1 | package com.framsticks.framclipse.editors.codeCompletion; |
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2 | |
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3 | import java.util.ArrayList; |
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4 | import java.util.Collections; |
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5 | import java.util.List; |
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6 | import java.util.Set; |
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7 | |
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8 | import org.eclipse.jface.text.IDocument; |
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9 | import org.eclipse.jface.text.ITextViewer; |
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10 | import org.eclipse.jface.text.TextPresentation; |
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11 | import org.eclipse.jface.text.contentassist.ContextInformation; |
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12 | import org.eclipse.jface.text.contentassist.ICompletionProposal; |
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13 | import org.eclipse.jface.text.contentassist.IContentAssistProcessor; |
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14 | import org.eclipse.jface.text.contentassist.IContextInformation; |
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15 | import org.eclipse.jface.text.contentassist.IContextInformationPresenter; |
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16 | import org.eclipse.jface.text.contentassist.IContextInformationValidator; |
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17 | import org.eclipse.ui.IEditorInput; |
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18 | import org.eclipse.ui.IFileEditorMapping; |
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19 | import org.eclipse.ui.IPathEditorInput; |
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20 | import org.jdom.Attribute; |
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21 | import org.jdom.Document; |
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22 | import org.jdom.Element; |
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23 | import org.jdom.xpath.XPath; |
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24 | |
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25 | import com.framsticks.framclipse.Framclipse; |
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26 | import com.framsticks.framclipse.editors.EditorType; |
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27 | import com.framsticks.framclipse.editors.FramclipseEditor; |
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28 | import com.framsticks.framclipse.internal.parser.ASTFObject; |
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29 | import com.framsticks.framclipse.internal.parser.ASTGlobalInclude; |
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30 | import com.framsticks.framclipse.internal.parser.ASTProperty; |
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31 | import com.framsticks.framclipse.internal.parser.FramclipseParser; |
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32 | import com.framsticks.framclipse.internal.parser.Node; |
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33 | import com.framsticks.framclipse.syntaxColoring.FramscriptCodeScanner; |
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34 | |
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35 | |
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36 | /** |
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37 | * Framscript completion processor. |
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38 | */ |
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39 | public class FramscriptCompletionProcessor implements IContentAssistProcessor { |
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40 | |
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41 | private final Set<String> contexts; |
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42 | |
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43 | protected final FramclipseEditor editor; |
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44 | |
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45 | protected final EditorType editorType; |
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46 | |
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47 | protected FramclipseParser parser; |
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48 | |
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49 | public FramscriptCompletionProcessor(Set<String> contexts, |
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50 | FramclipseEditor editor, EditorType editorType) { |
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51 | super(); |
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52 | this.contexts = contexts; |
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53 | this.editor = editor; |
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54 | this.editorType = editorType; |
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55 | } |
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56 | |
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57 | protected IContextInformationValidator validator = new Validator(); |
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58 | |
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59 | /* |
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60 | * (non-Javadoc) Method declared on IContentAssistProcessor |
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61 | */ |
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62 | @SuppressWarnings("unchecked") |
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63 | public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, |
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64 | int documentOffset) { |
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65 | |
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66 | // get text before cursor |
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67 | IDocument document = viewer.getDocument(); |
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68 | String elementPart = SyntaxUtils.getElementBefore(document, |
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69 | documentOffset); |
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70 | |
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71 | // check if there is a dot before this text -> then fetch parent |
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72 | int offset = documentOffset - elementPart.length() - 1; |
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73 | |
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74 | String parent = null; |
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75 | List<String> elementsBefore = SyntaxUtils.getElementsBefore(document, |
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76 | offset); |
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77 | try { |
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78 | parent = SyntaxUtils.getLastElementType(elementsBefore); |
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79 | } catch (Exception e1) { |
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80 | e1.printStackTrace(); |
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81 | } |
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82 | |
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83 | // now if we have parent, ask XPath |
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84 | List<OrderableCompletionProposal> proposals = new ArrayList<OrderableCompletionProposal>(); |
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85 | if (EditorType.EXPDEF.equals(editorType) && "ExpParams".equals(parent)) { |
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86 | addExpParamsProposals(viewer.getDocument(), documentOffset, |
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87 | elementPart, proposals); |
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88 | } else { |
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89 | String query = SyntaxUtils.ROOT + "/*"; |
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90 | if ((parent != null) && (parent.length() > 0)) { |
