496 lines
13 KiB
Forth
496 lines
13 KiB
Forth
\ Copyright 2022 Bradley D. Nelson
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\
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\ Licensed under the Apache License, Version 2.0 (the "License");
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\ you may not use this file except in compliance with the License.
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\ You may obtain a copy of the License at
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\
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\ http://www.apache.org/licenses/LICENSE-2.0
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\
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\ Unless required by applicable law or agreed to in writing, software
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\ distributed under the License is distributed on an "AS IS" BASIS,
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\ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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\ See the License for the specific language governing permissions and
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\ limitations under the License.
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vocabulary web web definitions
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: jseval! ( a n index -- ) 0 call ;
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r|
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(function(sp) {
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var n = i32[sp>>2]; sp -= 4;
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var a = i32[sp>>2]; sp -= 4;
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var text = GetString(a, n);
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eval(text);
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return sp;
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})
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| 1 jseval!
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: jseval ( a n -- ) 1 call ;
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r~
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context.inbuffer = [];
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context.outbuffer = [];
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if (!globalObj.write) {
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function AddMeta(name, content) {
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var meta = document.createElement('meta');
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meta.name = name;
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meta.content = content;
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document.head.appendChild(meta);
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}
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AddMeta('apple-mobile-web-app-capable', 'yes');
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AddMeta('apple-mobile-web-app-status-bar-style', 'black-translucent');
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AddMeta('viewport', 'width=device-width, initial-scale=1.0, ' +
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'maximum-scale=1.0, user-scalable=no, minimal-ui');
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context.screen = document.getElementById('ueforth');
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if (context.screen === null) {
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context.screen = document.createElement('div');
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context.screen.style.width = '100%';
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document.body.appendChild(context.screen);
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}
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context.filler = document.createElement('div');
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document.body.insertBefore(context.filler, document.body.firstChild);
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context.canvas = document.createElement('canvas');
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context.canvas.width = 1000;
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context.canvas.height = 1000;
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context.canvas.style.width = '1px';
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context.canvas.style.height = '1px';
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context.canvas.style.top = 0;
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context.canvas.style.left = 0;
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context.canvas.style.position = 'fixed';
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context.canvas.style.backgroundColor = '#000';
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context.screen.appendChild(context.canvas);
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context.ctx = context.canvas.getContext('2d');
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context.AddLine = function() {
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if (context.outbuffer.length > 0) {
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context.Update(true);
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context.outbuffer = [];
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}
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var line = document.createElement('pre');
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line.style.width = '100%';
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line.style.whiteSpace = 'pre-wrap';
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line.style.margin = '0px';
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context.terminal.appendChild(line);
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context.lines.push(line);
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context.last_line = line;
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};
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context.ResetTerminal = function() {
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if (context.terminal) {
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context.screen.removeChild(context.terminal);
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}
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context.terminal = document.createElement('div');
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context.terminal.style.width = '100%';
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context.terminal.style.whiteSpace = 'pre-wrap';
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context.screen.appendChild(context.terminal);
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context.lines = [];
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context.last_line = null;
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context.outbuffer = [];
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context.AddLine();
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};
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context.ResetTerminal();
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context.keyboard = document.createElement('div');
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context.KEY_HEIGHT = 45;
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context.KEYBOARD_HEIGHT = context.KEY_HEIGHT * 4;
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const TAB = ['⭾', 9, 45];
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const PIPE = [String.fromCharCode(124), 124, 45];
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const BACKSLASH = ['\\', 92, 45];
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const ENTER = ['⏎', 13, 45];
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const SHIFT = ['⇧', 1, 45, 0];
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const SHIFT2 = ['⬆', 0, 45, 0];
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const SHIFT3 = ['=\\<', 3, 45, 0];
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const NUMS = ['?123', 2, 45, 0];
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const ABC = ['ABC', 0, 45, 0];
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const BACKSPACE = ['⌫', 8, 45];
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const BACKTICK = String.fromCharCode(96);
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const TILDE = String.fromCharCode(126);
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const PASTE = ['^V', 22, 30];
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const G1 = ['Gap', 0, 15];
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const KEY_COLOR = 'linear-gradient(to bottom right, #ccc, #999)';
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var keymaps = [
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AddKeymap([
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'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', 'Newline',
