/*******************************************************************************
* Copyright (c) 2000, 2011 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.widgets;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.motif.*;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.events.*;
/**
* Instances of this class are selectable user interface
* objects that allow the user to enter and modify text.
* Text controls can be either single or multi-line.
* When a text control is created with a border, the
* operating system includes a platform specific inset
* around the contents of the control. When created
* without a border, an effort is made to remove the
* inset such that the preferred size of the control
* is the same size as the contents.
* <p>
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>CENTER, ICON_CANCEL, ICON_SEARCH, LEFT, MULTI, PASSWORD, SEARCH, SINGLE, RIGHT, READ_ONLY, WRAP</dd>
* <dt><b>Events:</b></dt>
* <dd>DefaultSelection, Modify, Verify, OrientationChange</dd>
* </dl>
* <p>
* Note: Only one of the styles MULTI and SINGLE may be specified,
* and only one of the styles LEFT, CENTER, and RIGHT may be specified.
* </p>
* <p>
* Note: The styles ICON_CANCEL and ICON_SEARCH are hints used in combination with SEARCH.
* When the platform supports the hint, the text control shows these icons. When an icon
* is selected, a default selection event is sent with the detail field set to one of
* ICON_CANCEL or ICON_SEARCH. Normally, application code does not need to check the
* detail. In the case of ICON_CANCEL, the text is cleared before the default selection
* event is sent causing the application to search for an empty string.
* </p>
* <p>
* IMPORTANT: This class is <em>not</em> intended to be subclassed.
* </p>
*
* @see <a href="http://www.eclipse.org/swt/snippets/#text">Text snippets</a>
* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
* @noextend This class is not intended to be subclassed by clients.
*/
public class Text extends Scrollable {
char echoCharacter;
boolean ignoreChange;
char [] hiddenText;
String message;
int drawCount;
Color disabledColor;
static final boolean IsGB18030;
/**
* The maximum number of characters that can be entered
* into a text widget.
* <p>
* Note that this value is platform dependent, based upon
* the native widget implementation.
* </p>
*/
public static final int LIMIT;
/**
* The delimiter used by multi-line text widgets. When text
* is queried and from the widget, it will be delimited using
* this delimiter.
*/
public static final String DELIMITER;
static final RGB MSG_FOREGROUND = new RGB (172, 168, 153);
/*
* These values can be different on different platforms.
* Therefore they are not initialized in the declaration
* to stop the compiler from inlining.
*/
static {
LIMIT = 0x7FFFFFFF;
DELIMITER = "\n";
IsGB18030 = Converter.defaultCodePage ().endsWith ("18030");
}
/**
* Constructs a new instance of this class given its parent
* and a style value describing its behavior and appearance.
* <p>
* The style value is either one of the style constants defined in
* class <code>SWT</code> which is applicable to instances of this
* class, or must be built by <em>bitwise OR</em>'ing together
* (that is, using the <code>int</code> "|" operator) two or more
* of those <code>SWT</code> style constants. The class description
* lists the style constants that are applicable to the class.
* Style bits are also inherited from superclasses.
* </p>
*
* @param parent a composite control which will be the parent of the new instance (cannot be null)
* @param style the style of control to construct
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
* </ul>
*
* @see SWT#SINGLE
* @see SWT#MULTI
* @see SWT#READ_ONLY
* @see SWT#WRAP
* @see SWT#LEFT
* @see SWT#RIGHT
* @see SWT#CENTER
* @see SWT#PASSWORD
* @see SWT#SEARCH
* @see SWT#ICON_SEARCH
* @see SWT#ICON_CANCEL
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public Text (Composite parent, int style) {
super (parent, checkStyle (style));
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the receiver's text is modified, by sending
* it one of the messages defined in the <code>ModifyListener</code>
* interface.
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see ModifyListener
* @see #removeModifyListener
*/
public void addModifyListener (ModifyListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.Modify, typedListener);
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the control is selected by the user, by sending
* it one of the messages defined in the <code>SelectionListener</code>
* interface.
* <p>
* <code>widgetSelected</code> is not called for texts.
* <code>widgetDefaultSelected</code> is typically called when ENTER is pressed in a single-line text,
* or when ENTER is pressed in a search text. If the receiver has the <code>SWT.SEARCH | SWT.CANCEL</code> style
* and the user cancels the search, the event object detail field contains the value <code>SWT.CANCEL</code>.
* </p>
*
* @param listener the listener which should be notified when the control is selected by the user
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see SelectionListener
* @see #removeSelectionListener
* @see SelectionEvent
*/
public void addSelectionListener(SelectionListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener(listener);
addListener(SWT.Selection,typedListener);
addListener(SWT.DefaultSelection,typedListener);
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the receiver's text is verified, by sending
* it one of the messages defined in the <code>VerifyListener</code>
* interface.
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see VerifyListener
* @see #removeVerifyListener
*/
public void addVerifyListener (VerifyListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.Verify, typedListener);
}
/**
* Appends a string.
* <p>
* The new text is appended to the text at
* the end of the widget.
* </p>
*
* @param string the string to be appended
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void append (String string) {
checkWidget();
if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
int position = OS.XmTextGetLastPosition (handle);
byte [] buffer = Converter.wcsToMbcs (getCodePage (), string, true);
boolean warnings = display.getWarnings ();
display.setWarnings (false);
OS.XmTextSetInsertionPosition (handle, position);
OS.XmTextInsert (handle, position, buffer);
position = OS.XmTextGetLastPosition (handle);
OS.XmTextSetInsertionPosition (handle, position);
display.setWarnings(warnings);
}
static int checkStyle (int style) {
if ((style & SWT.SEARCH) != 0) {
style |= SWT.SINGLE | SWT.BORDER;
style &= ~SWT.PASSWORD;
/*
* NOTE: ICON_CANCEL has the same value as H_SCROLL and
* ICON_SEARCH has the same value as V_SCROLL so they are
* cleared because SWT.SINGLE is set.
