/** * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors * SPDX-FileCopyrightText: 2013-2016 ownCloud, Inc. * SPDX-License-Identifier: AGPL-3.0-or-later */ /* eslint-disable */ import $ from 'jquery' import md5 from 'blueimp-md5' /* * Adds a background color to the element called on and adds the first character * of the passed in string. This string is also the seed for the generation of * the background color. * * You have following HTML: * *
* * And call this from Javascript: * * $('#albumart').imageplaceholder('The Album Title'); * * Which will result in: * *
T
* * You may also call it like this, to have a different background, than the seed: * * $('#albumart').imageplaceholder('The Album Title', 'Album Title'); * * Resulting in: * *
A
* */ /* * Alternatively, you can use the prototype function to convert your string to rgb colors: * * "a6741a86aded5611a8e46ce16f2ad646".toRgb() * * Will return the rgb parameters within the following object: * * Color {r: 208, g: 158, b: 109} * */ const toRgb = (s) => { // Normalize hash var hash = s.toLowerCase() // Already a md5 hash? if (hash.match(/^([0-9a-f]{4}-?){8}$/) === null) { hash = md5(hash) } hash = hash.replace(/[^0-9a-f]/g, '') function Color(r, g, b) { this.r = r this.g = g this.b = b } function stepCalc(steps, ends) { var step = new Array(3) step[0] = (ends[1].r - ends[0].r) / steps step[1] = (ends[1].g - ends[0].g) / steps step[2] = (ends[1].b - ends[0].b) / steps return step } function mixPalette(steps, color1, color2) { var palette = [] palette.push(color1) var step = stepCalc(steps, [color1, color2]) for (var i = 1; i < steps; i++) { var r = parseInt(color1.r + (step[0] * i)) var g = parseInt(color1.g + (step[1] * i)) var b = parseInt(color1.b + (step[2] * i)) palette.push(new Color(r, g, b)) } return palette } const red = new Color(182, 70, 157); const yellow = new Color(221, 203, 85); const blue = new Color(0, 130, 201); // Nextcloud blue // Number of steps to go from a color to another // 3 colors * 6 will result in 18 generated colors const steps = 6; const palette1 = mixPalette(steps, red, yellow); const palette2 = mixPalette(steps, yellow, blue); const palette3 = mixPalette(steps, blue, red); const finalPalette = palette1.concat(palette2).concat(palette3); // Convert a string to an integer evenly function hashToInt(hash, maximum) { var finalInt = 0 var result = [] // Splitting evenly the string for (var i = 0; i < hash.length; i++) { // chars in md5 goes up to f, hex:16 result.push(parseInt(hash.charAt(i), 16) % 16) } // Adds up all results for (var j in result) { finalInt += result[j] } // chars in md5 goes up to f, hex:16 // make sure we're always using int in our operation return parseInt(parseInt(finalInt) % maximum) } return finalPalette[hashToInt(hash, steps * 3)] } String.prototype.toRgb = function() { OC.debug && console.warn('String.prototype.toRgb is deprecated! It will be removed in Nextcloud 22.') return toRgb(this) } $.fn.imageplaceholder = function(seed, text, size) { text = text || seed // Compute the hash var rgb = toRgb(seed) this.css('background-color', 'rgb(' + rgb.r + ', ' + rgb.g + ', ' + rgb.b + ')') // Placeholders are square var height = this.height() || size || 32 this.height(height) this.width(height) // CSS rules this.css('color', '#fff') this.css('font-weight', 'normal') this.css('text-align', 'center') // calculate the height this.css('line-height', height + 'px') this.css('font-size', (height * 0.55) + 'px') if (seed !== null && seed.length) { var placeholderText = text.replace(/\s+/g, ' ').trim().split(' ', 2).map((word) => word[0].toUpperCase()).join('') this.html(placeholderText); } } $.fn.clearimageplaceholder = function() { this.css('background-color', '') this.css('color', '') this.css('font-weight', '') this.css('text-align', '') this.css('line-height', '') this.css('font-size', '') this.html('') this.removeClass('icon-loading') this.removeClass('icon-loading-small') } 7'>commitdiffstats
path: root/docs/teaching/exercises/answers/Answer2c.java
blob: 2364aaeb0ebcb4ddb9d275576e092812ae61dfeb (plain) 
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/* *******************************************************************
 * Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *
 * Contributors:
 *     PARC     initial implementation
 * ******************************************************************/

package answers;

import figures.Group;
import figures.FigureElement;

public aspect Answer2c {
    before(FigureElement newValue, Group g):
            call(void Group.add(FigureElement))
            && args(newValue)
            && target(g) {
        if (newValue == null) {
            throw new IllegalArgumentException("null not allowed");
        }
        if (newValue == g) {
            throw new IllegalArgumentException("self not allowed");
        }

    }
}