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G1, 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', G1, 'Newline',
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SHIFT, 'z', 'x', 'c', 'v', 'b', 'n', 'm', BACKSPACE, 'Newline',
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NUMS, '/', [' ', 32, 5 * 30], '.', ENTER,
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]),
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AddKeymap([
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'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', 'Newline',
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G1, 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', G1, 'Newline',
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SHIFT2, 'Z', 'X', 'C', 'V', 'B', 'N', 'M', BACKSPACE, 'Newline',
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NUMS, '/', [' ', 32, 5 * 30], '.', ENTER,
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]),
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AddKeymap([
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'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', 'Newline',
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PASTE, '@', '$', '_', '&', '-', '+', '(', ')', '/', 'Newline',
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SHIFT3, '*', '"', '\'', ':', ';', '!', '?', BACKSPACE, 'Newline',
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ABC, ',', [' ', 32, 5 * 30], '.', ENTER,
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]),
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AddKeymap([
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TILDE, BACKTICK, '3', '4', '5', '^', '7', '8', '9', '0', 'Newline',
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'#', '@', '$', '_', '&', '-', '=', '{', '}', '\\', 'Newline',
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NUMS, '%', '"', '\'', ':', ';', '[', ']', BACKSPACE, 'Newline',
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ABC, '<', [' ', 32, 5 * 30], '>', ENTER,
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]),
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];
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function SwitchKeymap(n) {
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for (var i = 0; i < keymaps.length; ++i) {
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keymaps[i].style.display = i == n ? '' : 'none';
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}
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}
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context.Inject = function(text) {
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var data = new TextEncoder().encode(text);
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for (var i = 0; i < data.length; ++i) {
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context.inbuffer.push(data[i]);
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}
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};
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context.Paste = function() {
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navigator.clipboard.readText().then(function(clipText) {
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context.Inject(clipText);
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});
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};
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function AddKey(keymap, item) {
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if (item === 'Newline') {
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var k = document.createElement('br');
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keymap.appendChild(k);
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return;
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}
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var k = document.createElement('button');
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k.style.verticalAlign = 'middle';
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k.style.border = 'none';
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k.style.margin = '0';
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k.style.padding = '0';
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k.style.backgroundImage = KEY_COLOR;
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k.style.width = (100 / 10) + '%';
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k.style.height = context.KEY_HEIGHT + 'px';
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if (item.length > 2) {
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k.style.width = (100 / 10 * item[2] / 30) + '%';
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}
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if (item[0] === 'Gap') {
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k.style.backgroundColor = '#444';
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k.style.backgroundImage = '';
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keymap.appendChild(k);
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return;
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}
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if (item.length > 1) {
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var keycode = item[1];
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} else {
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var keycode = item[0].charCodeAt(0);
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}
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k.innerHTML = item instanceof Array ? item[0] : item;
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k.onclick = function() {
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if (item.length > 3) { // SHIFT
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SwitchKeymap(item[1]);
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} else if (keycode === 22) { // PASTE
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context.Paste();
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} else {
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context.inbuffer.push(keycode);
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}
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};
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keymap.appendChild(k);
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}
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function AddKeymap(keymap) {
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var div = document.createElement('div');
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for (var i = 0; i < keymap.length; ++i) {
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var item = keymap[i];
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AddKey(div, item);
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}
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context.keyboard.appendChild(div);
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return div;
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}
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SwitchKeymap(0);
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context.keyboard.style.position = 'fixed';
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context.keyboard.style.width = '100%';
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context.keyboard.style.bottom = '0px';
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if (/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)) {
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context.mobile = -1;
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context.tailer = document.createElement('div');
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context.tailer.style.width = '1px';
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context.tailer.style.height = context.KEYBOARD_HEIGHT + 'px';
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context.screen.appendChild(context.tailer);
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document.body.appendChild(context.keyboard);
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} else {
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context.mobile = 0;
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}
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context.text_fraction = context.mobile ? 3000 : 1667;
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context.min_text_portion = 120 + (context.mobile ? context.KEYBOARD_HEIGHT : 0);
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context.mode = 1;
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function setMode(mode) {
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if (context.mode === mode) {
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return ;
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}
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if (mode) {
