mirror of
https://github.com/embarklabs/neo-blessed.git
synced 2025-01-25 18:29:26 +00:00
819 lines
18 KiB
JavaScript
819 lines
18 KiB
JavaScript
/**
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* Blessed high-level interface
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* Still in development
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*/
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/*
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API Example:
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This will render a box with ascii borders containing the
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text 'Hello world!', centered horizontally and vertically.
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var blessed = require('blessed')
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, program = blessed()
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, screen;
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screen = new blessed.Screen({
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program: program
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});
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screen.append(new blessed.Text({
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screen: screen,
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parent: screen,
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fg: 3,
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bg: 5,
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border: {
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type: 'ascii',
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fg: 1
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},
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content: 'Hello world!',
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top: 'center',
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left: 'center'
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}));
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program.on('keypress', function(ch, key) {
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if (key.name === 'escape') {
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process.exit(0);
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}
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});
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screen.render();
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*/
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/**
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* Node
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*/
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function Node(options) {
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this.children = options.children || [];
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}
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Node.prototype.prepend = function(element) {
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this.children.unshift(element);
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};
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Node.prototype.append = function(element) {
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this.children.push(element);
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};
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Node.prototype.remove = function(element) {
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var i = this.children.indexOf(element);
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if (~i) this.children.splice(i, 1);
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};
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Node.prototype.detach = function(element) {
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this.parent.remove(element);
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};
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/**
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* Screen
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*/
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function Screen(options) {
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var self = this;
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Node.call(this, options);
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this.children = options.children || [];
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this.program = options.program;
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this.tput = this.program.tput;
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this.dattr = ((0 << 18) | (0x1ff << 9)) | 0x1ff;
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this.position = {
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left: this.left = 0,
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right: this.right = 0,
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top: this.top = 0,
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bottom: this.bottom = 0
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};
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this.alloc();
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this.program.on('resize', function() {
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self.alloc();
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self.render();
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});
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}
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Screen.prototype.__proto__ = Node.prototype;
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Screen.prototype.__defineGetter__('cols', function() {
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return this.program.cols;
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});
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Screen.prototype.__defineGetter__('rows', function() {
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return this.program.rows;
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});
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Screen.prototype.__defineGetter__('width', function() {
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return this.program.cols;
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});
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Screen.prototype.__defineGetter__('height', function() {
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return this.program.rows;
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});
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Screen.prototype.alloc = function() {
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var x, y;
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this.lines = [];
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for (y = 0; y < this.rows; y++) {
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this.lines[y] = [];
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for (x = 0; x < this.cols; x++) {
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this.lines[y][x] = [this.dattr, ' '];
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}
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this.lines[y].dirty = true;
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}
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};
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Screen.prototype.render = function() {
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this.children.forEach(function(el) {
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el.render();
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});
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this.draw(0, this.rows - 1);
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};
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Screen.prototype.draw = function(start, end) {
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var x
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, y
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, line
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, out
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, ch
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, data
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, attr
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, fgColor