*/
}
if ((style & SWT.SINGLE) != 0 && (style & SWT.MULTI) != 0) {
style &= ~SWT.MULTI;
}
style = checkBits (style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0);
if ((style & SWT.SINGLE) != 0) style &= ~(SWT.H_SCROLL | SWT.V_SCROLL | SWT.WRAP);
if ((style & SWT.WRAP) != 0) {
style |= SWT.MULTI;
style &= ~SWT.H_SCROLL;
}
if ((style & SWT.MULTI) != 0) style &= ~SWT.PASSWORD;
if ((style & (SWT.SINGLE | SWT.MULTI)) != 0) return style;
if ((style & (SWT.H_SCROLL | SWT.V_SCROLL)) != 0) return style | SWT.MULTI;
return style | SWT.SINGLE;
}
/**
* Clears the selection.
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void clearSelection () {
checkWidget();
int xDisplay = OS.XtDisplay (handle);
if (xDisplay == 0) return;
OS.XmTextClearSelection (handle, OS.XtLastTimestampProcessed (xDisplay));
}
public Point computeSize (int wHint, int hHint, boolean changed) {
checkWidget();
int width = wHint;
int height = hHint;
if (wHint == SWT.DEFAULT || hHint == SWT.DEFAULT) {
int ptr = OS.XmTextGetString (handle);
if (ptr == 0) return new Point (0, 0);
int size = OS.strlen (ptr);
if (size == 0) {
if (hHint == SWT.DEFAULT) {
if ((style & SWT.SINGLE) != 0) {
height = getLineHeight ();
} else {
height = DEFAULT_HEIGHT;
}
}
if (wHint == SWT.DEFAULT) {
width = DEFAULT_WIDTH;
}
} else {
byte [] buffer = new byte [size + 1];
OS.memmove (buffer, ptr, size);
boolean wrap = (style & SWT.MULTI) != 0 && (style & SWT.WRAP) != 0;
if (wrap && wHint != SWT.DEFAULT) {
char[] chars = Converter.mbcsToWcs (getCodePage (), buffer);
String text = new String (chars);
String wrapped = display.wrapText (text, font, wHint);
buffer = Converter.wcsToMbcs (getCodePage (), wrapped, true);
}
int xmString;
if ((style & SWT.SINGLE) != 0) {
xmString = OS.XmStringParseText (
buffer,
0,
OS.XmFONTLIST_DEFAULT_TAG,
OS.XmCHARSET_TEXT,
null,
0,
0);
} else {
xmString = OS.XmStringGenerate (
buffer,
OS.XmFONTLIST_DEFAULT_TAG,
OS.XmCHARSET_TEXT,
null);
}
int fontList = font.handle;
if (hHint == SWT.DEFAULT) {
if ((style & SWT.SINGLE) != 0) {
height = getLineHeight ();
} else {
height = OS.XmStringHeight (fontList, xmString);
}
}
if (wHint == SWT.DEFAULT) width = OS.XmStringWidth (fontList, xmString);
OS.XmStringFree (xmString);
}
OS.XtFree (ptr);
if ((style & SWT.SINGLE) != 0 && message.length () > 0) {
if (wHint == SWT.DEFAULT) {
byte [] buffer = Converter.wcsToMbcs (getCodePage (), message, true);
int xmString = OS.XmStringGenerate (
buffer,
OS.XmFONTLIST_DEFAULT_TAG,
OS.XmCHARSET_TEXT,
null);
int fontList = font.handle;
width = Math.max (width, OS.XmStringWidth (fontList, xmString));
OS.XmStringFree (xmString);
}
}
}
Rectangle trim = computeTrim (0, 0, width, height);
return new Point (trim.width, trim.height);
}
public Rectangle computeTrim (int x, int y, int width, int height) {
checkWidget();
if (horizontalBar != null) {
int [] argList1 = {OS.XmNheight, 0};
OS.XtGetValues (horizontalBar.handle, argList1, argList1.length / 2);
height += argList1 [1] + 4;
}
if (verticalBar != null) {
int [] argList1 = {OS.XmNwidth, 0};
OS.XtGetValues (verticalBar.handle, argList1, argList1.length / 2);
width += argList1 [1] + 4;
}
if ((style & SWT.MULTI) != 0) height+=4;
XRectangle rect = new XRectangle ();
OS.XmWidgetGetDisplayRect (handle, rect);
x -= rect.x;
y -= rect.y;
width += rect.x * 2;
height += rect.y * 2;
int shadow = 0, highlight = 0;
if ((style & SWT.MULTI) != 0 || (style & SWT.BORDER) != 0) {
int [] argList = new int [] {
OS.XmNshadowThickness, 0,
OS.XmNhighlightThickness, 0,
};
OS.XtGetValues (handle, argList, argList.length / 2);
shadow = argList [1];
highlight = argList [3];
}
x -= shadow + highlight;
y -= shadow + highlight;
width += (shadow + highlight) * 2;
height += (shadow + highlight) * 2;
return new Rectangle (x, y, width, height);
}
/**
* Copies the selected text.
* <p>
* The current selection is copied to the clipboard.
