Implement text interface for QLineEdit.

Add boundary helper functions to the QAccessibleTextInterface.
Move LineEdit over to use QTextBoundaryFinder.

Reviewed-by: Jan-Arve
(cherry picked from commit c1ec1a95806cda54d5b4e9f8ed159a611bd75964)

Change-Id: Ib93599c49110aab50debe1e3fb0073dd34071c87
Reviewed-on: http://codereview.qt.nokia.com/3025
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@nokia.com>

2 files changed, 140 insertions, 12 deletions

diff --git a/src/gui/accessible/qaccessible2.cpp b/src/gui/accessible/qaccessible2.cpp
index 35b24f6e24..b62a7a4235 100644
--- a/src/gui/accessible/qaccessible2.cpp
+++ b/src/gui/accessible/qaccessible2.cpp
@@ -42,6 +42,7 @@
 #include "qaccessible2.h"
 #include "qapplication.h"
 #include "qclipboard.h"
+#include "qtextboundaryfinder.h"
 
 #ifndef QT_NO_ACCESSIBILITY
 
@@ -132,6 +133,117 @@ QT_BEGIN_NAMESPACE
     \link http://www.linux-foundation.org/en/Accessibility/IAccessible2 IAccessible2 Specification \endlink
 */
 
+
+/*!
+  \internal
+*/
+QString Q_GUI_EXPORT textBeforeOffsetFromString(int offset, QAccessible2::BoundaryType boundaryType,
+        int *startOffset, int *endOffset, const QString& text)
+{
+    QTextBoundaryFinder::BoundaryType type;
+    switch (boundaryType) {
+    case QAccessible2::CharBoundary:
+        type = QTextBoundaryFinder::Grapheme;
+        break;
+    case QAccessible2::WordBoundary:
+        type = QTextBoundaryFinder::Word;
+        break;
+    case QAccessible2::SentenceBoundary:
+        type = QTextBoundaryFinder::Sentence;
+        break;
+    default:
+        // in any other case return the whole line
+        *startOffset = 0;
+        *endOffset = text.length();
+        return text;
+    }
+
+    QTextBoundaryFinder boundary(type, text);
+    boundary.setPosition(offset);
+
+    if (!boundary.isAtBoundary()) {
+        boundary.toPreviousBoundary();
+    }
+    boundary.toPreviousBoundary();
+    *startOffset = boundary.position();
+    boundary.toNextBoundary();
+    *endOffset = boundary.position();
+
+    return text.mid(*startOffset, *endOffset - *startOffset);
+}
+
+/*!
+  \internal
+*/
+QString Q_GUI_EXPORT textAfterOffsetFromString(int offset, QAccessible2::BoundaryType boundaryType,
+        int *startOffset, int *endOffset, const QString& text)
+{
+    QTextBoundaryFinder::BoundaryType type;
+    switch (boundaryType) {
+    case QAccessible2::CharBoundary:
+        type = QTextBoundaryFinder::Grapheme;
+        break;
+    case QAccessible2::WordBoundary:
+        type = QTextBoundaryFinder::Word;
+        break;
+    case QAccessible2::SentenceBoundary:
+        type = QTextBoundaryFinder::Sentence;
+        break;
+    default:
+        // in any other case return the whole line
+        *startOffset = 0;
+        *endOffset = text.length();
+        return text;
+    }
+
+    QTextBoundaryFinder boundary(type, text);
+    boundary.setPosition(offset);
+
+    boundary.toNextBoundary();
+    *startOffset = boundary.position();
+    boundary.toNextBoundary();
+    *endOffset = boundary.position();
+
+    return text.mid(*startOffset, *endOffset - *startOffset);
+}
+
+/*!
+  \internal
+*/
+QString Q_GUI_EXPORT textAtOffsetFromString(int offset, QAccessible2::BoundaryType boundaryType,
+        int *startOffset, int *endOffset, const QString& text)
+{
+    QTextBoundaryFinder::BoundaryType type;
+    switch (boundaryType) {
+    case QAccessible2::CharBoundary:
+        type = QTextBoundaryFinder::Grapheme;
+        break;
+    case QAccessible2::WordBoundary:
+        type = QTextBoundaryFinder::Word;
+        break;
+    case QAccessible2::SentenceBoundary:
+        type = QTextBoundaryFinder::Sentence;
+        break;
+    default:
+        // in any other case return the whole line
+        *startOffset = 0;
+        *endOffset = text.length();
+        return text;
+    }
+
+    QTextBoundaryFinder boundary(type, text);
+    boundary.setPosition(offset);
+
+    if (!boundary.isAtBoundary()) {
+        boundary.toPreviousBoundary();
+    }
+    *startOffset = boundary.position();
+    boundary.toNextBoundary();
+    *endOffset = boundary.position();
+
+    return text.mid(*startOffset, *endOffset - *startOffset);
+}
+
 QAccessibleSimpleEditableTextInterface::QAccessibleSimpleEditableTextInterface(
                 QAccessibleInterface *accessibleInterface)
     : iface(accessibleInterface)
diff --git a/src/plugins/accessible/widgets/simplewidgets.cpp b/src/plugins/accessible/widgets/simplewidgets.cpp
index 1b10a7b734..179ec76299 100644
--- a/src/plugins/accessible/widgets/simplewidgets.cpp
+++ b/src/plugins/accessible/widgets/simplewidgets.cpp
@@ -68,6 +68,13 @@ extern QList<QWidget*> childWidgets(const QWidget *widget, bool includeTopLevel
 QString Q_GUI_EXPORT qt_accStripAmp(const QString &text);
 QString Q_GUI_EXPORT qt_accHotKey(const QString &text);
 
