1 //===-- Support/DotGraphTraits.h - Customize .dot output --------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines a template class that can be used to customize dot output
11 // graphs generated by the GraphWriter.h file. The default implementation of
12 // this file will produce a simple, but not very polished graph. By
13 // specializing this template, lots of customization opportunities are possible.
15 //===----------------------------------------------------------------------===//
17 #ifndef SUPPORT_DOTGRAPHTRAITS_H
18 #define SUPPORT_DOTGRAPHTRAITS_H
22 /// DefaultDOTGraphTraits - This class provides the default implementations of
23 /// all of the DOTGraphTraits methods. If a specialization does not need to
24 /// override all methods here it should inherit so that it can get the default
27 struct DefaultDOTGraphTraits {
28 /// getGraphName - Return the label for the graph as a whole. Printed at the
31 static std::string getGraphName(const void *Graph) { return ""; }
33 /// getGraphProperties - Return any custom properties that should be included
34 /// in the top level graph structure for dot. By default, we resize the graph
35 /// to fit on a letter size page.
37 static std::string getGraphProperties(const void *Graph) {
38 return "\tsize=\"7.5,10\";\n"; // Size to fit on a page
41 /// getNodeLabel - Given a node and a pointer to the top level graph, return
42 /// the label to print in the node.
43 static std::string getNodeLabel(const void *Node, const void *Graph) {
47 /// If you want to specify custom node attributes, this is the place to do so
49 static std::string getNodeAttributes(const void *Node) { return ""; }
51 /// If you want to override the dot attributes printed for a particular edge,
52 /// override this method.
53 template<typename EdgeIter>
54 static std::string getEdgeAttributes(const void *Node, EdgeIter EI) {
58 /// getEdgeSourceLabel - If you want to label the edge source itself,
59 /// implement this method.
60 template<typename EdgeIter>
61 static std::string getEdgeSourceLabel(const void *Node, EdgeIter I) {
65 /// edgeTargetsEdgeSource - This method returns true if this outgoing edge
66 /// should actually target another edge source, not a node. If this method is
67 /// implemented, getEdgeTarget should be implemented.
68 template<typename EdgeIter>
69 static bool edgeTargetsEdgeSource(const void *Node, EdgeIter I) {
73 /// getEdgeTarget - If edgeTargetsEdgeSource returns true, this method is
74 /// called to determine which outgoing edge of Node is the target of this
76 template<typename EdgeIter>
77 static EdgeIter getEdgeTarget(const void *Node, EdgeIter I) {
81 /// addCustomGraphFeatures - If a graph is made up of more than just
82 /// straight-forward nodes and edges, this is the place to put all of the
83 /// custom stuff necessary. The GraphWriter object, instantiated with your
84 /// GraphType is passed in as an argument. You may call arbitrary methods on
85 /// it to add things to the output graph.
87 template<typename GraphWriter>
88 static void addCustomGraphFeatures(const void *Graph, GraphWriter &GW) {}
92 /// DOTGraphTraits - Template class that can be specialized to customize how
93 /// graphs are converted to 'dot' graphs. When specializing, you may inherit
94 /// from DefaultDOTGraphTraits if you don't need to override everything.
96 template <typename Ty>
97 class DOTGraphTraits : public DefaultDOTGraphTraits {};