* </p>
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void copy () {
checkWidget();
int xDisplay = OS.XtDisplay (handle);
if (xDisplay == 0) return;
OS.XmTextCopy (handle, OS.XtLastTimestampProcessed (xDisplay));
}
void createHandle (int index) {
int [] argList1 = {
OS.XmNverifyBell, 0,
OS.XmNeditMode, (style & SWT.SINGLE) != 0 ? OS.XmSINGLE_LINE_EDIT : OS.XmMULTI_LINE_EDIT,
OS.XmNscrollHorizontal, (style & SWT.H_SCROLL) != 0 ? 1 : 0,
OS.XmNscrollVertical, (style & SWT.V_SCROLL) != 0 ? 1 : 0,
OS.XmNwordWrap, !IsGB18030 && (style & SWT.WRAP) != 0 ? 1: 0,
OS.XmNeditable, (style & SWT.READ_ONLY) != 0 ? 0 : 1,
OS.XmNcursorPositionVisible, (style & SWT.READ_ONLY) != 0 ? 0 : 1,
// OS.XmNmarginWidth, 3,
// OS.XmNmarginHeight, 1,
OS.XmNancestorSensitive, 1,
};
int parentHandle = parent.handle;
if ((style & SWT.SINGLE) != 0) {
handle = OS.XmCreateTextField (parentHandle, null, argList1, argList1.length / 2);
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
int [] argList2 = new int [] {OS.XmNcursorPositionVisible, 0};
OS.XtSetValues (handle, argList2, argList2.length / 2);
} else {
handle = OS.XmCreateScrolledText (parentHandle, new byte [1], argList1, argList1.length / 2);
if (handle == 0) error (SWT.ERROR_NO_HANDLES);
scrolledHandle = OS.XtParent (handle);
}
if ((style & SWT.BORDER) == 0) {
int [] argList3 = new int [] {
/*
* Bug in Motif. Setting the margin width to zero for
* a single line text field causes the field to draw
* garbage when the caret is placed at the start of
* the widget. The fix is to not set the margin width.
*/
// OS.XmNmarginWidth, 0,
OS.XmNmarginHeight, 0,
OS.XmNshadowThickness, 0,
};
OS.XtSetValues (handle, argList3, argList3.length / 2);
}
/*
* Feature in Motif. The Text widget is created with a default
* drop target. This is inconsistent with other platforms.
* To be consistent, disable the default drop target.
*/
OS.XmDropSiteUnregister (handle);
}
ScrollBar createScrollBar (int type) {
return createStandardBar (type);
}
void createWidget (int index) {
super.createWidget (index);
hiddenText = new char [0];
message = "";
if ((style & SWT.PASSWORD) != 0) setEchoChar ('*');
if ((style & SWT.SINGLE) != 0) {
disabledColor = new Color (display, MSG_FOREGROUND);
}
}
/**
* Cuts the selected text.
* <p>
* The current selection is first copied to the
* clipboard and then deleted from the widget.
* </p>
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void cut () {
checkWidget();
int xDisplay = OS.XtDisplay (handle);
if (xDisplay == 0) return;
OS.XmTextCut (handle, OS.XtLastTimestampProcessed (xDisplay));
}
int defaultBackground () {
return display.textBackground;
}
Font defaultFont () {
return display.textFont;
}
int defaultForeground () {
return display.textForeground;
}
boolean dragDetect (int x, int y, boolean filter, boolean [] consume) {
if (filter) {
int [] start = new int [1], end = new int [1];
OS.XmTextGetSelectionPosition (handle, start, end);
if (start [0] != end [0]) {
int pos = OS.XmTextXYToPos(handle, (short) x, (short) y);
if (start [0] <= pos && pos < end [0]) {
if (super.dragDetect (x, y, filter, consume)) {
if (consume != null) consume [0] = true;
return true;
}
}
}
return false;
}
return super.dragDetect (x, y, filter, consume);
}
/**
* Returns the line number of the caret.
* <p>
* The line number of the caret is returned.
* </p>
*
* @return the line number
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getCaretLineNumber () {
checkWidget();
return getLineNumber (OS.XmTextGetInsertionPosition (handle));
}
/**
* Returns a point describing the receiver's location relative
* to its parent (or its display if its parent is null).
* <p>
* The location of the caret is returned.
* </p>
*
* @return a point, the location of the caret
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public Point getCaretLocation () {
checkWidget();
int position;
position = OS.XmTextGetInsertionPosition (handle);
short [] x = new short [1], y = new short [1];
OS.XmTextPosToXY (handle, position, x, y);
return new Point (x [0], y [0] - getFontAscent (font.handle));
}
/**
* Returns the character position of the caret.
* <p>
* Indexing is zero based.
* </p>
*
* @return the position of the caret
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getCaretPosition () {
checkWidget();
return OS.XmTextGetInsertionPosition (handle);
}
/**
* Returns the number of characters.
*
* @return number of characters in the widget
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getCharCount () {
checkWidget();
return OS.XmTextGetLastPosition (handle);
}
/**
* Returns the double click enabled flag.
* <p>
* The double click flag enables or disables the
* default action of the text widget when the user
* double clicks.
* </p>
*
* @return whether or not double click is enabled
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public boolean getDoubleClickEnabled () {
checkWidget();
int [] argList = {OS.XmNselectionArrayCount, 0};
OS.XtGetValues (handle, argList, argList.length / 2);
return argList [1] != 1;
}
/**
* Returns the echo character.
* <p>
* The echo character is the character that is
* displayed when the user enters text or the
* text is changed by the programmer.
* </p>
*
* @return the echo character
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see #setEchoChar
*/
public char getEchoChar () {
checkWidget();
return echoCharacter;
}
/**
* Returns the editable state.
*
* @return whether or not the receiver is editable
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public boolean getEditable () {
checkWidget();
/*
* Bug in MOTIF. For some reason, when XmTextGetEditable () is called
* from inside an XmNvalueChangedCallback or XmNModifyVerifyCallback,
* it always returns TRUE. Calls to XmTextGetEditable () outside of
* these callbacks return the correct value. The fix is to query the
* resource directly instead of using the convenience function.
*/
int [] argList = {OS.XmNeditable, 0};
OS.XtGetValues (handle, argList, argList.length / 2);
return argList [1] != 0;
}
/**
* Returns the number of lines.
*
* @return the number of lines in the widget
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getLineCount () {
checkWidget();
if ((style & SWT.SINGLE) != 0) return 1;
int lastChar = echoCharacter != '\0' ? hiddenText.length : OS.XmTextGetLastPosition (handle);
return getLineNumber (lastChar) + 1;
}
/**
* Returns the line delimiter.
