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/*
* Copyright (c) 2014, 2024, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.glass.ui.win;
import static javafx.scene.AccessibleAttribute.*;
import java.text.BreakIterator;
import com.sun.javafx.util.Utils;
import javafx.geometry.Bounds;
import javafx.scene.AccessibleAction;
import javafx.scene.AccessibleAttribute;
import javafx.scene.text.Font;
import javafx.scene.text.FontWeight;
/*
* This class is the Java peer for GlassTextRangeProvider.
* GlassTextRangeProvider implements ITextRangeProvider.
*/
class WinTextRangeProvider {
private native static void _initIDs();
static {
_initIDs();
}
/* TextPatternRangeEndpoint */
private static final int TextPatternRangeEndpoint_Start = 0;
private static final int TextPatternRangeEndpoint_End = 1;
/* TextUnit enumeration */
private static final int TextUnit_Character = 0;
private static final int TextUnit_Format = 1;
private static final int TextUnit_Word = 2;
private static final int TextUnit_Line = 3;
private static final int TextUnit_Paragraph = 4;
private static final int TextUnit_Page = 5;
private static final int TextUnit_Document = 6;
/* Text Attribute Identifiers */
private static final int UIA_FontNameAttributeId = 40005;
private static final int UIA_FontSizeAttributeId = 40006;
private static final int UIA_FontWeightAttributeId = 40007;
private static final int UIA_IsHiddenAttributeId = 40013;
private static final int UIA_IsItalicAttributeId = 40014;
private static final int UIA_IsReadOnlyAttributeId = 40015;
private static int idCount = 1;
private int id;
private int start, end;
private WinAccessible accessible;
private long peer;
/* Creates a GlassTextRangeProvider linked to the caller (GlobalRef) */
private native long _createTextRangeProvider(long accessible);
/* Releases the GlassTextRangeProvider and deletes the GlobalRef */
private native void _destroyTextRangeProvider(long textRangeProvider);
WinTextRangeProvider(WinAccessible accessible) {
this.accessible = accessible;
peer = _createTextRangeProvider(accessible.getNativeAccessible());
id = idCount++;
}
long getNativeProvider() {
return peer;
}
void dispose() {
_destroyTextRangeProvider(peer);
peer = 0L;
}
private void validateRange(String text) {
if (text == null) {
start = end = 0;
return;
}
int length = text.length();
start = Utils.clamp(0, start, length);
end = Utils.clamp(start, end, length);
}
/**
* In the context of substrings, this method calculates the end index based on the start index,
* requested string length, and the maximum end index. 0 <= start <= end <= length;
* see {@link #validateRange(String)}.
*
* @param startIndex The start index in a string. Needs to be 0 or more (not checked in the code).
* @param length The requested length of a string when starting from "start".
* Negative numbers are treated as full length.
* @param endIndex The maximum end index to return. Needs to be equal or greater than startIndex
* (not checked in the code).
*/
static int getEndIndex(int startIndex, int length, int endIndex) {
if (length < 0 || (endIndex - startIndex) <= length) {
return endIndex;
}
return startIndex + length;
}
void setRange(int start, int end) {
this.start = start;
this.end = end;
}
int getStart() {
return start;
}
int getEnd() {
return end;
}
@Override public String toString() {
return "Range(start: " + start + ", end: " + end + ", id: " + id + ")";
}
private Object getAttribute(AccessibleAttribute attribute, Object... parameters) {
return accessible.getAttribute(attribute, parameters);
}
private boolean isWordStart(BreakIterator bi, String text, int offset) {
if (offset == 0) return true;
if (offset >= text.length()) return true;
if (offset == BreakIterator.DONE) return true;
return bi.isBoundary(offset) && Character.isLetterOrDigit(text.charAt(offset));
}
/***********************************************/
/* ITextRangeProvider */
/***********************************************/
private long Clone() {
WinTextRangeProvider clone = new WinTextRangeProvider(accessible);
clone.setRange(start, end);
/* Note: Currently Clone() natively does not call AddRef() on the returned object.
* This mean JFX does not keep a reference to this object, consequently it does not
* need to free it.