+QString Q_GUI_EXPORT textBeforeOffsetFromString(int offset, QAccessible2::BoundaryType boundaryType,
+        int *startOffset, int *endOffset, const QString& text);
+QString Q_GUI_EXPORT textAtOffsetFromString(int offset, QAccessible2::BoundaryType boundaryType,
+        int *startOffset, int *endOffset, const QString& text);
+QString Q_GUI_EXPORT textAfterOffsetFromString(int offset, QAccessible2::BoundaryType boundaryType,
+        int *startOffset, int *endOffset, const QString& text);
+
 /*!
   \class QAccessibleButton
   \brief The QAccessibleButton class implements the QAccessibleInterface for button type widgets.
@@ -804,25 +811,34 @@ QString QAccessibleLineEdit::text(int startOffset, int endOffset)
     return lineEdit()->text().mid(startOffset, endOffset - startOffset);
 }
 
-QString QAccessibleLineEdit::textBeforeOffset (int /*offset*/, BoundaryType /*boundaryType*/,
-        int * /*startOffset*/, int * /*endOffset*/)
+QString QAccessibleLineEdit::textBeforeOffset(int offset, BoundaryType boundaryType,
+        int *startOffset, int *endOffset)
 {
-    // TODO
-    return QString();
+    if (lineEdit()->echoMode() != QLineEdit::Normal) {
+        *startOffset = *endOffset = -1;
+        return QString();
+    }
+    return textBeforeOffsetFromString(offset, boundaryType, startOffset, endOffset, lineEdit()->text());
 }
 
-QString QAccessibleLineEdit::textAfterOffset(int /*offset*/, BoundaryType /*boundaryType*/,
-        int * /*startOffset*/, int * /*endOffset*/)
+QString QAccessibleLineEdit::textAfterOffset(int offset, BoundaryType boundaryType,
+        int *startOffset, int *endOffset)
 {
-    // TODO
-    return QString();
+    if (lineEdit()->echoMode() != QLineEdit::Normal) {
+        *startOffset = *endOffset = -1;
+        return QString();
+    }
+    return textAfterOffsetFromString(offset, boundaryType, startOffset, endOffset, lineEdit()->text());
 }
 
-QString QAccessibleLineEdit::textAtOffset(int /*offset*/, BoundaryType /*boundaryType*/,
-        int * /*startOffset*/, int * /*endOffset*/)
+QString QAccessibleLineEdit::textAtOffset(int offset, BoundaryType boundaryType,
+        int *startOffset, int *endOffset)
 {
-    // TODO
-    return QString();
+    if (lineEdit()->echoMode() != QLineEdit::Normal) {
+        *startOffset = *endOffset = -1;
+        return QString();
+    }
+    return textAtOffsetFromString(offset, boundaryType, startOffset, endOffset, lineEdit()->text());
 }
 
 void QAccessibleLineEdit::removeSelection(int selectionIndex)