378 lines
12 KiB
XML
378 lines
12 KiB
XML
<?xml version="1.0"?>
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<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
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"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
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<svg version="1.1"
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xmlns="http://www.w3.org/2000/svg"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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width="300"
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height="500"
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viewBox="0 0 300 500"
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onload="start_chat('Ven')"
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overflow="auto"
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>
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<defs>
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<symbol id="kaereste_foto" width="60" height="200">
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<g style="fill: pink; stroke: pink;">
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<circle cx="20" cy="20" r="20" />
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<line x1="20" y1="40" x2="20" y2="60" />
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<ellipse cx="20" cy="110" rx="10" ry="50" />
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<!-- left arm -->
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<polyline fill="none"
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points="15,70 5,50 0,40" />
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<!-- right arm -->
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<polyline fill="none"
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points="25,70 35,50 40,40" />
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<!-- left leg -->
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<polyline fill="none"
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points="15,155 5,135 0,125" />
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<!-- right leg -->
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<polyline fill="none"
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points="25,155 35,135 40,125" />
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<!-- the thing -->
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<text x="14" y="160" style="font: bold 20px sans-serif" fill="black">?</text>
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</g>
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</symbol>
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</defs>
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<script type="application/ecmascript">
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<![CDATA[
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'use strict';
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const svgns = "http://www.w3.org/2000/svg";
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// must be the same as the SVG dimensions
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const width = 300;
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const height = 500;
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const line_height = 14;
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const bubble_padding = 6;
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const bubble_spacing = 5;
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const visible_chat_area = {'top': 60, 'bottom': 500};
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const typing_speed = 7;
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var conversation_count = 0;
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/// SVG 1.1 doesn't do proper text splitting into several lines.
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/// we need to do it ourselves.
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function split_text_into_lines(text, upper_line_length) {
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let result = [];
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while(text.length) {
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if(text.length < upper_line_length) {
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result.push(text);
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break; // we are done
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}
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let found_split_point = false;
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for(let i = upper_line_length; i; i--) {
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if(text[i] == ' ') {
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result.push(text.slice(0, i));
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text = text.slice(i+1);
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found_split_point = true;
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break;
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}
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}
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if(!found_split_point) {
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// no <space> found. Split at character boundary instead
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result.push(text.slice(0, upper_line_length));
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text = text.slice(upper_line_length);
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}
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}
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return result;
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}
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/// A class holding a text chat message.
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///
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/// *ChatMessages are owned by a Dialog.
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function TextChatMessage(message_text, is_myself) {
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let lines = split_text_into_lines(message_text, 28);
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let bubble_color = (is_myself)? 'white': '#DDFF66';
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let container = document.getElementById('messages');
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// attributes
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this.height = 0; // height on screen when fully visible
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this.group = null; // a <g> with a transform=translate(0,y_shift) attribute
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/// Render the chat message on the screen
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this.draw = function(y_offset, y_shift) {
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let group = create_svg_node('g', {'transform': `translate(0, ${y_shift})`});
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let x = (is_myself ? 190 : 110);
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let text = create_svg_node('text', {
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'x': `${x}%`,
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'font-size': `${line_height}px`,
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'text-anchor': is_myself ? 'end' : 'start'
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});
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let height_so_far = y_offset;
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lines.forEach(function(line) {
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let y = height_so_far;
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let tspan = create_svg_node('tspan', {
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'x': `${x}%`,
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'y': `${y + line_height}`, // important: y is lower text baseline
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'fill': 'green',
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'width': '5%'
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});
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tspan.appendChild(document.createTextNode(line));
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text.appendChild(tspan);
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height_so_far += line_height;
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});
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group.appendChild(text); // needs to be part of the DOM *now*
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container.appendChild(group);
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let bubble = create_bubble(text, bubble_color);
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group.appendChild(bubble);
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redraw_on_top(text);
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this.height = bubble.getBBox().height + bubble_spacing;
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this.group = group;
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}
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/// Move a chat message on the screen (to simulate scrolling)
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this.shift_y_pos = function(by) {
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redraw_on_top(document.getElementById('contact_name_box'));
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this.group.setAttribute('transform', `translate(0, ${by})`);
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}
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}
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/// A class holding a image-based chat message.