*/
return clone.getNativeProvider();
}
private boolean Compare(WinTextRangeProvider range) {
if (range == null) return false;
return accessible == range.accessible && start == range.start && end == range.end;
}
private int CompareEndpoints(int endpoint, WinTextRangeProvider targetRange, int targetEndpoint) {
int offset = endpoint == TextPatternRangeEndpoint_Start ? start : end;
int targetOffset = targetEndpoint == TextPatternRangeEndpoint_Start ? targetRange.start : targetRange.end;
return offset - targetOffset;
}
private void ExpandToEnclosingUnit(int unit) {
String text = (String)getAttribute(TEXT);
if (text == null) return;
int length = text.length();
if (length == 0) return;
validateRange(text);
switch (unit) {
case TextUnit_Character: {
if (start == length) start--;
end = start + 1;
break;
}
case TextUnit_Format:
case TextUnit_Word: {
BreakIterator bi = BreakIterator.getWordInstance();
bi.setText(text);
if (!isWordStart(bi, text, start)) {
int offset = bi.preceding(start);
while (!isWordStart(bi, text, offset)) {
offset = bi.previous();
}
start = offset != BreakIterator.DONE ? offset : 0;
}
if (!isWordStart(bi, text, end)) {
int offset = bi.following(end);
while (!isWordStart(bi, text, offset)) {
offset = bi.next();
}
end = offset != BreakIterator.DONE ? offset : length;
}
break;
}
case TextUnit_Line: {
Integer lineIndex = (Integer)getAttribute(LINE_FOR_OFFSET, start);
Integer lineStart = (Integer)getAttribute(LINE_START, lineIndex);
Integer lineEnd = (Integer)getAttribute(LINE_END, lineIndex);
if (lineIndex == null || lineEnd == null || lineStart == null) {
/* Text Field */
start = 0;
end = length;
} else {
/* Text Area */
start = lineStart;
end = lineEnd;
}
break;
}
case TextUnit_Paragraph: {
Integer lineIndex = (Integer)getAttribute(LINE_FOR_OFFSET, start);
if (lineIndex == null) {
/* Text Field */
start = 0;
end = length;
} else {
/* Text Area */
BreakIterator bi = BreakIterator.getSentenceInstance();
bi.setText(text);
if (!bi.isBoundary(start)) {
int offset = bi.preceding(start);
start = offset != BreakIterator.DONE ? offset : 0;
}
int offset = bi.following(start);
end = offset != BreakIterator.DONE ? offset : length;
}
break;
}
case TextUnit_Page:
case TextUnit_Document: {
start = 0;
end = length;
break;
}
}
/* Always ensure range consistency */
validateRange(text);
}
private long FindAttribute(int attributeId, WinVariant val, boolean backward) {
System.err.println("FindAttribute NOT IMPLEMENTED");
return 0;
}
private long FindText(String text, boolean backward, boolean ignoreCase) {
if (text == null) return 0;
String documentText = (String)getAttribute(TEXT);
if (documentText == null) return 0;
String rangeText = documentText.substring(start, end);
if (ignoreCase) {
rangeText = rangeText.toLowerCase();
text = text.toLowerCase();
}
int index = -1;
if (backward) {
index = rangeText.lastIndexOf(text);
} else {
index = rangeText.indexOf(text);
}
if (index == -1) return 0;
WinTextRangeProvider result = new WinTextRangeProvider(accessible);
result.setRange(start + index, start + index + text.length());
return result.getNativeProvider();
}
private WinVariant GetAttributeValue(int attributeId) {
WinVariant variant = null;
switch (attributeId) {
case UIA_FontNameAttributeId: {
Font font = (Font)getAttribute(FONT);
if (font != null) {
variant = new WinVariant();
variant.vt = WinVariant.VT_BSTR;
variant.bstrVal = font.getName();
}
break;
}
case UIA_FontSizeAttributeId: {
Font font = (Font)getAttribute(FONT);
if (font != null) {
variant = new WinVariant();
variant.vt = WinVariant.VT_R8;
variant.dblVal = font.getSize();
}
break;
}
case UIA_FontWeightAttributeId: {
Font font = (Font)getAttribute(FONT);
if (font != null) {
boolean bold = font.getStyle().toLowerCase().contains("bold");
variant = new WinVariant();
variant.vt = WinVariant.VT_I4;
variant.lVal = bold ? FontWeight.BOLD.getWeight() : FontWeight.NORMAL.getWeight();
}
break;
}
case UIA_IsHiddenAttributeId:
case UIA_IsReadOnlyAttributeId:
variant = new WinVariant();
variant.vt = WinVariant.VT_BOOL;
variant.boolVal = false;
break;
case UIA_IsItalicAttributeId: {
Font font = (Font)getAttribute(FONT);
if (font != null) {
boolean italic = font.getStyle().toLowerCase().contains("italic");