*
* @return a string that is the line delimiter
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see #DELIMITER
*/
public String getLineDelimiter () {
checkWidget();
return "\n";
}
/**
* Returns the height of a line.
*
* @return the height of a row of text
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getLineHeight () {
checkWidget();
return getFontHeight (font.handle);
}
int getLineNumber (int position) {
if (position == 0) return 0;
int count = 0, start = 0, page = 1024;
char [] buffer = new char [page + 1];
/*
* Bug in Linux. For some reason, XmTextGetSubstringWcs () does
* not copy wchar_t characters into the buffer. Instead, it
* copies 4 bytes per character. This does not happen on other
* platforms such as AIX. The fix is to call XmTextGetSubstring ()
* instead on Linux and rely on the fact that Metrolink Motif 1.2
* does not support multibyte locales.
*/
byte [] buffer1 = null;
if (OS.IsLinux) buffer1 = new byte [page + 1];
int end = ((position + page - 1) / page) * page;
while (start < end) {
int length = page;
if (start + page > position) length = position - start;
if (echoCharacter != '\0') {
System.arraycopy (hiddenText, start, buffer, 0, length);
} else {
if (OS.IsLinux) {
OS.XmTextGetSubstring (handle, start, length, buffer1.length, buffer1);
for (int i=0; i<length; i++) buffer [i] = (char) buffer1 [i];
} else {
OS.XmTextGetSubstringWcs (handle, start, length, buffer.length, buffer);
}
}
for (int i=0; i<length; i++) {
if (buffer [i] == '\n') count++;
}
start += page;
}
return count;
}
/**
* Returns the widget message. The message text is displayed
* as a hint for the user, indicating the purpose of the field.
* <p>
* Typically this is used in conjunction with <code>SWT.SEARCH</code>.
* </p>
*
* @return the widget message
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.3
*/
public String getMessage () {
checkWidget ();
return message;
}
int getNavigationType () {
/*
* Bug in Motif. On Solaris only, the implementation
* of XtGetValues for XmText does not check for a zero
* pointer in the arg list and GP's. The fix is to
* allocate and free memory for the arg list value.
*/
if ((style & SWT.SINGLE) != 0) {
return super.getNavigationType ();
}
int ptr = OS.XtMalloc (4);
if (ptr == 0) return OS.XmNONE;
int [] argList = {OS.XmNnavigationType, ptr};
OS.XtGetValues (handle, argList, argList.length / 2);
int [] buffer = new int [1];
OS.memmove (buffer, ptr, 4);
OS.XtFree (ptr);
return buffer [0];
}
/**
* Returns the orientation of the receiver, which will be one of the
* constants <code>SWT.LEFT_TO_RIGHT</code> or <code>SWT.RIGHT_TO_LEFT</code>.
*
* @return the orientation style
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 2.1.2
*/
public int getOrientation () {
checkWidget();
return style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT);
}
/*public*/ int getPosition (Point point) {
checkWidget ();
if (point == null) error (SWT.ERROR_NULL_ARGUMENT);
return OS.XmTextXYToPos(handle, (short) point.x, (short) point.y);
}
/**
* Returns a <code>Point</code> whose x coordinate is the
* character position representing the start of the selected
* text, and whose y coordinate is the character position
* representing the end of the selection. An "empty" selection
* is indicated by the x and y coordinates having the same value.
* <p>
* Indexing is zero based. The range of a selection is from
* 0..N where N is the number of characters in the widget.
* </p>
*
* @return a point representing the selection start and end
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public Point getSelection () {
checkWidget();
int [] start = new int [1], end = new int [1];
OS.XmTextGetSelectionPosition (handle, start, end);
if (start [0] == end [0]) {
start [0] = end [0] = OS.XmTextGetInsertionPosition (handle);
}
return new Point (start [0], end [0]);
}
/**
* Returns the number of selected characters.
*
* @return the number of selected characters.
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getSelectionCount () {
checkWidget();
int [] start = new int [1], end = new int [1];
OS.XmTextGetSelectionPosition (handle, start, end);
return end [0] - start [0];
}
/**
* Gets the selected text, or an empty string if there is no current selection.
*
* @return the selected text
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public String getSelectionText () {
checkWidget();
if (echoCharacter != '\0') {
Point selection = getSelection ();
return getText (selection.x, selection.y);
}
int ptr = OS.XmTextGetSelection (handle);
if (ptr == 0) return "";
int length = OS.strlen (ptr);
byte [] buffer = new byte [length];
OS.memmove (buffer, ptr, length);
OS.XtFree (ptr);
return new String (Converter.mbcsToWcs (getCodePage (), buffer));
}
/**
* Returns the number of tabs.
* <p>
* Tab stop spacing is specified in terms of the
* space (' ') character. The width of a single
* tab stop is the pixel width of the spaces.
* </p>
*
* @return the number of tab characters
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getTabs () {
checkWidget();
/* Tabs are not supported in MOTIF. */
return 8;
}
/**
* Returns the widget text.
* <p>
* The text for a text widget is the characters in the widget, or
* an empty string if this has never been set.
* </p>
*
* @return the widget text
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public String getText () {
return new String (getTextChars());
}
/**
* Returns a range of text. Returns an empty string if the
* start of the range is greater than the end.
* <p>
* Indexing is zero based. The range of
* a selection is from 0..N-1 where N is
* the number of characters in the widget.
* </p>
*
* @param start the start of the range
* @param end the end of the range
* @return the range of text
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public String getText (int start, int end) {
checkWidget();
if (!(start <= end && 0 <= end)) return "";
boolean hasEcho = echoCharacter != '\0';
int length = hasEcho ? hiddenText.length : OS.XmTextGetLastPosition (handle);
if (length == 0) return "";
end = Math.min (end, length - 1);
if (start > end) return "";
start = Math.max (0, start);
int numChars = end - start + 1;
if (hasEcho) return new String(hiddenText, start, numChars);
int bufLength = numChars * OS.MB_CUR_MAX () + 1;
byte [] buffer = new byte [bufLength];
int code = OS.XmTextGetSubstring (handle, start, numChars, bufLength, buffer);
switch (code) {
case OS.XmCOPY_FAILED:
case OS.XmCOPY_TRUNCATED:
error (SWT.ERROR_CANNOT_GET_TEXT);
}
char [] unicode = Converter.mbcsToWcs (getCodePage (), buffer);
return new String (unicode, 0, numChars);
}
/**
* Returns the widget's text as a character array.
