98 lines
2.2 KiB
JavaScript
98 lines
2.2 KiB
JavaScript
function UI(buttons, screen) {
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return {
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animation: animation,
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cinematic: cinematic,
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frame: frame,
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menu: menu,
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text: text
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};
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function animation(frames) {
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var frameCounter = 0;
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var scheduled;
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var step = function() {
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if(frameCounter < frames.length) {
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scheduled = null;
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frames[frameCounter].action();
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if(frames[frameCounter].delay != undefined) {
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scheduled = setTimeout(step, frames[frameCounter].delay);
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}
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frameCounter++
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}
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};
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return {
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run: step,
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pause: function() { if(scheduled != undefined) { clearTimeout(scheduled); } }
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};
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}
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function cinematic(frames, controls) {
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var remote = animation(frames);
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var mapping = {};
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for(var key in controls) {
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mapping[key] = function() {
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buttons.pop();
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remote.pause();
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controls[key]();
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};
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}
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return function(f) {
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buttons.push(mapping);
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remote.run();
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f();
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};
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}
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function frame(id) {
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screen.clear();
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screen.frame(id);
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}
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function menu(config) {
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var cursor = 0;
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var m = screen.menu(config.entries);
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var sync = function() { screen.select(cursor); };
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var mapping = {
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'Up': function() { cursor = Math.max(0, cursor - 1); sync(); },
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'Down': function() { cursor = Math.min(config.entries.length - 1, cursor + 1); sync(); },
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'A': function() { config.entries[cursor].action(); }
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};
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if(config.cancel != undefined) {
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mapping['B'] = function() { buttons.pop(); screen.clear(m); config.cancel(); }
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}
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buttons.push(mapping);
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}
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function textScreen(message) {
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var characters = message.split('');
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var frames = [];
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var ready = false;
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var append = function(c) { return function() { screen.appendText(c); }; };
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for(var i = 0; i < characters.length; i++) {
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frames.push({action: append(characters[i]), delay: 50});
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}
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frames.push({action: function() { ready = true; screen.markAsRead(); }, delay: null});
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var remote = animation(frames);
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return function(f) {
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buttons.push({
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'A': function() {
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if(ready) {
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f();
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} else {
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remote.pause();
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screen.text(message);
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ready = true;
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}
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}
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});
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screen.text('');
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remote.run();
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};
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}
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function text(message) {
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return textScreen(message);
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}
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}
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