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, bgColor
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, flags;
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this.program.saveCursor();
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for (y = start; y <= end; y++) {
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line = this.lines[y];
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if (!line.dirty) continue;
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line.dirty = false;
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out = '';
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attr = this.dattr;
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for (x = 0; x < this.cols; x++) {
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data = line[x][0];
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ch = line[x][1];
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if (data && data !== attr) {
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if (attr !== this.dattr) {
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out += '\x1b[m';
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}
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if (data !== this.dattr) {
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out += '\x1b[';
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bgColor = data & 0x1ff;
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fgColor = (data >> 9) & 0x1ff;
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flags = data >> 18;
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// bold
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if (flags & 1) {
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out += '1;';
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}
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// underline
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if (flags & 2) {
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out += '4;';
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}
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// blink
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if (flags & 4) {
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out += '5;';
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}
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// inverse
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if (flags & 8) {
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out += '7;';
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}
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// invisible
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if (flags & 16) {
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out += '8;';
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}
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if (bgColor !== 0x1ff) {
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if (bgColor < 16) { //|| this.tput.colors <= 16) {
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if (bgColor < 8) {
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bgColor += 40;
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} else if (bgColor < 16) {
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bgColor += 100;
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}
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out += bgColor + ';';
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} else {
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out += '48;5;' + bgColor + ';';
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}
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}
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if (fgColor !== 0x1ff) {
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if (fgColor < 16) { //|| this.tput.colors <= 16) {
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if (fgColor < 8) {
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fgColor += 30;
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} else if (fgColor < 16) {
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fgColor += 90;
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}
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out += fgColor + ';';
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} else {
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out += '38;5;' + fgColor + ';';
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}
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}
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if (out[out.length-1] === ';') out = out.slice(0, -1);
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out += 'm';
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}
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}
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out += ch;
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attr = data;
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}
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if (attr && attr !== this.dattr) {
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out += '\x1b[m';
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}
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//this.program.move(y + 1, 1);
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//this.program.write(out);
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this.program.write('\x1b[' + (y + 1) + ';1H' + out);
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}
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this.program.restoreCursor();
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};
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/**
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* Element
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*/
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function Element(options) {
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Node.call(this, options);
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this.screen = options.screen;
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this.parent = options.parent || (function(){throw Error('No parent.')})();
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this.position = {
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left: options.left || 0,
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right: options.right || 0,
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top: options.top || 0,
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bottom: options.bottom || 0,
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width: options.width || null,
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height: options.height || null
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};
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this.fg = options.fg || 0x1ff;
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this.bg = options.bg || 0x1ff;
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this.bold = options.bold ? 1 : 0;
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this.underline = options.underline ? 2 : 0;
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if (this.fg === -1) this.fg = exports.NORMAL;
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if (this.bg === -1) this.bg = exports.NORMAL;
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this.fixed = options.fixed || false;
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this.border = options.border;
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if (this.border) {
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this.border.type = this.border.type || 'bg';
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this.border.fg = this.border.fg || -1;
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this.border.bg = this.border.bg || -1;
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this.border.ch = this.border.ch || ' ';
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this.border.bold = this.border.bold ? 1 : 0;
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this.border.underline = this.border.underline ? 2 : 0;
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if (this.border.fg === -1) this.border.fg = exports.NORMAL;
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if (this.border.bg === -1) this.border.bg = exports.NORMAL;