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///
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/// *ChatMessages are owned by a Dialog.
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function ImageChatMessage(symbol_id, is_myself) {
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let container = document.getElementById('messages');
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let bubble_color = (is_myself)? 'white': '#DDFF66';
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// attributes
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this.height = 0; // height on screen when fully visible
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this.group = null; // a <g> with a transform=translate(0,y_shift) attribute
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this.draw = function(y_offset, y_shift) {
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let group = create_svg_node('g', {'transform': `translate(0, ${y_shift})`});
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let x = (is_myself ? 190 : 110);
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let img = create_svg_node('use', {
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'href': symbol_id,
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x: `${x}%`,
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y: y_offset,
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});
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group.appendChild(img); // needs to be part of the DOM *now*
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container.appendChild(group);
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let bubble = create_bubble(img, bubble_color);
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group.appendChild(bubble);
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redraw_on_top(img);
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this.height = bubble.getBBox().height + bubble_spacing;
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this.group = group;
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}
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this.shift_y_pos = function(by) {
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redraw_on_top(document.getElementById('contact_name_box'));
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this.group.setAttribute('transform', `translate(0, ${by})`);
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}
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}
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function create_chat_message(content, is_myself) {
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let constr = (content.startsWith('#'))? ImageChatMessage: TextChatMessage;
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return new constr(content, is_myself);
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}
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/// Promise-based version of setTimeout
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const wait = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
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/// toggle viewport between message list and contact list
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/// That means: show either the left or right side of the SVG
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function swipe_viewport() {
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let svg = document.getElementsByTagName('svg')[0];
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let coords = svg.getAttribute('viewBox').split(' ');
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let x = parseInt(coords.shift());
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if(x == 0) {
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// moving from messages to contacts
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var step = 5;
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var end = width;
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} else {
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// moving from contacts to messages
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var step = -5;
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var end = 0;
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}
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let viewBox_suffix = coords.join(' '); // only 3 elements
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async function animate(resolve, reject) {
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while(x!=end) {
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await wait(1);
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x += step;
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svg.setAttribute('viewBox', `${x} ${viewBox_suffix}`);
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}
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resolve();
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};
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new Promise(animate);
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}
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// Create a chat bubble around an element.
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//
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// The element must already be inside the DOM for this to work.
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function create_bubble(inner_element, color) {
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const bbox = inner_element.getBBox();
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const y_percent = Math.round(((bbox.y - bubble_padding) / height) * 100);
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let bubble = create_svg_node('rect', {
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'x': bbox.x - bubble_padding,
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'y': `${y_percent}%`,
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'width': bbox.width + 2 * bubble_padding,
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'height': bbox.height + 2 * bubble_padding,
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'rx': 8,
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'fill': color,
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});
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return bubble;
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}
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function create_svg_node(tag_name, attrs) {
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let node = document.createElementNS(svgns, tag_name);
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for(let attr in attrs) {
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node.setAttribute(attr, attrs[attr]);
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}
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return node;
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}
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/// Ensure that an element is redrawn above all other elements
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///
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/// The element's children will also be redrawn on top
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function redraw_on_top(element) {
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let parent = element.parentNode;
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parent.appendChild(parent.removeChild(element));
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}
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function removeAllChildren(parentNode) {
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while(parentNode.firstChild) {
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parentNode.removeChild(parentNode.lastChild);
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}
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}
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function start_chat(who) {
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let indicator = document.getElementById('contact_indicator');
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indicator.childNodes[0].data = `Kontakt: ${who}`;
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removeAllChildren(document.getElementById('messages'));
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swipe_viewport();
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switch(who) {
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case 'Ven':
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dialog_ven();
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break;
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case 'Mor':
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dialog_mor();
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break;