* <p>
* The text for a text widget is the characters in the widget, or
* a zero-length array if this has never been set.
* </p>
*
* @return a character array that contains the widget's text
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see #setTextChars(char[])
*
* @since 3.7
*/
public char [] getTextChars () {
checkWidget();
if (echoCharacter != '\0') {
char [] text = new char [hiddenText.length];
System.arraycopy(hiddenText, 0, text, 0, text.length);
return text;
}
int ptr = OS.XmTextGetString (handle);
if (ptr == 0) return new char [0];
int length = OS.strlen (ptr);
byte [] buffer = new byte [length];
OS.memmove (buffer, ptr, length);
OS.XtFree (ptr);
return Converter.mbcsToWcs (getCodePage (), buffer);
}
/**
* Returns the maximum number of characters that the receiver is capable of holding.
* <p>
* If this has not been changed by <code>setTextLimit()</code>,
* it will be the constant <code>Text.LIMIT</code>.
* </p>
*
* @return the text limit
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see #LIMIT
*/
public int getTextLimit () {
checkWidget();
return OS.XmTextGetMaxLength (handle);
}
/**
* Returns the zero-relative index of the line which is currently
* at the top of the receiver.
* <p>
* This index can change when lines are scrolled or new lines are added or removed.
* </p>
*
* @return the index of the top line
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getTopIndex () {
checkWidget();
if ((style & SWT.SINGLE) != 0) return 0;
if (scrolledHandle == 0) return 0;
int [] argList1 = {OS.XmNverticalScrollBar, 0};
OS.XtGetValues (scrolledHandle, argList1, argList1.length / 2);
if (argList1 [1] == 0) return 0;
int [] argList2 = {OS.XmNvalue, 0};
OS.XtGetValues (argList1 [1], argList2, argList2.length / 2);
return argList2 [1];
}
/**
* Returns the top pixel.
* <p>
* The top pixel is the pixel position of the line
* that is currently at the top of the widget. On
* some platforms, a text widget can be scrolled by
* pixels instead of lines so that a partial line
* is displayed at the top of the widget.
* </p><p>
* The top pixel changes when the widget is scrolled.
* The top pixel does not include the widget trimming.
* </p>
*
* @return the pixel position of the top line
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getTopPixel () {
checkWidget();
return getTopIndex () * getLineHeight ();
}
boolean hasIMSupport() {
return true;
}
void hookEvents () {
super.hookEvents ();
int windowProc = display.windowProc;
OS.XtAddCallback (handle, OS.XmNactivateCallback, windowProc, ACTIVATE_CALLBACK);
OS.XtAddCallback (handle, OS.XmNvalueChangedCallback, windowProc, VALUE_CHANGED_CALLBACK);
OS.XtAddCallback (handle, OS.XmNmodifyVerifyCallback, windowProc, MODIFY_VERIFY_CALLBACK);
}
int inputContext () {
/* Answer zero. The text widget uses the default MOTIF input context. */
return 0;
}
/**
* Inserts a string.
* <p>
* The old selection is replaced with the new text.
* </p>
*
* @param string the string
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is <code>null</code></li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void insert (String string) {
checkWidget();
if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
int [] start = new int [1], end = new int [1];
OS.XmTextGetSelectionPosition (handle, start, end);
if (start [0] == end [0]) {
start [0] = end [0] = OS.XmTextGetInsertionPosition (handle);
}
byte [] buffer = Converter.wcsToMbcs (getCodePage (), string, true);
boolean warnings = display.getWarnings ();
display.setWarnings (false);
OS.XmTextReplace (handle, start [0], end [0], buffer);
int position = start [0] + Math.max (0, buffer.length - 1);
OS.XmTextSetInsertionPosition (handle, position);
display.setWarnings (warnings);
}
void overrideTranslations () {
if ((style & SWT.SINGLE) != 0) {
OS.XtOverrideTranslations (handle, display.tabTranslations);
}
}
/**
* Pastes text from clipboard.
* <p>
* The selected text is deleted from the widget
* and new text inserted from the clipboard.
* </p>
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void paste () {
checkWidget();
boolean warnings = display.getWarnings ();
display.setWarnings (false);
/*
* Bug in Motif. Despite the fact that the documentation
* claims that XmText functions work for XmTextFields, when
* a text field is passed to XmTextPaste, Motif segment faults.
* The fix is to call XmTextFieldPaste instead.
*/
if ((style & SWT.SINGLE) != 0) {
OS.XmTextFieldPaste (handle);
} else {
OS.XmTextPaste (handle);
}
display.setWarnings (warnings);
}
void releaseWidget () {
super.releaseWidget ();
hiddenText = null;
message = null;
if (disabledColor != null) disabledColor.dispose ();
disabledColor = null;
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the receiver's text is modified.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see ModifyListener
* @see #addModifyListener
*/
public void removeModifyListener (ModifyListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.Modify, listener);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the control is selected by the user.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see SelectionListener
* @see #addSelectionListener
*/
public void removeSelectionListener(SelectionListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook(SWT.Selection, listener);
eventTable.unhook(SWT.DefaultSelection,listener);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the control is verified.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see VerifyListener
* @see #addVerifyListener
*/
public void removeVerifyListener (VerifyListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.Verify, listener);
}
boolean sendIMKeyEvent (int type, XKeyEvent xEvent) {
return super.sendIMKeyEvent (type, xEvent, handle);
}
/**
* Selects all the text in the receiver.
