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// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
var TYPE_HEIGHT = 25;
var DEFAULT_NODE_BUBBLE_RADIUS = 12;
var NODE_INPUT_WIDTH = 50;
var MINIMUM_NODE_INPUT_APPROACH = 15 + 2 * DEFAULT_NODE_BUBBLE_RADIUS;
var MINIMUM_NODE_OUTPUT_APPROACH = 15;
function isNodeInitiallyVisible(node) {
return node.cfg;
}
var Node = {
isControl: function() {
return this.control;
},
isInput: function() {
return this.opcode == 'Parameter' || this.opcode.endsWith('Constant');
},
isLive: function() {
return this.live !== false;
},
isJavaScript: function() {
return this.opcode.startsWith('JS');
},
isSimplified: function() {
if (this.isJavaScript) return false;
return this.opcode.endsWith('Phi') ||
this.opcode.startsWith('Boolean') ||
this.opcode.startsWith('Number') ||
this.opcode.startsWith('String') ||
this.opcode.startsWith('Change') ||
this.opcode.startsWith('Object') ||
this.opcode.startsWith('Reference') ||
this.opcode.startsWith('Any') ||
this.opcode.endsWith('ToNumber') ||
(this.opcode == 'AnyToBoolean') ||
(this.opcode.startsWith('Load') && this.opcode.length > 4) ||
(this.opcode.startsWith('Store') && this.opcode.length > 5);
},
isMachine: function() {
return !(this.isControl() || this.isInput() ||
this.isJavaScript() || this.isSimplified());
},
getTotalNodeWidth: function() {
var inputWidth = this.inputs.length * NODE_INPUT_WIDTH;
return Math.max(inputWidth, this.width);
},
getTitle: function() {
var propsString;
if (this.properties === undefined) {
propsString = "";
} else if (this.properties === "") {
propsString = "no properties";
} else {
propsString = "[" + this.properties + "]";
}
return this.title + "\n" + propsString + "\n" + this.opinfo;
},
getDisplayLabel: function() {
var result = this.id + ":" + this.label;
if (result.length > 40) {
return this.id + ":" + this.opcode;
} else {
return result;
}
},
getType: function() {
return this.type;
},
getDisplayType: function() {
var type_string = this.type;
if (type_string == undefined) return "";
if (type_string.length > 24) {
type_string = type_string.substr(0, 25) + "...";
}
return type_string;
},
deepestInputRank: function() {
var deepestRank = 0;
this.inputs.forEach(function(e) {
if (e.isVisible() && !e.isBackEdge()) {
if (e.source.rank > deepestRank) {
deepestRank = e.source.rank;
}
}
});
return deepestRank;
},
areAnyOutputsVisible: function() {
var visibleCount = 0;
this.outputs.forEach(function(e) { if (e.isVisible()) ++visibleCount; });
if (this.outputs.length == visibleCount) return 2;
if (visibleCount != 0) return 1;
return 0;
},
setOutputVisibility: function(v) {
var result = false;
this.outputs.forEach(function(e) {
e.visible = v;
if (v) {
if (!e.target.visible) {
e.target.visible = true;
result = true;
}
}
});
return result;
},
setInputVisibility: function(i, v) {
var edge = this.inputs[i];
edge.visible = v;
if (v) {
if (!edge.source.visible) {
edge.source.visible = true;
return true;
}
}
return false;
},
getInputApproach: function(index) {
return this.y - MINIMUM_NODE_INPUT_APPROACH -
(index % 4) * MINIMUM_EDGE_SEPARATION - DEFAULT_NODE_BUBBLE_RADIUS
},
getOutputApproach: function(graph, index) {
return this.y + this.outputApproach + graph.getNodeHeight(this) +
+ DEFAULT_NODE_BUBBLE_RADIUS;
},
getInputX: function(index) {
var result = this.getTotalNodeWidth() - (NODE_INPUT_WIDTH / 2) +
(index - this.inputs.length + 1) * NODE_INPUT_WIDTH;
return result;
},
getOutputX: function() {
return this.getTotalNodeWidth() - (NODE_INPUT_WIDTH / 2);
},
getFunctionRelativeSourcePosition: function(graph) {
return this.pos - graph.sourcePosition;
},
hasBackEdges: function() {
return (this.opcode == "Loop") ||
((this.opcode == "Phi" || this.opcode == "EffectPhi") &&
this.inputs[this.inputs.length - 1].source.opcode == "Loop");
}
};
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