StyledTextCompFind.java

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 *
 * Pentaho Data Integration
 *
 * Copyright (C) 2002-2016 by Pentaho : http://www.pentaho.com
 *
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 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
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package org.pentaho.di.ui.core.widget;

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.pentaho.di.core.util.Utils;
import org.pentaho.di.i18n.BaseMessages;
import org.pentaho.di.ui.core.gui.GUIResource;

public class StyledTextCompFind extends org.eclipse.swt.widgets.Dialog {
  private static Class<?> PKG = StyledTextCompFind.class; // for i18n purposes, needed by Translator2!!

  private Shell sShell = null;
  private Text searchText;
  private StyledText text;
  private String strHeader;

  private Button btnNext;
  private Button btnCancel;

  private Button btnIgnoreCase;
  private Button btnWrapSearch;
  private Button optForward;

  public StyledTextCompFind( Shell parent, StyledText text, String strHeader ) {
    super( parent );
    this.text = text;
    this.strHeader = strHeader;
  }

  public void open() {

    Shell parent = getParent();
    sShell = new Shell( parent, SWT.DIALOG_TRIM | SWT.NO_REDRAW_RESIZE | SWT.APPLICATION_MODAL );
    sShell.setImage( GUIResource.getInstance().getImageSpoon() );
    sShell.setText( strHeader );
    sShell.setSize( new Point( 360, 126 ) );
    FormLayout formLayout = new FormLayout();
    sShell.setLayout( formLayout );

    searchText = new Text( sShell, SWT.SINGLE | SWT.BORDER );
    FormData frmData = new FormData();
    frmData.left = new FormAttachment( 0, 70 );
    frmData.top = new FormAttachment( 12, 0 );
    frmData.width = 178;
    searchText.setLayoutData( frmData );

    Label lblFind = new Label( sShell, SWT.LEFT );
    lblFind.setText( BaseMessages.getString( PKG, "Widget.Styled.Comp.Find.Title" ) );
    frmData = new FormData();
    frmData.right = new FormAttachment( searchText, -8 );
    frmData.top = new FormAttachment( 12, 0 );
    lblFind.setLayoutData( frmData );

    btnNext = new Button( sShell, SWT.PUSH );
    btnNext.setText( BaseMessages.getString( PKG, "Widget.Styled.Comp.FindNext" ) );
    btnNext.setEnabled( false );
    frmData = new FormData();
    frmData.left = new FormAttachment( searchText, 7 );
    frmData.width = 81;
    frmData.height = 23;
    frmData.top = new FormAttachment( 9, 0 );
    btnNext.setLayoutData( frmData );

    btnCancel = new Button( sShell, SWT.PUSH );
    btnCancel.setText( BaseMessages.getString( PKG, "Widget.Styled.Comp.Close" ) );
    frmData = new FormData();
    frmData.left = new FormAttachment( searchText, 7 );
    frmData.width = 81;
    frmData.height = 23;
    frmData.top = new FormAttachment( btnNext, 6 );
    btnCancel.setLayoutData( frmData );

    btnIgnoreCase = new Button( sShell, SWT.CHECK );
    btnIgnoreCase.setText( BaseMessages.getString( PKG, "Widget.Styled.Comp.CaseSensitive" ) );
    frmData = new FormData();
    frmData.left = new FormAttachment( 5, 0 );
    frmData.top = new FormAttachment( 54, 0 );
    btnIgnoreCase.setLayoutData( frmData );

    btnWrapSearch = new Button( sShell, SWT.CHECK );
    btnWrapSearch.setText( BaseMessages.getString( PKG, "Widget.Styled.Comp.WrapSearch" ) );
    frmData = new FormData();
    frmData.left = new FormAttachment( 5, 0 );
    frmData.top = new FormAttachment( 70, 0 );
    btnWrapSearch.setLayoutData( frmData );

    Group grpDir = new Group( sShell, SWT.SHADOW_IN );
    grpDir.setText( BaseMessages.getString( PKG, "Widget.Styled.Comp.Direction" ) );

    optForward = new Button( grpDir, SWT.RADIO );
    optForward.setText( BaseMessages.getString( PKG, "Widget.Styled.Comp.Forward" ) );
    optForward.setBounds( 5, 15, 75, 15 );
    Button optBackward = new Button( grpDir, SWT.RADIO );
    optBackward.setBounds( 5, 33, 75, 15 );
    optForward.setSelection( true );
    optBackward.setText( BaseMessages.getString( PKG, "Widget.Styled.Comp.Backward" ) );

    frmData = new FormData();
    frmData.top = new FormAttachment( searchText, 8 );
    frmData.right = new FormAttachment( btnNext, -7 );
    frmData.bottom = new FormAttachment( 100, -10 );
    grpDir.setLayoutData( frmData );

    btnNext.addListener( SWT.Selection, new Listener() {
      public void handleEvent( Event e ) {
        if ( !findText() ) {
          MessageBox messageBox = new MessageBox( sShell, SWT.ICON_INFORMATION | SWT.OK );
          messageBox.setText( BaseMessages.getString( PKG, "Widget.Styled.Comp.FindItem" ) );
          messageBox.setMessage( BaseMessages.getString( PKG, "Widget.Styled.CompReplace.ItemNotFound", searchText
            .getText() ) );
          messageBox.open();
        }
      }
    } );

    btnCancel.addListener( SWT.Selection, new Listener() {
      public void handleEvent( Event e ) {
        sShell.dispose();
      }
    } );

    searchText.addModifyListener( new ModifyListener() {
      public void modifyText( ModifyEvent e ) {
        if ( searchText.getText() != null && searchText.getText().length() > 0 ) {
          btnNext.setEnabled( true );
        } else {
          btnNext.setEnabled( false );
        }
      }
    } );

    if ( text.getSelectionText() != null ) {
      String tt = text.getSelectionText();
      if ( tt.indexOf( '\n' ) < 0 ) {
        searchText.setText( text.getSelectionText() );
      }
    }
    setSearchText();
    sShell.open();
    Display display = parent.getDisplay();
    while ( !parent.isDisposed() && !sShell.isDisposed() && !text.isDisposed() ) {
      if ( !display.readAndDispatch() ) {
        display.sleep();
      }
    }
    sShell.dispose();

  }

  private void setSearchText() {
    if ( this.text != null && !Utils.isEmpty( this.text.getSelectionText() ) ) {
      searchText.setText( this.text.getSelectionText() );
    }
    searchText.setFocus();
  }

  private boolean findText() {
    String searchString = searchText.getText();
    String textString = text.getText();
    int offset = text.getCaretOffset();
    int start = -1;

    if ( !btnIgnoreCase.getSelection() ) {
      searchString = searchString.toLowerCase();
      textString = textString.toLowerCase();
    }

    if ( optForward.getSelection() ) {
      start = textString.indexOf( searchString, offset );
      if ( ( start < 0 ) && btnWrapSearch.getSelection() ) {
        start = textString.indexOf( searchString, 0 );
      }
    } else if ( text.getSelectionRange().y > searchString.length() ) {
      start = textString.lastIndexOf( searchString, offset - 1 );
      if ( ( start < 0 ) && btnWrapSearch.getSelection() ) {
        start = textString.lastIndexOf( searchString );
      }
    } else {
      start = textString.lastIndexOf( searchString, offset - text.getSelectionRange().y - 1 );
      if ( ( start < 0 ) && btnWrapSearch.getSelection() ) {
        start = textString.lastIndexOf( searchString );
      }
    }
    if ( start > -1 ) {
      text.setSelection( start, start + searchString.length() );
      return true;
    }
    return false;
  }
}