* Applies styles given via string pair or object map to the directive element
*/
applyStyleToElement(element, style, value = null) {
let styles = {};
if (typeof style === 'string') {
styles[style] = value;
style = styles;
}
styles = this.layoutConfig.disableVendorPrefixes ? style : applyCssPrefixes(style);
this._applyMultiValueStyleToElement(styles, element);
}
/**
* Applies styles given via string pair or object map to the directive's element
*/
applyStyleToElements(style, elements = []) {
const styles = this.layoutConfig.disableVendorPrefixes ? style : applyCssPrefixes(style);
elements.forEach(el => {
this._applyMultiValueStyleToElement(styles, el);
});
}
/**
* Determine the DOM element's Flexbox flow (flex-direction)
*
* Check inline style first then check computed (stylesheet) style
*/
getFlowDirection(target) {
const query = 'flex-direction';
let value = this.lookupStyle(target, query);
const hasInlineValue = this.lookupInlineStyle(target, query) ||
(isPlatformServer(this._platformId) && this._serverModuleLoaded) ? value : '';
return [value || 'row', hasInlineValue];
}
hasWrap(target) {
const query = 'flex-wrap';
return this.lookupStyle(target, query) === 'wrap';
}
/**
* Find the DOM element's raw attribute value (if any)
*/
lookupAttributeValue(element, attribute) {
return element.getAttribute(attribute) ?? '';
}
/**
* Find the DOM element's inline style value (if any)
*/
lookupInlineStyle(element, styleName) {
return isPlatformBrowser(this._platformId) ?
element.style.getPropertyValue(styleName) : getServerStyle(element, styleName);
}
/**
* Determine the inline or inherited CSS style
* NOTE: platform-server has no implementation for getComputedStyle
*/
lookupStyle(element, styleName, inlineOnly = false) {
let value = '';
if (element) {
let immediateValue = value = this.lookupInlineStyle(element, styleName);
if (!immediateValue) {
if (isPlatformBrowser(this._platformId)) {
if (!inlineOnly) {
value = getComputedStyle(element).getPropertyValue(styleName);
}
}
else {
if (this._serverModuleLoaded) {
value = this._serverStylesheet.getStyleForElement(element, styleName);
}
}
}
}
// Note: 'inline' is the default of all elements, unless UA stylesheet overrides;
// in which case getComputedStyle() should determine a valid value.
return value ? value.trim() : '';
}
/**
* Applies the styles to the element. The styles object map may contain an array of values
* Each value will be added as element style
* Keys are sorted to add prefixed styles (like -webkit-x) first, before the standard ones
*/
_applyMultiValueStyleToElement(styles, element) {
Object.keys(styles).sort().forEach(key => {
const el = styles[key];
const values = Array.isArray(el) ? el : [el];
values.sort();
for (let value of values) {
value = value ? value + '' : '';
if (isPlatformBrowser(this._platformId) || !this._serverModuleLoaded) {
isPlatformBrowser(this._platformId) ?