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void selectAll () {
checkWidget();
/* Clear the highlight before setting the selection. */
int position = OS.XmTextGetLastPosition (handle);
// OS.XmTextSetHighlight (handle, 0, position, OS.XmHIGHLIGHT_NORMAL);
/*
* Bug in MOTIF. XmTextSetSelection () fails to set the
* selection when the receiver is not realized. The fix
* is to force the receiver to be realized by forcing the
* shell to be realized. If the receiver is realized before
* the shell, MOTIF fails to draw the text widget and issues
* lots of X BadDrawable errors.
*/
if (!OS.XtIsRealized (handle)) getShell ().realizeWidget ();
/* Set the selection. */
int xDisplay = OS.XtDisplay (handle);
if (xDisplay == 0) return;
boolean warnings = display.getWarnings ();
display.setWarnings (false);
OS.XmTextSetSelection (handle, 0, position, OS.XtLastTimestampProcessed (xDisplay));
/* Force the i-beam to follow the highlight/selection. */
OS.XmTextSetInsertionPosition (handle, 0);
display.setWarnings (warnings);
}
boolean setBounds (int x, int y, int width, int height, boolean move, boolean resize) {
/*
* Bug in Motif. For some reason an Xm warning is
* output whenever a Text widget's caret is beyond
* the visible region during a resize. The fix is
* to temporarily turn off warnings below.
*/
boolean warnings = display.getWarnings ();
display.setWarnings (false);
boolean changed = super.setBounds (x, y, width, height, move, resize);
display.setWarnings(warnings);
return changed;
}
/**
* Sets the double click enabled flag.
* <p>
* The double click flag enables or disables the
* default action of the text widget when the user
* double clicks.
* </p><p>
* Note: This operation is a hint and is not supported on
* platforms that do not have this concept.
* </p>
*
* @param doubleClick the new double click flag
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setDoubleClickEnabled (boolean doubleClick) {
checkWidget();
int [] argList = {OS.XmNselectionArrayCount, doubleClick ? 4 : 1};
OS.XtSetValues (handle, argList, argList.length / 2);
}
/**
* Sets the echo character.
* <p>
* The echo character is the character that is
* displayed when the user enters text or the
* text is changed by the programmer. Setting
* the echo character to '\0' clears the echo
* character and redraws the original text.
* If for any reason the echo character is invalid,
* or if the platform does not allow modification
* of the echo character, the default echo character
* for the platform is used.
* </p>
*
* @param echo the new echo character
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setEchoChar (char echo) {
checkWidget();
if ((style & SWT.MULTI) != 0) return;
if (echoCharacter == echo) return;
char [] newText;
if (echo == 0) {
newText = hiddenText;
hiddenText = new char [0];
} else {
newText = hiddenText = getTextChars ();
}
echoCharacter = echo;
Point selection = getSelection();
boolean oldValue = ignoreChange;
ignoreChange = true;
setTextChars(newText);
setSelection(selection);
ignoreChange = oldValue;
}
/**
* Sets the editable state.
*
* @param editable the new editable state
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setEditable (boolean editable) {
checkWidget();
OS.XmTextSetEditable (handle, editable);
style &= ~SWT.READ_ONLY;
if (!editable) style |= SWT.READ_ONLY;
if ((style & SWT.MULTI) != 0) return;
int [] argList = {OS.XmNcursorPositionVisible, editable && hasFocus () ? 1 : 0};
OS.XtSetValues (handle, argList, argList.length / 2);
}
/**
* Sets the widget message. The message text is displayed
* as a hint for the user, indicating the purpose of the field.
* <p>
* Typically this is used in conjunction with <code>SWT.SEARCH</code>.
* </p>
*
* @param message the new message
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the message is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.3
*/
public void setMessage (String message) {
checkWidget ();
if (message == null) error (SWT.ERROR_NULL_ARGUMENT);
this.message = message;
redrawHandle (0, 0, 0, 0, true, handle);
}
/**
* Sets the orientation of the receiver, which must be one
* of the constants <code>SWT.LEFT_TO_RIGHT</code> or <code>SWT.RIGHT_TO_LEFT</code>.
* <p>
* Note: This operation is a hint and is not supported on
* platforms that do not have this concept.
* </p>
*
* @param orientation new orientation style
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 2.1.2
*/
public void setOrientation (int orientation) {
checkWidget();
}
public void setRedraw (boolean redraw) {
checkWidget();
if ((style & SWT.SINGLE) != 0) return;
if (redraw) {
if (--drawCount == 0) OS.XmTextEnableRedisplay(handle);
} else {
if (drawCount++ == 0) OS.XmTextDisableRedisplay(handle);
}
}
/**
* Sets the selection.
* <p>
* Indexing is zero based. The range of
* a selection is from 0..N where N is
* the number of characters in the widget.
* </p><p>
* Text selections are specified in terms of
* caret positions. In a text widget that
* contains N characters, there are N+1 caret
* positions, ranging from 0..N. This differs
* from other functions that address character
* position such as getText () that use the
* regular array indexing rules.
* </p>
*
* @param start new caret position
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setSelection (int start) {
checkWidget();
/* Clear the selection and highlight before moving the i-beam. */
int xDisplay = OS.XtDisplay (handle);
if (xDisplay == 0) return;
int position = OS.XmTextGetLastPosition (handle);
int nStart = Math.min (Math.max (start, 0), position);
boolean warnings = display.getWarnings ();
display.setWarnings (false);
// OS.XmTextSetHighlight (handle, 0, position, OS.XmHIGHLIGHT_NORMAL);
OS.XmTextClearSelection (handle, OS.XtLastTimestampProcessed (xDisplay));
/* Set the i-beam position. */
OS.XmTextSetInsertionPosition (handle, nStart);
display.setWarnings (warnings);
}
/**
* Sets the selection to the range specified
* by the given start and end indices.
* <p>
* Indexing is zero based. The range of
* a selection is from 0..N where N is
* the number of characters in the widget.
