rpd
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RPD is a minimal framework for building Node-Based User Interfaces, powered by Reactive Programming
285 lines (232 loc) • 12.3 kB
JavaScript
;(function(global) {
"use strict";
var Rpd = global.Rpd;
if (typeof Rpd === "undefined" && typeof require !== "undefined") {
Rpd = require('rpd');
}
Rpd.style('pd', 'svg', (function() {
var ƒ = Rpd.unit;
var δ = Rpd.Render.data;
// we need this canvas to be shared between all instances of a function below,
// it is used to measure node header width, since it contains text, we need
// some hidden element to measure string width in pixels
var globalLastCanvas;
var socketPadding = 25, // distance between inlets/outlets in SVG units
socketsMargin = 15; // distance between first/last inlet/outlet and body edge
var headerWidth = 0; // width of a node header in SVG units
function _createSvgElement(name) {
return document.createElementNS(d3.namespaces.svg, name);
}
function roundedRect(x, y, width, height, rtl, rtr, rbr, rbl) {
return "M" + x + "," + y
+ (rtl ? ("v" + rtl
+ "a" + rtl + "," + rtl + " 0 0 1 " + rtl + "," + -rtl) : "")
+ "h" + (width - (rtl ? rtl : 0) - (rtr ? rtr : 0))
+ (rtr ? ("a" + rtr + "," + rtr + " 0 0 1 " + rtr + "," + rtr) : "")
+ "v" + (height - (rtr ? rtr : 0) - (rbr ? rbr : 0))
+ (rbr ? ("a" + rbr + "," + rbr + " 0 0 1 " + -rbr + "," + rbr) : "")
+ "h" + ((rbr ? rbr : 0) + (rbl ? rbl : 0) - width)
+ (rbl ? ("a" + rbl + "," + rbl + " 0 0 1 " + -rbl + "," + -rbl) : "")
+ "v" + ((rbl ? rbl : 0) + (rtl ? rtl : 0) - height)
+ "z";
}
function getPos(elm) { var bounds = elm.getBoundingClientRect();
return { x: bounds.left, y: bounds.top } };
return function(config) {
var lastCanvas;
var listeners = {};
var inletToConnector = {},
outletToConnector = {};
return {
edgePadding: { horizontal: 20, vertical: 40 },
boxPadding: { horizontal: 20, vertical: 80 },
createCanvas: function(patch, parent) {
return {
element: d3.select(_createSvgElement('g'))
.classed('rpd-patch', true).node()
};
},
createNode: function(node, render, description, icon) {
// it is required to know the header size before constructing the node itself
var fakeName = d3.select(_createSvgElement('text'))
.attr('class', 'rpd-fake-name')
.text(node.def.title || node.type).attr('x', -1000).attr('y', -1000);
globalLastCanvas.append(ƒ(fakeName.node()));
var headerWidth = fakeName.node().getBBox().width + 12;
fakeName.remove();
var minContentSize = render.size ? { width: render.size.width || 100,
height: render.size.height || 40 }
: { width: 100, height: 40 };
function findBestNodeSize(numInlets, numOutlets, minContentSize) {
var requiredContentWidth = (2 * socketsMargin) + ((Math.max(numInlets, numOutlets) - 1) * socketPadding);
return { width: headerWidth + Math.max(requiredContentWidth, minContentSize.width),
height: minContentSize.height };
}
var initialSize = findBestNodeSize(node.def.inlets ? Object.keys(node.def.inlets).length : 0,
node.def.outlets ? Object.keys(node.def.outlets).length : 0,
minContentSize);
var width = initialSize.width, height = initialSize.height;
var bodyWidth = width - headerWidth,
bodyHeight = height;
var nodeElm = d3.select(_createSvgElement('g')).attr('class', 'rpd-node');
// append shadow
nodeElm.append('rect').attr('class', 'rpd-shadow')
.attr('width', width).attr('height', height)
.attr('x', 5).attr('y', 6).attr('rx', 3).attr('ry', 3);
// append node header
nodeElm.append('rect').attr('class', 'rpd-header').classed('rpd-drag-handle', true)
.attr('x', 0).attr('y', 0)
.attr('width', headerWidth).attr('height', height);
nodeElm.append('text').attr('class', 'rpd-name').text(node.def.title || node.type)
.attr('x', 5).attr('y', height / 2)
.style('pointer-events', 'none');
// append node body
nodeElm.append('rect').attr('class', 'rpd-content')
.attr('x', headerWidth).attr('y', 0)
.attr('width', width - headerWidth).attr('height', height);
nodeElm.append('rect').attr('class', 'rpd-body')
.attr('width', width).attr('height', height)
.style('pointer-events', 'none');
// append tooltip with description
nodeElm.select('.rpd-header')
.append(ƒ(_createSvgElement('title')))
.text(description ? (description + ' (' + node.type + ')') : node.type);
// append remove button
nodeElm.append('g').attr('class', 'rpd-remove-button')
.attr('transform', 'translate(' + (width-12) + ',1)')
.call(function(button) {
button.append('path').attr('d', roundedRect(0, 0, 11, 11, 2, 2, 2, 3))
.attr('class', 'rpd-remove-button-handle');
button.append('text').text('x').attr('x', 3).attr('y', 2)
.style('pointer-events', 'none');
});
// append placeholders for inlets, outlets and a target element to render body into
var inletsGroup = nodeElm.append('g').attr('class', 'rpd-inlets');
var processGroup = nodeElm.append('g').attr('class', 'rpd-process')
