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   1 /*
   2  * $Id: EditElementWizardPage.java,v 1.2 2006-10-21 23:18:43 pombredanne Exp $
   3  * Copyright Narushima Hironori. All rights reserved.
   4  */
   5 package net.sourceforge.phpeclipse.wizards.html;
   6
   7 import java.io.IOException;
   8 import java.io.StringReader;
   9
  10 import javax.xml.parsers.DocumentBuilderFactory;
  11 import javax.xml.parsers.ParserConfigurationException;
  12
  13 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  14
  15 import org.eclipse.core.resources.IFile;
  16 import org.eclipse.core.runtime.CoreException;
  17 import org.eclipse.jface.text.BadLocationException;
  18 import org.eclipse.jface.text.IDocument;
  19 import org.eclipse.jface.text.ITextSelection;
  20 import org.eclipse.jface.text.TextSelection;
  21 import org.eclipse.jface.wizard.IWizard;
  22 import org.eclipse.jface.wizard.WizardPage;
  23 import org.eclipse.swt.SWT;
  24 import org.eclipse.swt.layout.GridData;
  25 import org.eclipse.swt.layout.GridLayout;
  26 import org.eclipse.swt.widgets.Composite;
  27 import org.eclipse.swt.widgets.Label;
  28 import org.eclipse.swt.widgets.Text;
  29 import org.w3c.dom.Document;
  30 import org.w3c.dom.Element;
  31 import org.xml.sax.InputSource;
  32 import org.xml.sax.SAXException;
  33
  34 /**
  35  *
  36  *
  37  */
  38 public abstract class EditElementWizardPage extends WizardPage implements
  39                 IPreviewer {
  40
  41         final public static int NEW = 0, MODIFY = 1;
  42
  43         private static DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory
  44                         .newInstance();
  45
  46         Composite extendComp;
  47
  48         Text preview;
  49
  50         private String elementName = null;
  51
  52         int editType = NEW;
  53
  54         protected EditElementWizardPage(String pageName) {
  55                 super(pageName);
  56         }
  57
  58         public void createControl(Composite parent) {
  59                 Composite base = new Composite(parent, SWT.NONE);
  60                 setControl(base);
  61                 base.setLayout(new GridLayout(1, false));
  62
  63                 // create child control.
  64                 Composite childControlBase = new Composite(base, SWT.NONE);
  65                 childControlBase.setLayoutData(new GridData(GridData.FILL_BOTH));
  66                 try {
  67                         createChildControl(childControlBase);
  68                 } catch (CoreException e) {
  69                         PHPeclipsePlugin.log(e);
  70                         return;
  71                 }
  72
  73                 // preview components.
  74                 Composite previewBase = new Composite(base, SWT.NONE);
  75
  76                 GridData gd = new GridData(GridData.FILL_HORIZONTAL);
  77                 previewBase.setLayoutData(gd);
  78                 previewBase.setLayout(new GridLayout(1, false));
  79
  80                 Label labe = new Label(previewBase, SWT.NONE);
  81                 labe.setText("Preview:");
  82                 gd = new GridData(GridData.FILL_HORIZONTAL);
  83                 labe.setLayoutData(gd);
  84
  85                 preview = new Text(previewBase, SWT.BORDER | SWT.MULTI | SWT.READ_ONLY
  86                                 | SWT.WRAP | SWT.V_SCROLL | SWT.H_SCROLL);
  87                 gd = new GridData(GridData.FILL_HORIZONTAL);
  88                 gd.widthHint = 0;
  89                 gd.heightHint = preview.getLineHeight() * 4;
  90                 preview.setLayoutData(gd);
  91
  92                 refreshPreview();
  93         }
  94
  95         abstract protected void createChildControl(Composite parent)
  96                         throws CoreException;
  97
  98         public abstract String getPreviewText();
  99
 100         public void refreshPreview() {
 101                 if (preview != null) {
 102                         String text = getPreviewText();
 103                         preview.setText(text == null ? "" : text);
 104                 }
 105         }
 106
 107         public String getElementName() {
 108                 return elementName;
 109         }
 110
 111         public void setElementName(String string) {
 112                 elementName = string;
 113         }
 114
 115         protected IFile getEditFile() {
 116                 IFile file = null;
 117                 IWizard wiz = getWizard();
 118                 if (wiz instanceof EditElementWizard) {
 119                         file = ((EditElementWizard) wiz).getCurrentEditFile();
 120                 }
 121                 return file;
 122         }
 123
 124         protected void performFinish() {
 125                 EditElementWizard wiz = (EditElementWizard) getWizard();
 126                 ITextSelection sel = wiz.getSelection();
 127                 IDocument doc = wiz.getDocument();
 128                 int offset = sel.getOffset();
 129                 try {
 130                         doc.replace(offset, sel.getLength(), getPreviewText());
 131                 } catch (BadLocationException e) {
 132                         PHPeclipsePlugin.log(e);
 133                 }
 134                 int index = doc.get().indexOf('>', offset);
 135                 if (index != -1) {
 136                         wiz.setSelection(new TextSelection(index + 1, 0));
 137                 }
 138         }
 139
 140         /**
 141          * Returns edit type.
 142          */
 143         public int getEditType() {
 144                 return editType;
 145         }
 146
 147         /**
 148          * Sets edit type that types are EditElementWizardPage.NEW,
 149          * EditElementWizardPage.MODIFY. Default value is NEW.
 150          */
 151         public void setEditType(int i) {
 152                 editType = i;
 153         }
 154
 155         protected String getSelectionText() {
 156                 return ((EditElementWizard) getWizard()).getSelection().getText();
 157         }
 158
 159         protected Element getParsedSelectionText() {
 160                 String selText = getSelectionText();
 161                 try {
 162                         InputSource source = new InputSource(new StringReader(selText));
 163                         Document doc = docBuilderFactory.newDocumentBuilder().parse(source);
 164                         return doc.getDocumentElement();
 165                 } catch (SAXException e) {
 166                 } catch (IOException e) {
 167                 } catch (ParserConfigurationException e) {
 168                 }
 169                 return null;
 170
 171         }
 172
 173         protected static String chooseContent(String text) {
 174                 int b = -1, e = -1, len = text.length();
 175                 for (int i = 0; i < len; i++) {
 176                         if (text.charAt(i) == '>') {
 177                                 b = i + 1;
 178                                 break;
 179                         }
 180                 }
 181                 for (int i = len - 1; i >= 0; i--) {
 182                         if (text.charAt(i) == '<') {
 183                                 e = i;
 184                                 break;
 185                         }
 186                 }
 187                 return (b != -1 && e != -1 && b < len && e < len) ? text
 188                                 .substring(b, e) : "";
 189
 190         }
 191
 192 }