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91 | query += "[@" + SyntaxUtils.NAME_ATTRIBUTE + "='" + parent |
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92 | + "']/" + SyntaxUtils.ELEMENT_ELEMENT; |
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93 | } |
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94 | Document syntax = Framclipse.getDefault().getFramscriptSyntax(); |
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95 | try { |
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96 | XPath xpath = XPath.newInstance(query); |
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97 | List<Element> list = xpath.selectNodes(syntax); |
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98 | for (Element element : list) { |
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99 | Attribute context = element |
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100 | .getAttribute(SyntaxUtils.CONTEXT_ATTRIBUTE); |
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101 | if ((context == null) |
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102 | || contexts.contains(context.getValue())) { |
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103 | addCompletion(element, documentOffset, elementPart, |
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104 | proposals); |
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105 | } |
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106 | } |
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107 | } catch (Exception e) { |
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108 | e.printStackTrace(); |
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109 | } |
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110 | } |
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111 | if (parent == null || parent.length() == 0) |
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112 | addKeywordProposals(documentOffset, elementPart, proposals); |
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113 | |
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114 | Collections.sort(proposals); |
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115 | |
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116 | ICompletionProposal[] result = new ICompletionProposal[proposals.size()]; |
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117 | result = proposals.toArray(result); |
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118 | return result; |
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119 | } |
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120 | |
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121 | void addExpParamsProposals(IDocument document, int documentOffset, |
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122 | String elementPart, List<OrderableCompletionProposal> proposals) { |
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123 | Node model = editor.getFileModel(); |
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124 | if (model == null) |
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125 | return; |
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126 | processExpParamNode(model, documentOffset, elementPart, proposals); |
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127 | } |
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128 | |
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129 | static void processExpParamNode(Node model, int documentOffset, |
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130 | String elementPart, List<OrderableCompletionProposal> proposals) { |
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131 | { |
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132 | final int modelNumChild = model.jjtGetNumChildren(); |
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133 | for (int i = 0; i < modelNumChild; ++i) { |
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134 | final Node child = model.jjtGetChild(i); |
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135 | if (child instanceof ASTFObject) { |
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136 | final ASTFObject fo = (ASTFObject) child; |
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137 | if ("prop".equals(fo.getClassName())) { |
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138 | String id = "", name = null, type = null; |
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139 | final int numChildren = fo.jjtGetNumChildren(); |
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140 | for (int j = 0; j < numChildren; j++) { |
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141 | final Node fochild = fo.jjtGetChild(j); |
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142 | if (fochild instanceof ASTProperty) { |
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143 | final ASTProperty prop = (ASTProperty) fochild; |
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144 | final String pname = prop.getName(); |
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145 | if ("id".equalsIgnoreCase(pname)) { |
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146 | id = prop.getValue(); |
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147 | if (id == null || id.length() == 0 |
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148 | || !id.startsWith(elementPart)) { |
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149 | break; |
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150 | } |
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151 | } else if ("name".equalsIgnoreCase(pname)) { |
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152 | name = prop.getValue(); |
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153 | } else if ("type".equalsIgnoreCase(pname)) { |
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154 | type = prop.getValue(); |
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155 | } |
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156 | } |
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157 | } |
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158 | addExpdefCompletion(documentOffset, elementPart, |
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159 | proposals, id, name, type); |
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160 | } |
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161 | } else if (child instanceof ASTGlobalInclude) { |
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162 | processExpParamNode(child, documentOffset, elementPart, |
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163 | proposals); |
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164 | } |
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165 | } |
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166 | } |
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167 | } |
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168 | |
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169 | static void addExpdefCompletion(int documentOffset, String elementPart, |
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170 | List<OrderableCompletionProposal> proposals, String id, |
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171 | String name, String type) { |
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172 | |
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173 | if (id == null || id.length() == 0 || !id.startsWith(elementPart)) |
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174 | return; |
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175 | String descr = id; |
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176 | if (type != null) { |
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177 | type = type.trim(); |
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178 | final char t = type.charAt(0); |
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179 | final String typeName = SyntaxUtils.typeName(t); |
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180 | if (typeName != null) |
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181 | type = typeName; |
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182 | descr += " " + type; |
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183 | } |
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184 | if (name != null) |