.attr('transform', 'translate(' + (headerWidth + ((width - headerWidth) / 2)) + ','
+ (height / 2) + ')');
var outletsGroup = nodeElm.append('g').attr('class', 'rpd-outlets')
.attr('transform', 'translate(' + 0 + ',' + height + ')');
δ(inletsGroup, { position: { x: 0, y: 0 } });
δ(outletsGroup, { position: { x: 0, y: height } });
nodeElm.classed('rpd-'+node.type.slice(0, node.type.indexOf('/'))+'-toolkit-node', true)
.classed('rpd-'+node.type.replace('/','-'), true);
var numInlets = 0, numOutlets = 0;
var inletElms = [], outletElms = [];
var lastSize = initialSize;
function checkNodeSize() {
var curSize = lastSize;
var newSize = findBestNodeSize(numInlets, numOutlets, minContentSize);
if ((newSize.width === curSize.width) && (newSize.height === curSize.height)) return;
nodeElm.select('rect.rpd-shadow').attr('height', newSize.height).attr('width', newSize.width);
nodeElm.select('rect.rpd-body').attr('height', newSize.height).attr('width', newSize.width);
nodeElm.select('rect.rpd-content').attr('width', newSize.width - headerWidth);
nodeElm.select('g.rpd-process').attr('transform',
'translate(' + (headerWidth + ((newSize.width - headerWidth) / 2)) + ',' + (newSize.height / 2) + ')');
nodeElm.select('.rpd-remove-button').attr('transform', 'translate(' + (newSize.width-12) + ',1)');
lastSize = newSize;
}
function recalculateSockets() {
inletElms.forEach(function(inletElm, idx) {
var inletPos = findInletPos(idx);
inletElm.attr('transform', 'translate(' + inletPos.x + ',' + inletPos.y + ')');
//δ(inletElm).position = inletPos;
});
outletElms.forEach(function(outletElm, idx) {
var outletPos = findOutletPos(idx);
outletElm.attr('transform', 'translate(' + outletPos.x + ',' + outletPos.y + ')');
//δ(outletElm).position = outletPos;
});
}
function notifyNewInlet(elm) {
numInlets++; inletElms.push(elm); checkNodeSize();
recalculateSockets();
}
function notifyNewOutlet(elm) {
numOutlets++; outletElms.push(elm); checkNodeSize();
recalculateSockets();
}
function findInletPos(idx) { // index from left to right
return { x: socketsMargin + (socketPadding * idx), y: 0 };
}
function findOutletPos(idx) { // index from left to right
return { x: socketsMargin + (socketPadding * idx), y: 1 };
}
listeners[node.id] = {
inlet: notifyNewInlet,
outlet: notifyNewOutlet
};
return {
element: nodeElm.node(),
size: initialSize
};
},
createInlet: function(inlet, render) {
var inletElm = d3.select(_createSvgElement('g')).attr('class', 'rpd-inlet');
inletElm.call(function(group) {
//group.attr('transform', 'translate(' + inletPos.x + ',' + inletPos.y + ')')
group.append('circle').attr('class', 'rpd-connector')
.attr('cx', 0).attr('cy', 0).attr('r', 2.5);
group.append('g').attr('class', 'rpd-value-holder')
.attr('transform', 'translate(0,-30)')
.append('text').attr('class', 'rpd-value');
group.append('text').attr('class', 'rpd-name').text(inlet.def.label || inlet.alias)
.attr('x', 0).attr('y', -15);
});
listeners[inlet.node.id].inlet(inletElm);
inletToConnector[inlet.id] = inletElm.select('.rpd-connector');
return { element: inletElm.node() };
},
createOutlet: function(outlet, render) {
var outletElm = d3.select(_createSvgElement('g')).attr('class', 'rpd-outlet');
outletElm.call(function(group) {
//group.attr('transform', 'translate(' + outletPos.x + ',' + outletPos.y + ')')
group.append('circle').attr('class', 'rpd-connector')
.attr('cx', 0).attr('cy', 0).attr('r', 2.5);
group.append('g').attr('class', 'rpd-value-holder')
.append('text').attr('class', 'rpd-value')
.attr('x', 0).attr('y', 30)
.style('pointer-events', 'none');
group.append('text').attr('class', 'rpd-name').text(outlet.def.label || outlet.alias)
.attr('x', 0).attr('y', 15);
});
listeners[outlet.node.id].outlet(outletElm);
outletToConnector[outlet.id] = outletElm.select('.rpd-connector');
return { element: outletElm.node() };
},
createLink: function(link) {
var linkElm = d3.select(_createSvgElement('line'))
.attr('class', 'rpd-link');
return { element: linkElm.node(),
rotate: function(x0, y0, x1, y1) {
linkElm.attr('x1', x0).attr('y1', y0)
.attr('x2', x1).attr('y2', y1);
},
noPointerEvents: function() {
linkElm.style('pointer-events', 'none');
} };
},
getInletPos: function(inlet) {
var connectorPos = getPos(inletToConnector[inlet.id].node());
return { x: connectorPos.x + 3, y: connectorPos.y + 3 };
},
getOutletPos: function(outlet) {
var connectorPos = getPos(outletToConnector[outlet.id].node());
return { x: connectorPos.x + 3, y: connectorPos.y + 3 };
},
getLocalPos: function(pos) {
if (!lastCanvas) return pos;
// calculate once on patch switch?
var canvasPos = getPos(lastCanvas.node());
return { x: pos.x - canvasPos.x, y: pos.y - canvasPos.y };
},
onPatchSwitch: function(patch, canvas) {
lastCanvas = d3.select(canvas);
globalLastCanvas = lastCanvas;
},
onNodeRemove: function(node) {
listeners[node.id] = null;
}
};
} })());
})(this);