[193] | 1 | package com.framsticks.framclipse.editors.hover; |
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| 2 | |
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| 3 | import java.util.List; |
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| 4 | |
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| 5 | import org.eclipse.jface.internal.text.html.BrowserInformationControl; |
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| 6 | import org.eclipse.jface.internal.text.html.HTMLTextPresenter; |
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| 7 | import org.eclipse.jface.resource.JFaceResources; |
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| 8 | import org.eclipse.jface.text.AbstractReusableInformationControlCreator; |
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| 9 | import org.eclipse.jface.text.BadLocationException; |
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| 10 | import org.eclipse.jface.text.DefaultInformationControl; |
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| 11 | import org.eclipse.jface.text.IDocument; |
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| 12 | import org.eclipse.jface.text.IInformationControl; |
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| 13 | import org.eclipse.jface.text.IInformationControlCreator; |
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| 14 | import org.eclipse.jface.text.IInformationControlExtension4; |
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| 15 | import org.eclipse.jface.text.IRegion; |
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| 16 | import org.eclipse.jface.text.ITextHover; |
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| 17 | import org.eclipse.jface.text.ITextHoverExtension; |
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| 18 | import org.eclipse.jface.text.ITextViewer; |
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| 19 | import org.eclipse.jface.text.Region; |
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| 20 | import org.eclipse.jface.text.information.IInformationProviderExtension2; |
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| 21 | import org.eclipse.swt.SWT; |
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| 22 | import org.eclipse.swt.widgets.Shell; |
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| 23 | import org.eclipse.ui.editors.text.EditorsUI; |
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| 24 | import org.jdom.Document; |
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| 25 | import org.jdom.Element; |
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| 26 | import org.jdom.JDOMException; |
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| 27 | import org.jdom.xpath.XPath; |
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| 28 | |
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| 29 | import com.framsticks.framclipse.Framclipse; |
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| 30 | import com.framsticks.framclipse.editors.codeCompletion.SyntaxUtils; |
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| 31 | |
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| 32 | |
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| 33 | public class FramscriptTextHover implements ITextHover, ITextHoverExtension, IInformationProviderExtension2 { |
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| 34 | |
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| 35 | private static final class PresenterControlCreator extends AbstractReusableInformationControlCreator { |
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| 36 | |
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| 37 | public IInformationControl doCreateInformationControl(Shell parent) { |
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| 38 | // int shellStyle= SWT.RESIZE | SWT.TOOL; |
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| 39 | // int style= SWT.V_SCROLL | SWT.H_SCROLL; |
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| 40 | // if (BrowserInformationControl.isAvailable(parent)) { |
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| 41 | // return new BrowserInformationControl(parent, JFaceResources.DIALOG_FONT, true); |
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| 42 | // return new BrowserInformationControl(parent, shellStyle, style); |
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| 43 | // } else |
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| 44 | // return new DefaultInformationControl(parent, shellStyle, style, new HTMLTextPresenter(false)); |
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| 45 | return new DefaultInformationControl(parent, true); |
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| 46 | } |
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| 47 | } |
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| 48 | |
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| 49 | private static final class HoverControlCreator extends AbstractReusableInformationControlCreator { |
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| 50 | |
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| 51 | public IInformationControl doCreateInformationControl(Shell parent) { |
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| 52 | // if (BrowserInformationControl.isAvailable(parent)) { |
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| 53 | // return new BrowserInformationControl(parent, JFaceResources.DIALOG_FONT, true); |
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| 54 | // return new BrowserInformationControl(parent, SWT.TOOL | SWT.NO_TRIM, SWT.NONE, EditorsUI.getTooltipAffordanceString()); |
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| 55 | // } else { |
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| 56 | // return new DefaultInformationControl(parent, SWT.NONE, new HTMLTextPresenter(true), EditorsUI.getTooltipAffordanceString()); |
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| 57 | return new DefaultInformationControl(parent, true); |
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| 58 | // } |
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| 59 | } |
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| 60 | |
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| 61 | /* |
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| 62 | * @see org.eclipse.jdt.internal.ui.text.java.hover.AbstractReusableInformationControlCreator#canReuse(org.eclipse.jface.text.IInformationControl) |
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| 63 | */ |
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| 64 | public boolean canReuse(IInformationControl control) { |
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| 65 | if (!super.canReuse(control)) |
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| 66 | return false; |
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| 67 | |
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| 68 | if (control instanceof IInformationControlExtension4) |
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| 69 | ((IInformationControlExtension4)control).setStatusText(EditorsUI.getTooltipAffordanceString()); |
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| 70 | |
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| 71 | return true; |
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| 72 | } |
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| 73 | } |
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| 74 | |
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| 75 | |
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| 76 | |
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| 77 | private static final int DESCRIPTION_LENGTH = 60; |
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| 78 | |
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| 79 | private IInformationControlCreator fHoverControlCreator; |
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| 80 | |
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| 81 | private IInformationControlCreator fPresenterControlCreator; |
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| 82 | |
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| 83 | public IInformationControlCreator getInformationPresenterControlCreator() { |
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| 84 | if (fPresenterControlCreator == null) |
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| 85 | fPresenterControlCreator= new PresenterControlCreator(); |
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| 86 | return fPresenterControlCreator; |
