From 2e1609f3e399ac6be91266a27e7e436ab07ae3df Mon Sep 17 00:00:00 2001
From: Konstantin Ritt <ritt.ks@gmail.com>
Date: Thu, 30 Jan 2014 01:59:00 +0200
Subject: [PATCH] Introduce QTextBlock::textFormats()

A convenient way to obtain the block format ranges that should be
applied to the block text.

Change-Id: I220429b7c9c592c4880357c0d7b1b21f6c1c11f3
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
---
 src/gui/text/qtextobject.cpp | 50 ++++++++++++++++++++++++++++++++++++
 src/gui/text/qtextobject.h   |  4 ++-
 2 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/src/gui/text/qtextobject.cpp b/src/gui/text/qtextobject.cpp
index d1a39c6ab6..bd1e970583 100644
--- a/src/gui/text/qtextobject.cpp
+++ b/src/gui/text/qtextobject.cpp
@@ -1233,6 +1233,56 @@ QString QTextBlock::text() const
     return text;
 }
 
+/*!
+    \since 5.3
+
+    Returns the block's text format options as a list of continuous ranges
+    of QTextCharFormat. The range's character format is used when inserting text
+    within the range boundaries.
+
+    \sa charFormat(), blockFormat()
+*/
+QList<QTextLayout::FormatRange> QTextBlock::textFormats() const
+{
+    QList<QTextLayout::FormatRange> formats;
+    if (!p || !n)
+        return formats;
+
+    const QTextFormatCollection *formatCollection = p->formatCollection();
+
+    int start = 0;
+    int cur = start;
+    int format = -1;
+
+    const int pos = position();
+    QTextDocumentPrivate::FragmentIterator it = p->find(pos);
+    QTextDocumentPrivate::FragmentIterator end = p->find(pos + length() - 1); // -1 to omit the block separator char
+    for (; it != end; ++it) {
+        const QTextFragmentData * const frag = it.value();
+        if (format != it.value()->format) {
+            if (cur - start > 0) {
+                QTextLayout::FormatRange range;
+                range.start = start;
+                range.length = cur - start;
+                range.format = formatCollection->charFormat(format);
+                formats.append(range);
+            }
+
+            format = frag->format;
+            start = cur;
+        }
+        cur += frag->size_array[0];
+    }
+    if (cur - start > 0) {
+        QTextLayout::FormatRange range;
+        range.start = start;
+        range.length = cur - start;
+        range.format = formatCollection->charFormat(format);
+        formats.append(range);
+    }
+
+    return formats;
+}
 
 /*!
     Returns the text document this text block belongs to, or 0 if the
diff --git a/src/gui/text/qtextobject.h b/src/gui/text/qtextobject.h
index 87f2cf6197..6a127f0315 100644
--- a/src/gui/text/qtextobject.h
+++ b/src/gui/text/qtextobject.h
@@ -44,6 +44,7 @@
 
 #include <QtCore/qobject.h>
 #include <QtGui/qtextformat.h>
+#include <QtGui/qtextlayout.h>
 #include <QtGui/qglyphrun.h>
 
 QT_BEGIN_NAMESPACE
@@ -55,7 +56,6 @@ class QTextDocumentPrivate;
 class QTextCursor;
 class QTextBlock;
 class QTextFragment;
-class QTextLayout;
 class QTextList;
 
 class Q_GUI_EXPORT QTextObject : public QObject
@@ -223,6 +223,8 @@ public:
 
     QString text() const;
 
+    QList<QTextLayout::FormatRange> textFormats() const;
+
     const QTextDocument *document() const;
 
     QTextList *textList() const;