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185 | descr += " (" + name + ")"; |
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186 | final OrderableCompletionProposal prop = new OrderableCompletionProposal( |
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187 | id, documentOffset - elementPart.length(), |
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188 | elementPart.length(), id.length() - 1, null, descr, null, null); |
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189 | prop.setName(id); |
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190 | proposals.add(prop); |
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191 | } |
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192 | |
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193 | void addKeywordProposals(int documentOffset, String elementPart, |
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194 | List<OrderableCompletionProposal> proposals) { |
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195 | for (String kwd : FramscriptCodeScanner.keywords) { |
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196 | if (kwd.startsWith(elementPart)) { |
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197 | OrderableCompletionProposal prop = getProposalForKeyword(kwd, |
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198 | documentOffset, elementPart); |
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199 | proposals.add(prop); |
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200 | } |
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201 | } |
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202 | } |
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203 | |
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204 | /** |
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205 | * Function to customize the creation of completion proposals based on the |
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206 | * current keyword. For example, the <code>if</code> keyword gets some |
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207 | * additional parentheses. |
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208 | * |
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209 | * @param kwd |
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210 | * @param documentOffset |
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211 | * @param elementPart |
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212 | * @return |
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213 | */ |
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214 | OrderableCompletionProposal getProposalForKeyword(String kwd, |
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215 | int documentOffset, String elementPart) { |
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216 | OrderableCompletionProposal prop = null; |
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217 | |
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218 | if ("if".equals(kwd)) { |
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219 | String repString = kwd + " ()"; |
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220 | prop = new OrderableCompletionProposal(repString, documentOffset |
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221 | - elementPart.length(), elementPart.length(), repString |
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222 | .length() - 1, null, kwd + " keyword", null, null); |
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223 | } else { |
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224 | prop = new OrderableCompletionProposal(kwd, documentOffset |
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225 | - elementPart.length(), elementPart.length(), kwd.length(), |
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226 | null, kwd + " keyword", null, null); |
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227 | } |
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228 | |
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229 | prop.setName(kwd); |
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230 | return prop; |
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231 | } |
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232 | |
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233 | @SuppressWarnings("unchecked") |
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234 | private void addCompletion(Element element, int documentOffset, |
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235 | String elementPart, List<OrderableCompletionProposal> proposals) { |
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236 | String name = element.getAttributeValue(SyntaxUtils.NAME_ATTRIBUTE); |
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237 | String completion = name; |
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238 | int cursorPosition = name.length(); |
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239 | String functionValue = element |
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240 | .getAttributeValue(SyntaxUtils.FUNCTION_ATTRIBUTE); |
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241 | boolean function = (functionValue != null) |
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242 | && functionValue.equals("true"); |
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243 | String displayString = ""; |
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244 | IContextInformation contextInformation = null; |
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245 | displayString = completion; |
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246 | if (function) { |
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247 | completion += "()"; |
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248 | displayString += "("; |
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249 | Element arguments = element.getChild(SyntaxUtils.ARGUMENTS_ELEMENT); |
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250 | if (arguments != null) { |
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251 | List<Element> argumentsList = arguments |
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252 | .getChildren(SyntaxUtils.ARGUMENT_ELEMENT); |
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253 | for (Element argument : argumentsList) { |
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254 | String attributeType = argument |
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255 | .getAttributeValue(SyntaxUtils.TYPE_ATTRIBUTE); |
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256 | if ((attributeType == null) |
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257 | || (attributeType.length() == 0)) { |
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258 | attributeType = "void"; |
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259 | } |
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260 | String attributeName = argument |
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261 | .getAttributeValue(SyntaxUtils.NAME_ATTRIBUTE); |
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262 | displayString += attributeType + " " + attributeName + ", "; |
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263 | } |
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264 | if (argumentsList.size() > 0) { |
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265 | displayString = displayString.substring(0, displayString |
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266 | .length() - 2); |
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267 | } |
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268 | } |
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269 | displayString += ")"; |
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270 | contextInformation = new ContextInformation(completion, |
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271 | displayString); |
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272 | cursorPosition++; |
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273 | } |
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274 | |
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275 | String type = element.getAttributeValue(SyntaxUtils.TYPE_ATTRIBUTE); |
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276 | if ((type != null) && (type.length() > 0)) { |