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}
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this.children = options.children || [];
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this.clickable = this.clickable || false;
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this.hover = this.hover || false;
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this.content = options.content || '';
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}
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Element.prototype.__proto__ = Node.prototype;
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Element.prototype.__defineGetter__('left', function() {
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var left = this.position.left;
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if (typeof left === 'string') {
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if (left === 'center') left = '50%';
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left = +left.slice(0, -1) / 100;
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var len = Math.min(this.width, this.parent.width);
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left = (this.parent.width - len) * left | 0;
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}
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return (this.parent.left || 0) + left;
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});
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Element.prototype.__defineGetter__('right', function() {
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return (this.parent.right || 0) + this.position.right;
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});
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Element.prototype.__defineGetter__('top', function() {
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var top = this.position.top;
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if (typeof top === 'string') {
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if (top === 'center') top = '50%';
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top = +top.slice(0, -1) / 100;
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var len = Math.min(this.height, this.parent.height);
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top = (this.parent.height - len) * top | 0;
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}
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return (this.parent.top || 0) + top;
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});
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Element.prototype.__defineGetter__('bottom', function() {
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return (this.parent.bottom || 0) + this.position.bottom;
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});
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Element.prototype.__defineGetter__('width', function() {
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var width = this.position.width;
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if (typeof width === 'string') {
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if (width === 'half') width = '50%';
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width = +width.slice(0, -1) / 100;
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return this.parent.width * width | 0;
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}
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if (!width) {
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// Problem if .left is 'center', we can't calculate the width
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var left = this.position.left;
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if (typeof left === 'string') {
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if (left === 'center') left = '50%';
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left = +left.slice(0, -1) / 100;
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left = this.parent.width * left | 0;
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}
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width = this.parent.width - this.position.right - left;
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}
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return width;
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});
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Element.prototype.__defineGetter__('height', function() {
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var height = this.position.height;
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if (typeof height === 'string') {
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if (height === 'half') height = '50%';
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height = +height.slice(0, -1) / 100;
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return this.parent.height * height | 0;
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}
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if (!height) {
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// Problem if .top is 'center', we can't calculate the height
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var top = this.position.top;
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if (typeof top === 'string') {
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if (top === 'center') top = '50%';
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top = +top.slice(0, -1) / 100;
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top = this.parent.height * top | 0;
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}
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height = this.parent.height - this.position.bottom - top;
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}
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return height;
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});
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Element.prototype.__defineGetter__('rleft', function() {
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var left = this.position.left;
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if (typeof left === 'string') {
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if (left === 'center') left = '50%';
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left = +left.slice(0, -1) / 100;
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var len = Math.min(this.width, this.parent.width);
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left = len * left | 0;
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}
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return left;
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});
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Element.prototype.__defineGetter__('rright', function() {
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return this.position.right;
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});
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Element.prototype.__defineGetter__('rtop', function() {
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var top = this.position.top;
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if (typeof top === 'string') {
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if (top === 'center') top = '50%';
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top = +top.slice(0, -1) / 100;
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var len = Math.min(this.height, this.parent.height);
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top = len * top | 0;
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}
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return top;
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});
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Element.prototype.__defineGetter__('rbottom', function() {
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return this.position.bottom;
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});
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/**
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* Border Measures
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*/
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Element.prototype.__defineGetter__('bheight', function() {