* </p><p>
* Text selections are specified in terms of
* caret positions. In a text widget that
* contains N characters, there are N+1 caret
* positions, ranging from 0..N. This differs
* from other functions that address character
* position such as getText () that use the
* usual array indexing rules.
* </p>
*
* @param start the start of the range
* @param end the end of the range
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setSelection (int start, int end) {
checkWidget();
/* Clear the highlight before setting the selection. */
int position = OS.XmTextGetLastPosition (handle);
// OS.XmTextSetHighlight (handle, 0, position, OS.XmHIGHLIGHT_NORMAL);
/*
* Bug in MOTIF. XmTextSetSelection () fails to set the
* selection when the receiver is not realized. The fix
* is to force the receiver to be realized by forcing the
* shell to be realized. If the receiver is realized before
* the shell, MOTIF fails to draw the text widget and issues
* lots of X BadDrawable errors.
*/
if (!OS.XtIsRealized (handle)) getShell ().realizeWidget ();
/* Set the selection. */
int xDisplay = OS.XtDisplay (handle);
if (xDisplay == 0) return;
start = Math.min (Math.max (start, 0), position);
end = Math.min (Math.max (end, 0), position);
int nStart = Math.min (start, end), nEnd = Math.max (start, end);
boolean warnings = display.getWarnings ();
display.setWarnings (false);
OS.XmTextSetSelection (handle, nStart, nEnd, OS.XtLastTimestampProcessed (xDisplay));
/* Force the i-beam to follow the highlight/selection. */
if (start > end) {
OS.XmTextSetInsertionPosition (handle, nStart);
} else {
OS.XmTextSetInsertionPosition (handle, nEnd);
}
display.setWarnings (warnings);
}
/**
* Sets the selection to the range specified
* by the given point, where the x coordinate
* represents the start index and the y coordinate
* represents the end index.
* <p>
* Indexing is zero based. The range of
* a selection is from 0..N where N is
* the number of characters in the widget.
* </p><p>
* Text selections are specified in terms of
* caret positions. In a text widget that
* contains N characters, there are N+1 caret
* positions, ranging from 0..N. This differs
* from other functions that address character
* position such as getText () that use the
* usual array indexing rules.
* </p>
*
* @param selection the point
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the point is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setSelection (Point selection) {
checkWidget();
if (selection == null) error (SWT.ERROR_NULL_ARGUMENT);
setSelection (selection.x, selection.y);
}
/**
* Sets the number of tabs.
* <p>
* Tab stop spacing is specified in terms of the
* space (' ') character. The width of a single
* tab stop is the pixel width of the spaces.
* </p>
*
* @param tabs the number of tabs
*
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setTabs (int tabs) {
checkWidget();
/* Do nothing. Tabs are not supported in MOTIF. */
}
/**
* Sets the contents of the receiver to the given string. If the receiver has style
* SINGLE and the argument contains multiple lines of text, the result of this
* operation is undefined and may vary from platform to platform.
*
* @param string the new text
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setText (String string) {
checkWidget();
if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
byte [] buffer = Converter.wcsToMbcs (getCodePage (), string, true);
boolean warnings = display.getWarnings ();
display.setWarnings (false);
OS.XmTextSetString (handle, buffer);
OS.XmTextSetInsertionPosition (handle, 0);
display.setWarnings(warnings);
}
/**
* Sets the contents of the receiver to the characters in the array. If the receiver
* has style <code>SWT.SINGLE</code> and the argument contains multiple lines of text
* then the result of this operation is undefined and may vary between platforms.
*
* @param text a character array that contains the new text
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the array is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see #getTextChars()
*
* @since 3.7
*/
public void setTextChars (char [] text) {
checkWidget();
if (text == null) error (SWT.ERROR_NULL_ARGUMENT);
byte [] buffer = Converter.wcsToMbcs (getCodePage (), text, true);
boolean warnings = display.getWarnings ();
display.setWarnings (false);
OS.XmTextSetString (handle, buffer);
OS.XmTextSetInsertionPosition (handle, 0);
display.setWarnings(warnings);
}
/**
* Sets the maximum number of characters that the receiver
* is capable of holding to be the argument.
* <p>
* Instead of trying to set the text limit to zero, consider
* creating a read-only text widget.
* </p><p>
* To reset this value to the default, use <code>setTextLimit(Text.LIMIT)</code>.
* Specifying a limit value larger than <code>Text.LIMIT</code> sets the
* receiver's limit to <code>Text.LIMIT</code>.
* </p>
*
* @param limit new text limit
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_CANNOT_BE_ZERO - if the limit is zero</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see #LIMIT
*/
public void setTextLimit (int limit) {
checkWidget();
if (limit == 0) error (SWT.ERROR_CANNOT_BE_ZERO);
OS.XmTextSetMaxLength (handle, limit);
}
/**
* Sets the zero-relative index of the line which is currently
* at the top of the receiver. This index can change when lines
* are scrolled or new lines are added and removed.
*
* @param index the index of the top item
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setTopIndex (int index) {
checkWidget();
if ((style & SWT.SINGLE) != 0) return;
if (scrolledHandle == 0) return;
int [] argList1 = {OS.XmNverticalScrollBar, 0};
OS.XtGetValues (scrolledHandle, argList1, argList1.length / 2);
if (argList1 [1] == 0) return;
int [] argList2 = {OS.XmNvalue, 0};
OS.XtGetValues (argList1 [1], argList2, argList2.length / 2);
OS.XmTextScroll (handle, index - argList2 [1]);
}
/**
* Shows the selection.
* <p>
* If the selection is already showing
* in the receiver, this method simply returns. Otherwise,
* lines are scrolled until the selection is visible.