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277 | displayString += " " + type; |
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278 | } |
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279 | |
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280 | String context = element |
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281 | .getAttributeValue(SyntaxUtils.CONTEXT_ATTRIBUTE); |
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282 | if ((context != null) && (context.length() > 0)) { |
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283 | displayString += " (" + context + ")"; |
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284 | } |
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285 | |
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286 | if (completion.startsWith(elementPart)) { |
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287 | int replacementLength = elementPart.length(); |
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288 | int replacementOffset = documentOffset - replacementLength; |
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289 | OrderableCompletionProposal completionProposal = new OrderableCompletionProposal( |
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290 | completion, replacementOffset, replacementLength, |
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291 | cursorPosition, null, displayString, contextInformation, |
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292 | null); |
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293 | completionProposal.setName(name); |
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294 | completionProposal.setFunction(function); |
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295 | proposals.add(completionProposal); |
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296 | } |
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297 | } |
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298 | |
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299 | /* |
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300 | * (non-Javadoc) Method declared on IContentAssistProcessor |
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301 | */ |
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302 | public IContextInformation[] computeContextInformation(ITextViewer viewer, |
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303 | int documentOffset) { |
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304 | return null; |
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305 | } |
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306 | |
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307 | /* |
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308 | * (non-Javadoc) Method declared on IContentAssistProcessor |
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309 | */ |
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310 | public char[] getCompletionProposalAutoActivationCharacters() { |
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311 | return new char[] { '.' }; |
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312 | } |
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313 | |
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314 | /* |
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315 | * (non-Javadoc) Method declared on IContentAssistProcessor |
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316 | */ |
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317 | public char[] getContextInformationAutoActivationCharacters() { |
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318 | return new char[] {}; |
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319 | } |
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320 | |
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321 | /* |
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322 | * (non-Javadoc) Method declared on IContentAssistProcessor |
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323 | */ |
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324 | public IContextInformationValidator getContextInformationValidator() { |
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325 | return validator; |
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326 | } |
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327 | |
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328 | public FramclipseEditor getEditor() { |
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329 | return editor; |
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330 | } |
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331 | |
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332 | /* |
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333 | * (non-Javadoc) Method declared on IContentAssistProcessor |
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334 | */ |
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335 | public String getErrorMessage() { |
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336 | return null; |
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337 | } |
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338 | |
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339 | /** |
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340 | * Simple content assist tip closer. The tip is valid in a range of 5 |
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341 | * characters around its popup location. |
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342 | */ |
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343 | protected static class Validator implements IContextInformationValidator, |
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344 | IContextInformationPresenter { |
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345 | |
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346 | protected int installOffset; |
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347 | |
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348 | /* |
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349 | * @see IContextInformationValidator#isContextInformationValid(int) |
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350 | */ |
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351 | public boolean isContextInformationValid(int offset) { |
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352 | return Math.abs(installOffset - offset) < 5; |
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353 | } |
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354 | |
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355 | /* |
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356 | * @see IContextInformationValidator#install(IContextInformation, |
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357 | * ITextViewer, int) |
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358 | */ |
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359 | public void install(IContextInformation info, ITextViewer viewer, |
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360 | int offset) { |
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361 | installOffset = offset; |
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362 | } |
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363 | |
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364 | /* |
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365 | * @see |
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366 | * org.eclipse.jface.text.contentassist.IContextInformationPresenter |
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367 | * #updatePresentation(int, TextPresentation) |
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368 | */ |
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369 | public boolean updatePresentation(int documentPosition, |
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370 | TextPresentation presentation) { |
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371 | return false; |
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372 | } |
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373 | } |
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374 | } |
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