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| 87 | } |
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| 88 | |
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| 89 | public IInformationControlCreator getHoverControlCreator() { |
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| 90 | if (fHoverControlCreator == null) |
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| 91 | fHoverControlCreator= new HoverControlCreator(); |
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| 92 | return fHoverControlCreator; |
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| 93 | } |
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| 94 | |
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| 95 | public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) { |
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| 96 | int offset = hoverRegion.getOffset() + hoverRegion.getLength(); |
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| 97 | IDocument document = textViewer.getDocument(); |
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| 98 | |
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| 99 | List<String> elements = SyntaxUtils.getElementsAt(document, offset); |
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| 100 | |
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| 101 | if (elements.size() == 0) { |
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| 102 | return null; |
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| 103 | } |
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| 104 | |
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| 105 | String name = elements.remove(elements.size() - 1); |
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| 106 | String elementFormat = "%s[@" + SyntaxUtils.NAME_ATTRIBUTE + "='%s']/"; |
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| 107 | String query = SyntaxUtils.ROOT + "/"; |
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| 108 | |
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| 109 | if (elements.size() == 0) { |
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| 110 | query += String.format(elementFormat, SyntaxUtils.TYPE_ELEMENT, name); |
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| 111 | } else { // elements.size() > 1 |
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| 112 | String parent; |
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| 113 | try { |
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| 114 | parent = SyntaxUtils.getLastElementType(elements); |
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| 115 | } catch (JDOMException e) { |
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| 116 | e.printStackTrace(); |
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| 117 | return null; |
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| 118 | } |
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| 119 | query += String.format(elementFormat, SyntaxUtils.TYPE_ELEMENT, parent) |
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| 120 | + String.format(elementFormat, SyntaxUtils.ELEMENT_ELEMENT, name); |
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| 121 | } |
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| 122 | query += SyntaxUtils.DESCRIPTION_ELEMENT; |
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| 123 | |
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| 124 | Document syntax = Framclipse.getDefault().getFramscriptSyntax(); |
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| 125 | try { |
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| 126 | XPath xpath = XPath.newInstance(query); |
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| 127 | Element element = (Element) xpath.selectSingleNode(syntax); |
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| 128 | if (element == null) { |
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| 129 | return null; |
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| 130 | } |
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| 131 | |
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| 132 | return formatDescription(element.getValue()); |
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| 133 | } catch (Exception e) { |
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| 134 | e.printStackTrace(); |
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| 135 | } |
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| 136 | |
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| 137 | return null; |
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| 138 | } |
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| 139 | |
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| 140 | public IRegion getHoverRegion(ITextViewer textViewer, int offset) { |
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| 141 | IDocument document = textViewer.getDocument(); |
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| 142 | String after = SyntaxUtils.getElementAfter(document, offset); |
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| 143 | |
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| 144 | int line = 0; |
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| 145 | try { |
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| 146 | line = document.getLineOfOffset(offset); |
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| 147 | } catch (BadLocationException e) { |
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| 148 | e.printStackTrace(); |
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| 149 | } |
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| 150 | |
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| 151 | int lineStart = offset; |
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| 152 | try { |
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| 153 | lineStart = document.getLineInformation(line).getOffset(); |
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| 154 | } catch (BadLocationException e) { |
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| 155 | e.printStackTrace(); |
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| 156 | } |
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| 157 | IRegion region = new Region(lineStart, offset + after.length() - lineStart); |
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| 158 | |
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| 159 | return region; |
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| 160 | } |
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| 161 | |
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| 162 | private static String formatDescription(String description) { |
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| 163 | String result = ""; |
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| 164 | int offset = 0; |
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| 165 | while (offset < description.length()) { |
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| 166 | int length = DESCRIPTION_LENGTH; |
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| 167 | if (offset + length > description.length()) { |
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| 168 | result += description.substring(offset); |
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| 169 | return result; |
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| 170 | } |
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| 171 | |
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| 172 | for (int i = length; i > 0; i--) { |
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| 173 | if (Character.isWhitespace(description.charAt(offset + i))) { |
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| 174 | length = i; |
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| 175 | i = 0; |
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| 176 | } |
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| 177 | } |
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| 178 | |
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| 179 | result += description.substring(offset, offset + length) + "\n"; |
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| 180 | offset += length + 1; |
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| 181 | } |
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| 182 | return result; |
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| 183 | } |
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| 184 | } |
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