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return this.height - (this.parent.border ? 1 : 0);
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});
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Element.prototype.__defineGetter__('bwidth', function() {
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return this.width - (this.parent.border ? 1 : 0);
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});
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Element.prototype.__defineGetter__('bleft', function() {
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return this.left + (this.parent.border ? 1 : 0);
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});
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Element.prototype.__defineGetter__('bright', function() {
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return this.right + (this.parent.border ? 1 : 0);
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});
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Element.prototype.__defineGetter__('btop', function() {
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return this.top + (this.parent.border ? 1 : 0);
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});
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Element.prototype.__defineGetter__('bbottom', function() {
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return this.bottom + (this.parent.border ? 1 : 0);
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});
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Element.prototype.__defineGetter__('brleft', function() {
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return this.rleft + (this.parent.border ? 1 : 0);
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});
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Element.prototype.__defineGetter__('brright', function() {
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return this.rright + (this.parent.border ? 1 : 0);
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});
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Element.prototype.__defineGetter__('brtop', function() {
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return this.rtop + (this.parent.border ? 1 : 0);
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});
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Element.prototype.__defineGetter__('brbottom', function() {
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return this.rbottom + (this.parent.border ? 1 : 0);
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});
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/**
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* Box
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*/
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function Box(options) {
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Element.call(this, options);
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}
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Box.prototype.__proto__ = Element.prototype;
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Box.prototype.render = function() {
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var lines = this.screen.lines
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, xi = this.left
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, xl = this.screen.cols - this.right
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, yi = this.top
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, yl = this.screen.rows - this.bottom
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, cell
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, attr
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, ch
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, ci = 0
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, cl = this.content.length;
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if (this.position.width) {
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xl = xi + this.width;
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}
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if (this.position.height) {
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yl = yi + this.height;
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}
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for (yi = this.top; yi < yl; yi++) {
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for (xi = this.left; xi < xl; xi++) {
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if (this.border && (yi === this.top || xi === this.left || yi === yl - 1 || xi === xl - 1)) {
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attr = ((this.border.bold << 18) + (this.border.underline << 18)) | (this.border.fg << 9) | this.border.bg;
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if (this.border.type === 'ascii') {
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if (yi === this.top) {
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if (xi === this.left) ch = '┌';
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else if (xi === xl - 1) ch = '┐';
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else ch = '─';
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} else if (yi === yl - 1) {
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if (xi === this.left) ch = '└';
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else if (xi === xl - 1) ch = '┘';
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else ch = '─';
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} else if (xi === this.left || xi === xl - 1) {
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ch = '│';
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}
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} else if (this.border.type === 'bg') {
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ch = this.border.ch;
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}
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} else {
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attr = ((this.bold << 18) + (this.underline << 18)) | (this.fg << 9) | this.bg;
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ch = this.content[ci++] || ' ';
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}
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cell = lines[yi][xi];
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if (attr !== cell[0] || ch !== cell[1]) {
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lines[yi][xi][0] = attr;
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lines[yi][xi][1] = ch;
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lines[yi].dirty = true;
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}
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}
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}
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this.children.forEach(function(el) {
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el.render();
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});
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//var o = { x: 0, y: 0 };
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//this.children.forEach(function(el) {
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// el.render(o);
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//});
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};
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/**
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* Text
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*/
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function Text(options) {
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Element.call(this, options);
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this.full = options.full;
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}
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Text.prototype.__proto__ = Element.prototype;
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Text.prototype.render = function() {
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var lines = this.screen.lines
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, xi = this.left
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, xl = this.screen.cols - this.right
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, yi = this.top