variant = new WinVariant();
variant.vt = WinVariant.VT_BOOL;
variant.boolVal = italic;
}
break;
}
default:
// System.out.println("GetAttributeValue " + attributeId + " Not implemented");
}
return variant;
}
private double[] GetBoundingRectangles() {
String text = (String)getAttribute(TEXT);
if (text == null) return null;
int length = text.length();
validateRange(text);
/* Narrator will not focus an empty text control if the bounds are NULL */
if (length == 0) return new double[0];
int endOffset = end;
if (endOffset > 0 && endOffset > start && text.charAt(endOffset - 1) == '\n') {
endOffset--;
}
if (endOffset > 0 && endOffset > start && text.charAt(endOffset - 1) == '\r') {
endOffset--;
}
if (endOffset > 0 && endOffset > start && endOffset == length) {
endOffset--;
}
Bounds[] bounds = (Bounds[])getAttribute(BOUNDS_FOR_RANGE, start, endOffset);
if (bounds != null) {
double[] result = new double[bounds.length * 4];
int index = 0;
for (int i = 0; i < bounds.length; i++) {
Bounds b = bounds[i];
float[] platformBounds = accessible.getPlatformBounds(
(float) b.getMinX(),
(float) b.getMinY(),
(float) b.getWidth(),
(float) b.getHeight());
result[index++] = platformBounds[0];
result[index++] = platformBounds[1];
result[index++] = platformBounds[2];
result[index++] = platformBounds[3];
}
return result;
}
return null;
}
private long GetEnclosingElement() {
return accessible.getNativeAccessible();
}
/**
* Returns the text contained in the TEXT attribute, starting from the start index and ending at the end index.
*
* @param maxLength The maximum length of the returned string
*/
private String GetText(int maxLength) {
String text = (String)getAttribute(TEXT);
if (text == null) return null;
validateRange(text);
int endOffset = getEndIndex(start, maxLength, end);
// System.out.println("+GetText [" + text.substring(start, endOffset)+"]");
return text.substring(start, endOffset);
}
private int Move(int unit, final int requestedCount) {
if (requestedCount == 0) return 0;
String text = (String)getAttribute(TEXT);
if (text == null) return 0;
int length = text.length();
if (length == 0) return 0;
int actualCount = 0;
switch (unit) {
case TextUnit_Character: {
int oldStart = start;
start = Math.max(0, Math.min(start + requestedCount, length - 1));
end = start + 1;
actualCount = start - oldStart;
break;
}
case TextUnit_Format:
case TextUnit_Word: {
BreakIterator bi = BreakIterator.getWordInstance();
bi.setText(text);
int offset = start;
while (!isWordStart(bi, text, offset)) {
offset = bi.preceding(start);
}
while (offset != BreakIterator.DONE && actualCount != requestedCount) {
if (requestedCount > 0) {
offset = bi.following(offset);
while (!isWordStart(bi, text, offset)) {
offset = bi.next();
}
actualCount++;
} else {
offset = bi.preceding(offset);
while (!isWordStart(bi, text, offset)) {
offset = bi.previous();
}
actualCount--;
}
}
if (actualCount != 0) {
if (offset != BreakIterator.DONE) {
start = offset;
} else {
start = requestedCount > 0 ? length : 0;
}
offset = bi.following(start);
while (!isWordStart(bi, text, offset)) {
offset = bi.next();
}
end = offset != BreakIterator.DONE ? offset : length;
}
break;
}
case TextUnit_Line: {
Integer lineIndex = (Integer)getAttribute(LINE_FOR_OFFSET, start);
if (lineIndex == null) return 0;
int step = requestedCount > 0 ? + 1 : -1;
while (requestedCount != actualCount) {
if (getAttribute(LINE_START, lineIndex + step) == null) break;
lineIndex += step;
actualCount += step;
}
if (actualCount != 0) {
Integer lineStart = (Integer)getAttribute(LINE_START, lineIndex);
Integer lineEnd = (Integer)getAttribute(LINE_END, lineIndex);
if (lineStart == null || lineEnd == null) return 0;
start = lineStart;
end = lineEnd;
}
break;
}
case TextUnit_Paragraph: {
BreakIterator bi = BreakIterator.getSentenceInstance();
bi.setText(text);
int offset = bi.isBoundary(start) ? start : bi.preceding(start);
while (offset != BreakIterator.DONE && actualCount != requestedCount) {
if (requestedCount > 0) {
offset = bi.following(offset);
actualCount++;
} else {
offset = bi.preceding(offset);
actualCount--;
}
}
if (actualCount != 0) {
start = offset != BreakIterator.DONE ? offset : 0;
