kopia lustrzana https://github.com/backface/turtlestitch
333 wiersze
7.9 KiB
JavaScript
333 wiersze
7.9 KiB
JavaScript
/*
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extensions.js
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additional primitives for SNAP!
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written by Jens Mönig
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Copyright (C) 2021 by Jens Mönig
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This file is part of Snap!.
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Snap! is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// Global settings /////////////////////////////////////////////////////
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/*global modules, List, StageMorph, Costume, SpeechSynthesisUtterance,
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IDE_Morph, CamSnapshotDialogMorph*/
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modules.extensions = '2021-June-15';
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// Global stuff
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var SnapExtensions = new Map();
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/*
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SnapExtensions is a global dictionary of named functions which appear
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in the drop-down menus of the hidden extension "primitive" blocks sorted
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alphabetically.
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naming conventions
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------------------
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domain-prefix_function-name(parameter-list)
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example: 'lst_sort(list, fn)'
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- domain-prefix: 3-letter lowercase identifier followee by an underscore
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e.g.: err_, lst_, txt_, dta_, map_, tts_, xhr_, geo_, mda_
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- function-name: short, single word if possible, lowercase
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- parameter-list: comma separated names or type indicators
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function semantics
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------------------
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- functions are called by the "primitive" blocks with any arguments provided
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- "this" refers to the current snap object (sprite or stage) at call-time
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- a reference to the current process is always passed as last argument
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*/
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// errors & exceptions (err_):
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SnapExtensions.set(
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'err_error(msg)',
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function (msg) {
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throw new Error(msg);
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}
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);
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// list utils (lst_):
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SnapExtensions.set(
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'lst_sort(list, fn)',
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function (data, fn, proc) {
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return proc.reportAtomicSort(data, fn);
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}
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);
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SnapExtensions.set(
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'lst_linked(list)',
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function (data) {
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return data.isLinked;
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}
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);
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// text utils (txt_):
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SnapExtensions.set(
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'txt_lowercase(txt)',
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function (txt) {
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return txt.toLowerCase();
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}
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);
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// data sciene & frequency distribution analysis (dta_):
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SnapExtensions.set(
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'dta_analyze(list)',
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function (list) {
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var dict = new Map(),
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result = [],
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data = list.itemsArray(),
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len = data.length,
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i;
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for (i = 0; i < len; i += 1) {
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if (dict.has(data[i])) {
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dict.set(data[i], dict.get(data[i]) + 1);
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} else {
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dict.set(data[i], 1);
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}
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}
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dict.forEach(function (value, key) {
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result.push(new List([key, value]));
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});
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return new List(result);
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}
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);
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SnapExtensions.set(
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'dta_group(list, fn)',
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function (data, fn, proc) {
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return proc.reportAtomicGroup(data, fn);
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}
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);
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// World map (map_):
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SnapExtensions.set(
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'map_zoom',
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function () {
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return this.parentThatIsA(StageMorph).worldMap.zoom;
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}
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);
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SnapExtensions.set(
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'map_zoom(n)',
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function (num) {
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this.parentThatIsA(StageMorph).worldMap.setZoom(num);
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}
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);
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SnapExtensions.set(
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'map_lon(x)',
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function (x) {
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return this.parentThatIsA(StageMorph).worldMap.lonFromSnapX(x);
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}
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);
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SnapExtensions.set(
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'map_lat(y)',
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function (y) {
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return this.parentThatIsA(StageMorph).worldMap.latFromSnapY(y);
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}
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);
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SnapExtensions.set(
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'map_view(lon, lat)',
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function (lon, lat) {
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this.parentThatIsA(StageMorph).worldMap.setView(lon, lat);
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}
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);
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SnapExtensions.set(
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'map_y(lat)',
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function (lat) {
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return this.parentThatIsA(StageMorph).worldMap.snapYfromLat(lat);
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}
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);
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SnapExtensions.set(
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'map_x(lon)',
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function (lon) {
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return this.parentThatIsA(StageMorph).worldMap.snapXfromLon(lon);
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}
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);
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SnapExtensions.set(
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'map_pan(x, y)',
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function (x, y) {
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this.parentThatIsA(StageMorph).worldMap.panBy(x, y);
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}
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);
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SnapExtensions.set(
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'map_dist(lat1, lon1, lat2, lon2)',
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function (lat1, lon1, lat2, lon2) {
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return this.parentThatIsA(StageMorph).worldMap.distanceInKm(
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lat1,
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lon1,
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lat2,
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lon2
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);
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}
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);
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SnapExtensions.set(
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'map_update',
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function () {
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var stage = this.parentThatIsA(StageMorph);
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stage.worldMap.extent = stage.dimensions;
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stage.worldMap.render();
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}
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);
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SnapExtensions.set(
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'map_loaded',
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function () {
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return !this.parentThatIsA(StageMorph).worldMap.loading;
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}
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);
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SnapExtensions.set(
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'map_costume',
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function () {
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return new Costume(
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this.parentThatIsA(StageMorph).worldMap.canvas,
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'map'
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);
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}
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);
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SnapExtensions.set(
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'map_style(name)',
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function (name) {
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this.parentThatIsA(StageMorph).worldMap.setHost(name);
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}
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);
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// text-to-speech (tts_):
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SnapExtensions.set(
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'tts_speak(txt, lang, pitch, rate)',
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function (msg, accent, pitch, rate) {
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var utter = new SpeechSynthesisUtterance(msg),
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isDone = false;
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utter.lang = accent;
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utter.pitch = pitch;
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utter.rate = rate;
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utter.onend = () => isDone = true;
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window.speechSynthesis.speak(utter);
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return () => isDone;
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}
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);
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// XHR:
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SnapExtensions.set(
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'xhr_request(mth, url, dta, hdrs)',
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function (method, url, data, headers, proc) {
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var response, i, header;
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if (!proc.httpRequest) {
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proc.httpRequest = new XMLHttpRequest();
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proc.httpRequest.open(method, url, true);
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proc.assertType(headers, 'list');
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for (i = 1; i <= headers.length(); i += 1) {
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header = headers.at(i);
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proc.assertType(header, 'list');
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proc.httpRequest.setRequestHeader(
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header.at(1),
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header.at(2)
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);
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}
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proc.httpRequest.send(data || null);
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} else if (proc.httpRequest.readyState === 4) {
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response = proc.httpRequest.responseText;
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proc.httpRequest = null;
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return response;
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}
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proc.pushContext('doYield');
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proc.pushContext();
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}
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);
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// Geo-location (geo_)
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SnapExtensions.set(
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'geo_location(acc?)',
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function (includeAccuracy) {
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var crd = new List(),
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myself = this,
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options = {
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enableHighAccuracy: true,
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timeout: 5000,
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maximumAge: 0
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};
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function success(pos) {
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crd = new List([
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pos.coords.latitude,
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pos.coords.longitude
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]);
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if (includeAccuracy) {
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crd.add(pos.coords.accuracy);
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}
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}
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function error(err) {
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crd = new List([37.872099, -122.257852]);
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myself.inform('Warning:\nGeolocation failed.');
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}
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navigator.geolocation.getCurrentPosition(
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success,
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error,
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options
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);
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return () => crd;
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}
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);
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// MediaComp (mda_)
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SnapExtensions.set(
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'mda_snap',
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function () {
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var camDialog,
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result = false;
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camDialog = new CamSnapshotDialogMorph(
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this.parentThatIsA(IDE_Morph),
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this,
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() => result = null,
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function (costume) {
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result = costume;
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this.close();
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}
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);
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camDialog.key = 'camera';
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camDialog.popUp(this.world());
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return () => result;
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}
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);
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