Add the QHexEdit widget

Add the QHexEdit widget as some sort of library. Feel free to improve the project files - I won't, every build system ever made is just horrible.
jgwin · Mar 16, 2013 · 0cf9ecd · 0cf9ecd
1 parent ac9901a
commit 0cf9ecd
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Showing 13 changed files with 2,346 additions and 9 deletions.
diff --git a/.gitignore b/.gitignore
@@ -7,3 +7,6 @@ Makefile
 sqlitedbbrowser.pro.user
 src/qrc_icons.cpp
 src/sqlitebrowser
+Makefile.antlr
+*.so
+*.so.*
diff --git a/libs/qhexedit/qhexedit.pro b/libs/qhexedit/qhexedit.pro
@@ -0,0 +1,15 @@
+TEMPLATE = lib
+
+MOC_DIR = .moc
+
+HEADERS += \
+    src/commands.h \
+    src/qhexedit.h \
+    src/qhexedit_p.h \
+    src/xbytearray.h
+
+SOURCES += \
+    src/commands.cpp \
+    src/qhexedit.cpp \
+    src/qhexedit_p.cpp \
+    src/xbytearray.cpp
diff --git a/libs/qhexedit/src/commands.cpp b/libs/qhexedit/src/commands.cpp
@@ -0,0 +1,115 @@
+#include "commands.h"
+
+CharCommand::CharCommand(XByteArray * xData, Cmd cmd, int charPos, char newChar, QUndoCommand *parent)
+    : QUndoCommand(parent)
+{
+    _xData = xData;
+    _charPos = charPos;
+    _newChar = newChar;
+    _cmd = cmd;
+}
+
+bool CharCommand::mergeWith(const QUndoCommand *command)
+{
+    const CharCommand *nextCommand = static_cast<const CharCommand *>(command);
+    bool result = false;
+
+    if (_cmd != remove)
+    {
+        if (nextCommand->_cmd == replace)
+            if (nextCommand->_charPos == _charPos)
+            {
+                _newChar = nextCommand->_newChar;
+                result = true;
+            }
+    }
+    return result;
+}
+
+void CharCommand::undo()
+{
+    switch (_cmd)
+    {
+        case insert:
+            _xData->remove(_charPos, 1);
+            break;
+        case replace:
+            _xData->replace(_charPos, _oldChar);
+            _xData->setDataChanged(_charPos, _wasChanged);
+            break;
+        case remove:
+            _xData->insert(_charPos, _oldChar);
+            _xData->setDataChanged(_charPos, _wasChanged);
+            break;
+    }
+}
+
+void CharCommand::redo()
+{
+    switch (_cmd)
+    {
+        case insert:
+            _xData->insert(_charPos, _newChar);
+            break;
+        case replace:
+            _oldChar = _xData->data()[_charPos];
+            _wasChanged = _xData->dataChanged(_charPos);
+            _xData->replace(_charPos, _newChar);
+            break;
+        case remove:
+            _oldChar = _xData->data()[_charPos];
+            _wasChanged = _xData->dataChanged(_charPos);
+            _xData->remove(_charPos, 1);
+            break;
+    }
+}
+
+
+
+ArrayCommand::ArrayCommand(XByteArray * xData, Cmd cmd, int baPos, QByteArray newBa, int len, QUndoCommand *parent)
+    : QUndoCommand(parent)
+{
+    _cmd = cmd;
+    _xData = xData;
+    _baPos = baPos;
+    _newBa = newBa;
+    _len = len;
+}
+
+void ArrayCommand::undo()
+{
+    switch (_cmd)
+    {
+        case insert:
+            _xData->remove(_baPos, _newBa.length());
+            break;
+        case replace:
+            _xData->replace(_baPos, _oldBa);
+            _xData->setDataChanged(_baPos, _wasChanged);
+            break;
+        case remove:
+            _xData->insert(_baPos, _oldBa);
+            _xData->setDataChanged(_baPos, _wasChanged);
+            break;
+    }
+}
+
+void ArrayCommand::redo()
+{
+    switch (_cmd)
+    {
+        case insert:
+            _xData->insert(_baPos, _newBa);
+            break;
+        case replace:
+            _oldBa = _xData->data().mid(_baPos, _len);
+            _wasChanged = _xData->dataChanged(_baPos, _len);
+            _xData->replace(_baPos, _newBa);
+            break;
+        case remove:
+            _oldBa = _xData->data().mid(_baPos, _len);
+            _wasChanged = _xData->dataChanged(_baPos, _len);
+            _xData->remove(_baPos, _len);
+            break;
+    }
+}
diff --git a/libs/qhexedit/src/commands.h b/libs/qhexedit/src/commands.h
@@ -0,0 +1,70 @@
+#ifndef COMMANDS_H
+#define COMMANDS_H
+
+/** \cond docNever */
+
+#include <QUndoCommand>
+
+#include "xbytearray.h"
+
+/*! CharCommand is a class to prived undo/redo functionality in QHexEdit.
+A QUndoCommand represents a single editing action on a document. CharCommand
+is responsable for manipulations on single chars. It can insert. replace and
+remove characters. A manipulation stores allways to actions
+1. redo (or do) action
+2. undo action.
+
+CharCommand also supports command compression via mergeWidht(). This allows
+the user to execute a undo command contation e.g. 3 steps in a single command.
+If you for example insert a new byt "34" this means for the editor doing 3
+steps: insert a "00", replace it with "03" and the replace it with "34". These
+3 steps are combined into a single step, insert a "34".
+*/
+class CharCommand : public QUndoCommand
+{
+public:
+    enum { Id = 1234 };
+    enum Cmd {insert, remove, replace};
+
+    CharCommand(XByteArray * xData, Cmd cmd, int charPos, char newChar,
+                       QUndoCommand *parent=0);
+
+    void undo();
+    void redo();
+    bool mergeWith(const QUndoCommand *command);
+    int id() const { return Id; }
+
+private:
+    XByteArray * _xData;
+    int _charPos;
+    bool _wasChanged;
+    char _newChar;
+    char _oldChar;
+    Cmd _cmd;
+};
+
+/*! ArrayCommand provides undo/redo functionality for handling binary strings. It
+can undo/redo insert, replace and remove binary strins (QByteArrays).
+*/
+class ArrayCommand : public QUndoCommand
+{
+public:
+    enum Cmd {insert, remove, replace};
+    ArrayCommand(XByteArray * xData, Cmd cmd, int baPos, QByteArray newBa=QByteArray(), int len=0,
+                 QUndoCommand *parent=0);
+    void undo();
+    void redo();
+
+private:
+    Cmd _cmd;
+    XByteArray * _xData;
+    int _baPos;
+    int _len;
+    QByteArray _wasChanged;
+    QByteArray _newBa;
+    QByteArray _oldBa;
+};
+
+/** \endcond docNever */
+
+#endif // COMMANDS_H