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context.filler.style.display = '';
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context.canvas.style.display = '';
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} else {
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context.filler.style.display = 'none';
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context.canvas.style.display = 'none';
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}
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context.mode = mode;
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}
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context.setMode = setMode;
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function Resize() {
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var width = window.innerWidth;
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var theight = Math.max(context.min_text_portion,
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Math.floor(window.innerHeight *
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context.min_text_portion / 10000));
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var height = window.innerHeight - theight;
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if (width === context.width && height === context.height) {
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return;
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}
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context.canvas.style.width = width + 'px';
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context.canvas.style.height = height + 'px';
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if (context.text_fraction == 0 &&
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context.min_text_portion == 0) {
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context.filler.style.width = '1px';
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context.filler.style.height = '0px';
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} else {
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context.filler.style.width = '1px';
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context.filler.style.height = height + 'px';
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}
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context.width = width;
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context.height = height;
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}
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context.Resize = Resize;
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function Clear() {
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Resize();
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context.ctx.fillStyle = '#000';
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context.ctx.fillRect(0, 0, context.canvas.width, context.canvas.height);
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}
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context.Clear = Clear;
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window.onresize = function(e) {
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Resize();
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};
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function KeyPress(e) {
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context.inbuffer.push(e.keyCode);
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e.preventDefault();
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return false;
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}
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window.onkeypress = KeyPress;
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function KeyDown(e) {
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if (e.keyCode == 8) {
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context.inbuffer.push(e.keyCode);
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e.preventDefault();
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return false;
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}
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}
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window.onkeydown = KeyDown;
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context.Update = function(newline) {
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var cursor = String.fromCharCode(0x2592);
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context.last_line.innerText = new TextDecoder('utf-8').decode(
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new Uint8Array(context.outbuffer)) + (newline ? '' : cursor);
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};
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window.addEventListener('paste', function(e) {
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context.Inject(e.clipboardData.getData('text'));
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});
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setMode(0);
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context.Clear();
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}
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~ jseval
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(function(sp) {
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var n = i32[sp>>2]; sp -= 4;
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var a = i32[sp>>2]; sp -= 4;
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if (globalObj.write) {
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var text = GetString(a, n);
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write(text);
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sp += 4; i32[sp>>2] = 0;
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} else {
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var newline = false;
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for (var i = 0; i < n; ++i) {
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var ch = u8[a + i];
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if (ch == 12) {
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context.ResetTerminal();
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context.outbuffer = [];
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} else if (ch == 8) {
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context.outbuffer = context.outbuffer.slice(0, -1);
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} else if (ch == 10) {
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context.AddLine();
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newline = true;
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} else if (ch == 13) {
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} else {
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context.outbuffer.push(ch);
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}
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}
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context.Update();
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if (newline) {
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window.scrollTo(0, document.body.scrollHeight);
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}
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sp += 4; i32[sp>>2] = newline ? -1 : 0;
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}
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return sp;
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})
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| 2 jseval!
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: web-type ( a n -- ) 2 call if yield then ;
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' web-type is type
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(function(sp) {
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if (globalObj.readline && !context.inbuffer.length) {
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var line = unescape(encodeURIComponent(readline()));
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for (var i = 0; i < line.length; ++i) {
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context.inbuffer.push(line.charCodeAt(i));
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}
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context.inbuffer.push(13);
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}
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if (context.inbuffer.length) {
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sp += 4; i32[sp>>2] = context.inbuffer.shift();
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} else {
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sp += 4; i32[sp>>2] = 0;
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}
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return sp;
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})
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| 3 jseval!