* </p>
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void showSelection () {
checkWidget();
boolean warnings = display.getWarnings ();
display.setWarnings (false);
int position = OS.XmTextGetInsertionPosition (handle);
OS.XmTextShowPosition (handle, position);
display.setWarnings (warnings);
}
int traversalCode (int key, XKeyEvent xEvent) {
int bits = super.traversalCode (key, xEvent);
if ((style & SWT.READ_ONLY) != 0) return bits;
if ((style & SWT.MULTI) != 0) {
bits &= ~SWT.TRAVERSE_RETURN;
if (key == OS.XK_Tab && xEvent != null) {
boolean next = (xEvent.state & OS.ShiftMask) == 0;
if (next && (xEvent.state & OS.ControlMask) == 0) {
bits &= ~(SWT.TRAVERSE_TAB_NEXT | SWT.TRAVERSE_TAB_PREVIOUS);
}
}
}
return bits;
}
int XExposure (int w, int client_data, int call_data, int continue_to_dispatch) {
if ((style & SWT.SINGLE) != 0 && message.length () > 0) {
if (!hasFocus () && OS.XmTextGetLastPosition (handle) == 0) {
/*
* Feature in Motif. XmText fills its background during exposure
* without respecting the damage clipping. This erases all previous
* paints. The fix is always to draw the entire content ignoring
* the damage.
*/
int [] argList = new int [] {
OS.XmNmarginWidth, 0,
OS.XmNmarginHeight, 0,
OS.XmNshadowThickness, 0,
OS.XmNhighlightThickness, 0,
OS.XmNwidth, 0,
OS.XmNheight, 0,
};
OS.XtGetValues (handle, argList, argList.length / 2);
int marginWidth = argList [1] + argList[5] + argList[7];
int marginHeight = argList [3] + argList[5] + argList[7];
Rectangle rect = new Rectangle (marginWidth, marginHeight, argList [9] - 2 * marginWidth, argList [11] - 2 * marginHeight);
GCData data = new GCData ();
GC gc = GC.motif_new (this, data);
gc.setForeground (disabledColor);
gc.setClipping (rect);
gc.drawString (message, rect.x, rect.y, true);
gc.dispose ();
}
}
return super.XExposure (w, client_data, call_data, continue_to_dispatch);
}
int xFocusIn (XFocusChangeEvent xEvent) {
super.xFocusIn (xEvent);
// widget could be disposed at this point
if (handle == 0) return 0;
if ((style & (SWT.READ_ONLY | SWT.SINGLE)) != 0) {
int [] argList = {OS.XmNcursorPositionVisible, 1};
OS.XtSetValues (handle, argList, argList.length / 2);
}
if ((style & SWT.SEARCH) != 0) {
redrawHandle (0, 0, 0, 0, true, handle);
}
return 0;
}
int xFocusOut (XFocusChangeEvent xEvent) {
super.xFocusOut (xEvent);
// widget could be disposed at this point
if (handle == 0) return 0;
if ((style & (SWT.READ_ONLY | SWT.SINGLE)) != 0) {
int [] argList = {OS.XmNcursorPositionVisible, 0};
OS.XtSetValues (handle, argList, argList.length / 2);
}
if ((style & SWT.SEARCH) != 0) {
redrawHandle (0, 0, 0, 0, true, handle);
}
return 0;
}
int XmNactivateCallback (int w, int client_data, int call_data) {
postEvent (SWT.DefaultSelection);
return 0;
}
int XmNmodifyVerifyCallback (int w, int client_data, int call_data) {
int result = super.XmNmodifyVerifyCallback (w, client_data, call_data);
if (result != 0) return result;
if (echoCharacter == '\0' && !hooks (SWT.Verify) && !filters (SWT.Verify)) return result;
XmTextVerifyCallbackStruct textVerify = new XmTextVerifyCallbackStruct ();
OS.memmove (textVerify, call_data, XmTextVerifyCallbackStruct.sizeof);
XmTextBlockRec textBlock = new XmTextBlockRec ();
OS.memmove (textBlock, textVerify.text, XmTextBlockRec.sizeof);
byte [] buffer = new byte [textBlock.length];
OS.memmove (buffer, textBlock.ptr, textBlock.length);
String codePage = getCodePage ();
String text = new String (Converter.mbcsToWcs (codePage, buffer));
String newText = text;
if (!ignoreChange) {
Event event = new Event ();
if (textVerify.event != 0) {
XKeyEvent xEvent = new XKeyEvent ();
OS.memmove (xEvent, textVerify.event, XKeyEvent.sizeof);
event.time = xEvent.time;
setKeyState (event, xEvent);
}
event.start = textVerify.startPos;
event.end = textVerify.endPos;
event.doit = textVerify.doit == 1;
event.text = text;
sendEvent (SWT.Verify, event);
newText = event.text;
textVerify.doit = (byte) ((event.doit && newText != null) ? 1 : 0);
}
if (newText != null) {
if (echoCharacter != '\0' && (textVerify.doit != 0)) {
String string = new String (hiddenText);
String prefix = string.substring (0, textVerify.startPos);
String suffix = string.substring (textVerify.endPos, string.length ());
string = prefix + newText + suffix;
hiddenText = new char [string.length()];
string.getChars(0, hiddenText.length, hiddenText, 0);
char [] charBuffer = new char [newText.length ()];
for (int i=0; i<charBuffer.length; i++) {
charBuffer [i] = echoCharacter;
}
newText = new String (charBuffer);
}
if (newText != text) {
OS.XtFree(textBlock.ptr);
byte [] buffer2 = Converter.wcsToMbcs (codePage, newText, true);
int length = buffer2.length;
int ptr = OS.XtMalloc (length);
OS.memmove (ptr, buffer2, length);
textBlock.ptr = ptr;
textBlock.length = buffer2.length - 1;
OS.memmove (textVerify.text, textBlock, XmTextBlockRec.sizeof);
}
}
OS.memmove (call_data, textVerify, XmTextVerifyCallbackStruct.sizeof);
return result;
}
int XmNvalueChangedCallback (int w, int client_data, int call_data) {
if (!ignoreChange) sendEvent (SWT.Modify);
return 0;
}
}