element.style.setProperty(key, value) : setServerStyle(element, key, value);
}
else {
this._serverStylesheet.addStyleToElement(element, key, value);
}
}
});
}
}
StyleUtils.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "15.0.2", ngImport: i0, type: StyleUtils, deps: [{ token: i1.StylesheetMap }, { token: SERVER_TOKEN }, { token: PLATFORM_ID }, { token: LAYOUT_CONFIG }], target: i0.ɵɵFactoryTarget.Injectable });
StyleUtils.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "15.0.2", ngImport: i0, type: StyleUtils, providedIn: 'root' });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "15.0.2", ngImport: i0, type: StyleUtils, decorators: [{
type: Injectable,
args: [{ providedIn: 'root' }]
}], ctorParameters: function () { return [{ type: i1.StylesheetMap }, { type: undefined, decorators: [{
type: Inject,
args: [SERVER_TOKEN]
}] }, { type: Object, decorators: [{
type: Inject,
args: [PLATFORM_ID]
}] }, { type: undefined, decorators: [{
type: Inject,
args: [LAYOUT_CONFIG]
}] }]; } });
function getServerStyle(element, styleName) {
const styleMap = readStyleAttribute(element);
return styleMap[styleName] ?? '';
}
function setServerStyle(element, styleName, styleValue) {
styleName = styleName.replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();
const styleMap = readStyleAttribute(element);
styleMap[styleName] = styleValue ?? '';
writeStyleAttribute(element, styleMap);
}
function writeStyleAttribute(element, styleMap) {
let styleAttrValue = '';
for (const key in styleMap) {
const newValue = styleMap[key];
if (newValue) {
styleAttrValue += `${key}:${styleMap[key]};`;
}
}
element.setAttribute('style', styleAttrValue);
}
function readStyleAttribute(element) {
const styleMap = {};
const styleAttribute = element.getAttribute('style');
if (styleAttribute) {
const styleList = styleAttribute.split(/;+/g);
for (let i = 0; i < styleList.length; i++) {
const style = styleList[i].trim();
if (style.length > 0) {
const colonIndex = style.indexOf(':');
if (colonIndex === -1) {
throw new Error(`Invalid CSS style: ${style}`);
}
const name = style.substr(0, colonIndex).trim();
styleMap[name] = style.substr(colonIndex + 1).trim();
}
}
}
return styleMap;
}
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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 */\nimport {Inject, Injectable, PLATFORM_ID} from '@angular/core';\nimport {isPlatformBrowser, isPlatformServer} from '@angular/common';\n\nimport {applyCssPrefixes} from '@angular/flex-layout/_private-utils';\nimport {StylesheetMap} from '../stylesheet-map/stylesheet-map';\nimport {SERVER_TOKEN} from '../tokens/server-token';\nimport {LAYOUT_CONFIG, LayoutConfigOptions} from '../tokens/library-config';\n\n@Injectable({providedIn: 'root'})\nexport class StyleUtils {\n\n  constructor(private _serverStylesheet: StylesheetMap,\n              @Inject(SERVER_TOKEN) private _serverModuleLoaded: boolean,\n              @Inject(PLATFORM_ID) private _platformId: Object,\n              @Inject(LAYOUT_CONFIG) private layoutConfig: LayoutConfigOptions) {}\n\n  /**\n   * Applies styles given via string pair or object map to the directive element\n   */\n  applyStyleToElement(element: HTMLElement,\n                      style: StyleDefinition | string,\n                      value: string | number | null = null) {\n    let styles: StyleDefinition = {};\n    if (typeof style === 'string') {\n      styles[style] = value;\n      style = styles;\n    }\n    styles = this.layoutConfig.disableVendorPrefixes ? style : applyCssPrefixes(style);\n    this._applyMultiValueStyleToElement(styles, element);\n  }\n\n  /**\n   * Applies styles given via string pair or object map to the directive's element\n   */\n  applyStyleToElements(style: StyleDefinition, elements: HTMLElement[] = []) {\n    const styles = this.layoutConfig.disableVendorPrefixes ? style : applyCssPrefixes(style);\n    elements.forEach(el => {\n      this._applyMultiValueStyleToElement(styles, el);\n    });\n  }\n\n  /**\n   * Determine the DOM element's Flexbox flow (flex-direction)\n   *\n   * Check inline style first then check computed (stylesheet) style\n   */\n  getFlowDirection(target: HTMLElement): [string, string] {\n    const query = 'flex-direction';\n    let value = this.lookupStyle(target, query);\n    const hasInlineValue = this.lookupInlineStyle(target, query) ||\n    (isPlatformServer(this._platformId) && this._serverModuleLoaded) ? value : '';\n\n    return [value || 'row', hasInlineValue];\n  }\n\n  hasWrap(target: HTMLElement): boolean {\n    const query = 'flex-wrap';\n    return this.lookupStyle(target, query) === 'wrap';\n  }\n\n  /**\n   * Find the DOM element's raw attribute value (if any)\n   */\n  lookupAttributeValue(element: HTMLElement, attribute: string): string {\n    return element.getAttribute(attribute) ?? '';\n  }\n\n  /**\n   * Find the DOM element's inline style value (if any)\n   */\n  lookupInlineStyle(element: HTMLElement, styleName: string): string {\n    return isPlatformBrowser(this._platformId) ?