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: web-key ( -- n ) begin yield 3 call dup if exit then drop again ;
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' web-key is key
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(function(sp) {
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if (globalObj.readline) {
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sp += 4; i32[sp>>2] = -1;
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return sp;
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}
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sp += 4; i32[sp>>2] = context.inbuffer.length ? -1 : 0;
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return sp;
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})
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| 4 jseval!
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: web-key? ( -- f ) yield 4 call ;
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' web-key? is key?
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(function(sp) {
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var val = i32[sp>>2]; sp -= 4;
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if (globalObj.quit) {
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quit(val);
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} else {
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Init();
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}
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return sp;
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})
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| 5 jseval!
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: terminate ( n -- ) 5 call ;
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(function(sp) {
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if (globalObj.write) {
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sp += 4; i32[sp>>2] = 0; // Disable echo.
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} else {
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sp += 4; i32[sp>>2] = -1; // Enable echo.
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}
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return sp;
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})
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| 6 jseval! 6 call echo !
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(function(sp) {
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var mode = i32[sp>>2]; sp -= 4;
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if (globalObj.write) {
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return sp;
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}
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context.setMode(mode);
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return sp;
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})
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| 7 jseval!
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r|
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(function(sp) {
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var c = i32[sp>>2]; sp -= 4;
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var h = i32[sp>>2]; sp -= 4;
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var w = i32[sp>>2]; sp -= 4;
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var y = i32[sp>>2]; sp -= 4;
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var x = i32[sp>>2]; sp -= 4;
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if (globalObj.write) {
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return sp;
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}
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function HexDig(n) {
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return ('0' + n.toString(16)).slice(-2);
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}
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context.ctx.fillStyle = '#' + HexDig((c >> 16) & 0xff) +
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HexDig((c >> 8) & 0xff) +
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HexDig(c & 0xff);
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context.ctx.fillRect(x, y, w, h);
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return sp;
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})
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| 8 jseval!
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r|
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(function(sp) {
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var h = i32[sp>>2]; sp -= 4;
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var w = i32[sp>>2]; sp -= 4;
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if (globalObj.write) {
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return sp;
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}
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context.canvas.width = w;
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context.canvas.height = h;
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return sp;
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})
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| 9 jseval!
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r|
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(function(sp) {
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if (globalObj.write) {
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sp += 4; i32[sp>>2] = 1;
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sp += 4; i32[sp>>2] = 1;
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return sp;
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}
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sp += 4; i32[sp>>2] = context.width;
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sp += 4; i32[sp>>2] = context.height;
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return sp;
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})
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| 10 jseval!
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r|
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(function(sp) {
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var mp = i32[sp>>2]; sp -= 4;
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var tf = i32[sp>>2]; sp -= 4;
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if (globalObj.write) {
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return sp;
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}
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context.text_fraction = tf;
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context.min_text_portion = mp;
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context.Resize();
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return sp;
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})
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| 11 jseval!
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r|
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(function(sp) {
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sp += 4; i32[sp>>2] = context.mobile;
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return sp;
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})
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| 12 jseval!
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r|
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(function(sp) {
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sp += 4; i32[sp>>2] = context.KEYBOARD_HEIGHT;
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return sp;
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})
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| 13 jseval!
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forth definitions web
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: bye 0 terminate ;
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: page 12 emit ;
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: gr 1 7 call ;
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: text 0 7 call ;
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: mobile ( -- f ) 12 call ;
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: keys-height ( -- n ) 13 call ;
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$ffffff value color
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: box ( x y w h -- ) color 8 call ;
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: window ( w h -- ) 9 call ;
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: viewport@ ( -- w h ) 10 call ;
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: show-text ( f -- )
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if
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mobile if 3000 120 keys-height + else 1667 120 then
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else
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mobile if 0 keys-height else 0 0 then
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then 11 call ;
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forth definitions
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