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case 'Kæreste':
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dialog_kaereste();
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break;
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default:
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alert(`Unknown contact: ${who}`);
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}
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}
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function Dialog(chat_partner) {
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let conversation_id = ++conversation_count;
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this.messages = [];
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this.y_shift = visible_chat_area.top; // for scrolling
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this.all_elements_height = 0; // also for scrolling
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async function post_message(dialog, message, is_myself) {
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if(dialog.messages.length) await wait(message.length * typing_speed); // first message should be instant
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if(conversation_id != conversation_count) {
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return; // Do not add messages to old conversation
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}
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let chat_message = create_chat_message(message, is_myself);
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chat_message.draw(dialog.all_elements_height, // offset
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dialog.y_shift);
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dialog.all_elements_height += chat_message.height;
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dialog.messages.push(chat_message);
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let bottom = dialog.all_elements_height + dialog.y_shift;
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let scroll = Math.max(0, bottom - visible_chat_area.bottom);
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while(scroll > line_height) {
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dialog.y_shift -= line_height;
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scroll -= line_height;
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dialog.messages.forEach(msg => msg.shift_y_pos(dialog.y_shift));
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await wait(50);
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}
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}
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this.me = async function(message) {
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await post_message(this, message, true);
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}
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this.you = async function(message) {
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await post_message(this, message, false);
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}
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}
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async function dialog_ven() {
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let d = new Dialog('Ven');
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await d.me("hej");
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await d.you("tak for sidst!");
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await d.you('Har du hørt om den nye EU lov "ChatControl"?');
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await d.me("nej, det har jeg ikke");
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await d.me("hvad handler det om?");
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await d.you('EU kommissionen planlægger at læse alle chatbeskeder i EU');
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await d.me('Ja, men vi krypterer jo vores beskeder? Tough luck!');
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await d.you('Det tager de højde for. Aflytningen vil ske før krypteringen på din telefon!');
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await d.me('Det lyder overhovedet ikke rart. Hvorfor vil de gøre det?');
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await d.you('De siger at det er for at beskytte børn på nettet.');
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await d.you('Men det giver ikke meget mening');
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await d.me('Alle vores beskeder skal scannes på grund af børn på nettet? Det lyder dumt!');
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await d.you('Her kan du læse mere om det:');
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await d.you('https://chatcontrol.eu');
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}
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async function dialog_mor() {
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let d = new Dialog('Mor');
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await d.you("Jeg har fundet nogle gamle familiebilleder fra vores ferie 10 år siden");
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await d.you("Her leger du på stranden");
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await d.you("(naked stick figure image here)");
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}
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async function dialog_kaereste() {
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let d = new Dialog('Kæreste');
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await d.me('hej smukkeste');
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await d.you('hej, jeg har lige tænkt på dig!');
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await d.you('og derfor har jeg taget et sexet billede');
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await d.you('#kaereste_foto');
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await d.me('tak. Det har jeg savnet!');
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await d.me('du ser stadig så ung ud.');
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await d.me('Jeg tror at vi skal være forsigtige, fordi der er en overvågning af vores beskeder');
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await d.you('What the fuck??? Hvem overvågner os?????');
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await d.me('Ingen lige nu. Men EU\'en vil forpligte tilbyderne af messagingtjenester til at scanne alle beskeder');
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await d.me('Og hvis der er beskeder som "ligner" børneborno får politiet en kopi af dem');
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await d.you('Jeg vil hellere ikke at politiet får mine nøgenbilleder. Det er min krop og jeg vil selv bestemme over det!');
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}
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]]>
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</script>
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<!-- [right] contact name view -->
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<g id="contact_name_box">
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<rect x="300" y="0" width="300" height="50" fill="yellow" />
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<polyline points="300,20 320,0 320,40" fill="blue" onclick="swipe_viewport()" /> <!-- XXX: these polyline points depend on the svg width -->
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<text x="375" y="30" id="contact_indicator">loading...</text>
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</g>
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<!-- [right] messages view -->
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<rect x="300" y="50" width="300" height="450" fill="aqua" />
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<g id="messages"></g>
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<!-- [left] contact list -->
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<rect x="0" y="0" width="300" height="50" fill="yellow" />
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<text x="60" y="30">Dine kontakter</text>
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<rect x="0" y="50" width="300" height="450" style="stroke: green; stroke-width: 10px" fill="aqua" />
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<text x="15" y="75" onclick="start_chat('Ven')">Ven</text>
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<text x="15" y="100" onclick="start_chat('Mor')">Mor</text>
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<text x="15" y="125" onclick="start_chat('Kæreste')">Kæreste❤</text>
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</svg>
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