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, yl = this.screen.rows - this.bottom
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, cell
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, attr
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, ch
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, ci = 0
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, cl = this.content.length
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, ended = -1;
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if (this.position.width) {
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xl = xi + this.width;
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}
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if (this.position.height) {
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yl = yi + this.height;
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}
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if (this.full) {
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xl = xi + this.parent.width - (this.parent.border ? 2 : 0) - this.rleft - this.rright;
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}
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if (this.parent.childBase != null && ~this.parent.items.indexOf(this)) {
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var rtop = this.rtop - (this.parent.border ? 1 : 0)
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, visible = this.parent.height - (this.parent.border ? 2 : 0);
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yi -= this.parent.childBase;
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if (rtop - this.parent.childBase < 0) {
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return;
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}
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if (rtop - this.parent.childBase >= visible) {
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return;
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}
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}
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for (; yi < yl; yi++) {
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for (xi = this.left; xi < xl; xi++) {
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cell = lines[yi][xi];
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attr = ((this.bold << 18) + (this.underline << 18)) | (this.fg << 9) | this.bg;
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ch = this.content[ci++];
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if (!ch) {
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if (this.full) {
|
|
if (ended === -1) ended = yi;
|
|
if (yi === ended) {
|
|
ch = ' ';
|
|
} else {
|
|
break;
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
if (attr !== cell[0] || ch !== cell[1]) {
|
|
lines[yi][xi][0] = attr;
|
|
lines[yi][xi][1] = ch;
|
|
lines[yi].dirty = true;
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* ScrollableBox
|
|
*/
|
|
|
|
function ScrollableBox(options) {
|
|
Box.call(this, options);
|
|
this.childOffset = 0;
|
|
this.childBase = 0;
|
|
}
|
|
|
|
ScrollableBox.prototype.__proto__ = Box.prototype;
|
|
|
|
/**
|
|
* List
|
|
*/
|
|
|
|
function List(options) {
|
|
ScrollableBox.call(this, options);
|
|
|
|
this.items = [];
|
|
this.selected = 0;
|
|
|
|
this.selectedBg = options.selectedBg || -1;
|
|
this.selectedFg = options.selectedFg || -1;
|
|
this.selectedBold = options.selectedBold ? 1 : 0;
|
|
this.selectedUnderline = options.selectedUnderline ? 2 : 0;
|
|
|
|
if (this.selectedBg === -1) this.selectedBg = exports.NORMAL;
|
|
if (this.selectedFg === -1) this.selectedFg = exports.NORMAL;
|
|
|
|
if (options.items) {
|
|
options.items.forEach(this.add.bind(this));
|
|
}
|
|
|
|
if (this.children.length) {
|
|
this.select(0);
|
|
}
|
|
}
|
|
|
|
List.prototype.__proto__ = ScrollableBox.prototype;
|
|
|
|
List.prototype.add = function(item) {
|
|
var item = new Text({
|
|
screen: this.screen,
|
|
parent: this,
|
|
fg: this.fg,
|
|
bg: this.bg,
|
|
content: item.content || item,
|
|
top: this.items.length + (this.border ? 1 : 0),
|
|
left: (this.border ? 1 : 0) + 1,
|
|
full: true,
|
|
height: 1
|
|
});
|
|
this.append(item);
|
|
this.items.push(item);
|
|
};
|
|
|
|
List.prototype._remove = List.prototype.remove;
|
|
List.prototype.remove = function(child) {
|
|
if (typeof child === 'number') {
|
|
child = this.children[child];
|
|
}
|
|
var i = this.items.indexOf(child);
|
|
if (~i) this.items.splice(i, 1);
|
|
this._remove(child);
|
|
};
|
|
|
|
List.prototype.select = function(index) {
|
|
if (!this.items.length) return;
|
|
|
|
if (typeof index === 'object') {
|
|
index = this.items.indexOf(index);
|
|
}
|
|
|
|
if (index < 0) index = 0;
|
|
else if (index >= this.items.length) index = this.items.length - 1;
|
|
|
|
if (this.selected === index && this._listInitialized) return;
|
|
this._listInitialized = true;
|
|
|
|
if (this.selectedBg) {
|
|
this.items[this.selected].bg = this.bg;
|
|
this.items[index].bg = this.selectedBg;
|
|
}
|
|
|
|
if (this.selectedFg) {
|
|
this.items[this.selected].fg = this.fg;
|
|
this.items[index].fg = this.selectedFg;
|
|
}
|
|
|
|
if (this.selectedBold != null) {
|
|
this.items[this.selected].bold = this.bold;
|
|
this.items[index].bold = this.selectedBold;
|
|
}
|
|
|
|
if (this.selectedUnderline != null) {
|
|
this.items[this.selected].underline = this.underline;
|
|
this.items[index].underline = this.selectedUnderline;
|
|
}
|
|
|
|
var diff = index - this.selected;
|
|
this.childOffset += diff;
|
|
|
|
this.selected = index;
|
|
|
|
var visible = this.height - (this.border ? 2 : 0);
|
|
if (this.childOffset > visible - 1) {
|
|
var d = this.childOffset - (visible - 1);
|
|
this.childOffset -= d;
|
|
this.childBase += d;
|
|
} else if (this.childOffset < 0) {
|
|
var d = this.childOffset;
|
|
this.childOffset += -d;
|
|
this.childBase += d;
|
|
}
|
|
};
|
|
|
|
List.prototype.move = function(offset) {
|
|
this.select(this.selected + offset);
|
|
};
|
|
|
|
List.prototype.up = function(offset) {
|
|
this.move(-(offset || 1));
|
|
};
|
|
|
|
List.prototype.down = function(offset) {
|
|
this.move(offset || 1);
|
|
};
|
|
|
|
/**
|
|
* Input
|
|
*/
|
|
|
|
function Input(options) {
|
|
Box.call(this, options);
|
|
}
|
|
|
|
Input.prototype.__proto__ = Box.prototype;
|
|
|
|
/**
|
|
* Textbox
|
|
*/
|
|
|
|
function Textbox(options) {
|
|
Input.call(this, options);
|
|
}
|
|
|
|
Textbox.prototype.__proto__ = Input.prototype;
|
|
|
|
/**
|
|
* Button
|
|
*/
|
|
|
|
function Button(options) {
|
|
Input.call(this, options);
|
|
}
|
|
|
|
Button.prototype.__proto__ = Input.prototype;
|
|
|
|
/**
|
|
* ProgressBar
|
|
*/
|
|
|
|
function ProgressBar(options) {
|
|
Input.call(this, options);
|
|
this.filled = options.filled || 0;
|
|
if (typeof this.filled === 'string') {
|
|
this.filled = +this.filled.slice(0, -1);
|
|
}
|
|
this.ch = options.ch || ' ';
|
|
this.barFg = options.barFg || -1;
|
|
this.barBg = options.barBg || -1;
|
|
if (this.barFg === -1) this.barFg = exports.NORMAL;
|
|
if (this.barBg === -1) this.barBg = exports.NORMAL;
|
|
}
|
|
|
|
ProgressBar.prototype.__proto__ = Input.prototype;
|
|
|
|
ProgressBar.prototype._render = ProgressBar.prototype.render;
|
|
ProgressBar.prototype.render = function() {
|
|
this._render();
|
|
|
|
var x, y;
|
|
|
|
var h = this.height
|
|
, w = this.width * (this.filled / 100)
|
|
, l = this.left
|
|
, t = this.top;
|
|
|
|
for (y = t; y < t + h; y++) {
|
|
for (x = l; x < l + w; x++) {
|
|
attr = ((this.bold << 18) + (this.underline << 18)) | (this.barFg << 9) | this.barBg;
|
|
ch = this.ch;
|
|
cell = lines[yi][xi];
|
|
if (attr !== cell[0] || ch !== cell[1]) {
|
|
lines[yi][xi][0] = attr;
|
|
lines[yi][xi][1] = ch;
|
|
lines[yi].dirty = true;
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
ProgressBar.prototype.progress = function(filled) {
|
|
this.filled += filled;
|
|
if (this.filled < 0) this.filled = 0;
|
|
else if (this.filled > 100) this.filled = 100;
|
|
};
|
|
|
|
/**
|
|
* Constants
|
|
*/
|
|
|
|
exports.NORMAL = 0x1ff;
|
|
|
|
/**
|
|
* Expose
|
|
*/
|
|
|
|
exports.Screen = Screen;
|
|
exports.Box = Box;
|
|
exports.Text = Text;
|
|
exports.ScrollableBox = ScrollableBox;
|
|
exports.List = List;
|
|
exports.Input = Input;
|
|
exports.Textbox = Textbox;
|
|
exports.Button = Button;
|
|
exports.ProgressBar = ProgressBar;
|