\n      element.style.getPropertyValue(styleName) : getServerStyle(element, styleName);\n  }\n\n  /**\n   * Determine the inline or inherited CSS style\n   * NOTE: platform-server has no implementation for getComputedStyle\n   */\n  lookupStyle(element: HTMLElement, styleName: string, inlineOnly = false): string {\n    let value = '';\n    if (element) {\n      let immediateValue = value = this.lookupInlineStyle(element, styleName);\n      if (!immediateValue) {\n        if (isPlatformBrowser(this._platformId)) {\n          if (!inlineOnly) {\n            value = getComputedStyle(element).getPropertyValue(styleName);\n          }\n        } else {\n          if (this._serverModuleLoaded) {\n            value = this._serverStylesheet.getStyleForElement(element, styleName);\n          }\n        }\n      }\n    }\n\n    // Note: 'inline' is the default of all elements, unless UA stylesheet overrides;\n    //       in which case getComputedStyle() should determine a valid value.\n    return value ? value.trim() : '';\n  }\n\n  /**\n   * Applies the styles to the element. The styles object map may contain an array of values\n   * Each value will be added as element style\n   * Keys are sorted to add prefixed styles (like -webkit-x) first, before the standard ones\n   */\n  private _applyMultiValueStyleToElement(styles: StyleDefinition,\n                                         element: HTMLElement) {\n    Object.keys(styles).sort().forEach(key => {\n      const el = styles[key];\n      const values: (string | number | null)[] = Array.isArray(el) ? el : [el];\n      values.sort();\n      for (let value of values) {\n        value = value ? value + '' : '';\n        if (isPlatformBrowser(this._platformId) || !this._serverModuleLoaded) {\n          isPlatformBrowser(this._platformId) ?\n            element.style.setProperty(key, value) : setServerStyle(element, key, value);\n        } else {\n          this._serverStylesheet.addStyleToElement(element, key, value);\n        }\n      }\n    });\n  }\n}\n\nfunction getServerStyle(element: any, styleName: string): string {\n  const styleMap = readStyleAttribute(element);\n  return styleMap[styleName] ?? '';\n}\n\nfunction setServerStyle(element: any, styleName: string, styleValue?: string|null) {\n  styleName = styleName.replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();\n  const styleMap = readStyleAttribute(element);\n  styleMap[styleName] = styleValue ?? '';\n  writeStyleAttribute(element, styleMap);\n}\n\nfunction writeStyleAttribute(element: any, styleMap: {[name: string]: string}) {\n  let styleAttrValue = '';\n  for (const key in styleMap) {\n    const newValue = styleMap[key];\n    if (newValue) {\n      styleAttrValue += `${key}:${styleMap[key]};`;\n    }\n  }\n  element.setAttribute('style', styleAttrValue);\n}\n\nfunction readStyleAttribute(element: any): {[name: string]: string} {\n  const styleMap: {[name: string]: string} = {};\n  const styleAttribute = element.getAttribute('style');\n  if (styleAttribute) {\n    const styleList = styleAttribute.split(/;+/g);\n    for (let i = 0; i < styleList.length; i++) {\n      const style = styleList[i].trim();\n      if (style.length > 0) {\n        const colonIndex = style.indexOf(':');\n        if (colonIndex === -1) {\n          throw new Error(`Invalid CSS style: ${style}`);\n        }\n        const name = style.substr(0, colonIndex).trim();\n        styleMap[name] = style.substr(colonIndex + 1).trim();\n      }\n    }\n  }\n  return styleMap;\n}\n\n/**\n * Definition of a css style. Either a property name (e.g. \"flex-basis\") or an object\n * map of property name and value (e.g. {display: 'none', flex-order: 5})\n */\nexport type StyleDefinition = { [property: string]: string | number | null };\n"]}