offset = bi.following(start);
end = offset != BreakIterator.DONE ? offset : length;
}
break;
}
case TextUnit_Page:
case TextUnit_Document: {
/* Move not allowed/implemented - do not alter the range */
return 0;
}
}
/* Always ensure range consistency */
validateRange(text);
return actualCount;
}
private int MoveEndpointByUnit(int endpoint, int unit, final int requestedCount) {
if (requestedCount == 0) return 0;
String text = (String)getAttribute(TEXT);
if (text == null) return 0;
int length = text.length();
validateRange(text);
int actualCount = 0;
int offset = endpoint == TextPatternRangeEndpoint_Start ? start : end;
switch (unit) {
case TextUnit_Character: {
int oldOffset = offset;
offset = Math.max(0, Math.min(offset + requestedCount, length));
actualCount = offset - oldOffset;
break;
}
case TextUnit_Format:
case TextUnit_Word: {
BreakIterator bi = BreakIterator.getWordInstance();
bi.setText(text);
while (offset != BreakIterator.DONE && actualCount != requestedCount) {
if (requestedCount > 0) {
offset = bi.following(offset);
while (!isWordStart(bi, text, offset)) {
offset = bi.next();
}
actualCount++;
} else {
offset = bi.preceding(offset);
while (!isWordStart(bi, text, offset)) {
offset = bi.previous();
}
actualCount--;
}
}
if (offset == BreakIterator.DONE) {
offset = requestedCount > 0 ? length : 0;
}
break;
}
case TextUnit_Line: {
Integer lineIndex = (Integer)getAttribute(LINE_FOR_OFFSET, offset);
Integer lineStart = (Integer)getAttribute(LINE_START, lineIndex);
Integer lineEnd = (Integer)getAttribute(LINE_END, lineIndex);
if (lineIndex == null || lineStart == null || lineEnd == null) {
/* Text field - move within the text */
offset = requestedCount > 0 ? length : 0;
break;
}
int step = requestedCount > 0 ? + 1 : -1;
int endOffset = requestedCount > 0 ? lineEnd : lineStart;
if (offset != endOffset) {
/* Count current line when not traversal start in middle of the line */
actualCount += step;
}
while (requestedCount != actualCount) {
if (getAttribute(LINE_START, lineIndex + step) == null) break;
lineIndex += step;
actualCount += step;
}
if (actualCount != 0) {
lineStart = (Integer)getAttribute(LINE_START, lineIndex);
lineEnd = (Integer)getAttribute(LINE_END, lineIndex);
if (lineStart == null || lineEnd == null) return 0;
offset = requestedCount > 0 ? lineEnd : lineStart;
}
break;
}
case TextUnit_Paragraph: {
BreakIterator bi = BreakIterator.getSentenceInstance();
bi.setText(text);
while (offset != BreakIterator.DONE && actualCount != requestedCount) {
if (requestedCount > 0) {
offset = bi.following(offset);
actualCount++;
} else {
offset = bi.preceding(offset);
actualCount--;
}
}
if (offset == BreakIterator.DONE) {
offset = requestedCount > 0 ? length : 0;
}
break;
}
case TextUnit_Page:
case TextUnit_Document: {
/* Move not allowed/implemented - do not alter the range */
return 0;
}
}
if (endpoint == TextPatternRangeEndpoint_Start) {
start = offset;
} else {
end = offset;
}
if (start > end) {
start = end = offset;
}
/* Always ensure range consistency */
validateRange(text);
return actualCount;
}
private void MoveEndpointByRange(int endpoint, WinTextRangeProvider targetRange, int targetEndpoint) {
String text = (String)getAttribute(TEXT);
if (text == null) return;
int length = text.length();
int offset = targetEndpoint == TextPatternRangeEndpoint_Start ? targetRange.start : targetRange.end;
if (endpoint == TextPatternRangeEndpoint_Start) {
start = offset;
} else {
end = offset;
}
if (start > end) {
start = end = offset;
}
/* Always ensure range consistency */
validateRange(text);
}
private void Select() {
accessible.executeAction(AccessibleAction.SET_TEXT_SELECTION, start, end);
}
private void AddToSelection() {
/* Only possible for multi selection text view */
// accessible.executeAction(Action.ADD_TO_SELECTION, start, end);
}
private void RemoveFromSelection() {
/* Only possible for multi selection text view */
// accessible.executeAction(Action.REMOVE_FROM_SELECTION, start, end);
}
private void ScrollIntoView(boolean alignToTop) {
accessible.executeAction(AccessibleAction.SHOW_TEXT_RANGE, start, end);
}
private long[] GetChildren() {
/* Not embedded object support currently */
return new long[0];
}
}
