Move the text cursor when the user select the document tree item

fb2edit.pro

@@ -9,7 +9,8 @@ HEADERS = \
     source/fb2read.hpp \
     source/fb2temp.hpp \
     source/fb2tree.hpp \
-    source/fb2view.hpp
+    source/fb2view.hpp \
+    source/fb2tool.h
 
 SOURCES = \
     source/fb2app.cpp \
@@ -22,11 +23,13 @@ SOURCES = \
     source/fb2tree.cpp \
     source/fb2view.cpp \
     source/fb2xml.cpp \
-    source/fb2xml2.cpp
+    source/fb2xml2.cpp \
+    source/fb2tool.cpp
 
 RESOURCES = \
     3rdparty/gnome/gnome.qrc \
-    source/res/fb2edit.qrc
+    source/res/fb2edit.qrc \
+    source/js/javascript.qrc
 
 TARGET = fb2edit
 

source/fb2main.cpp

@@ -88,7 +88,9 @@ void Fb2MainWindow::treeActivated(const QModelIndex &index)
 {
     if (!treeView) return;
     Fb2TreeModel *model = dynamic_cast<Fb2TreeModel*>(treeView->model());
-    if (model) model->select(index);
+    if (!model) return;
+    model->select(index);
+    selectionChanged();
 }
 
 void Fb2MainWindow::treeDestroyed()
@@ -473,16 +475,7 @@ void Fb2MainWindow::selectionChanged()
     actionTextSub->setChecked(textEdit->SubChecked());
     actionTextSup->setChecked(textEdit->SupChecked());
 
-    QString script = "\
-    (f = function(node){\
-        var tag = node.tagName;\
-        if (tag == 'BODY') return '';\
-        if (tag == 'DIV') tag = node.getAttribute('CLASS');\
-        return f(node.parentNode) + '/' + tag;\
-    })(document.getSelection().baseNode.parentNode);";
-
-    QString message = textEdit->page()->mainFrame()->evaluateJavaScript(script).toString();
-    statusBar()->showMessage(message);
+    statusBar()->showMessage(textEdit->status());
 }
 
 void Fb2MainWindow::undoChanged()

source/fb2read.cpp

@@ -99,6 +99,13 @@ Fb2ReadHandler::RootHandler::RootHandler(Fb2ReadHandler &owner, const QString &n
 {
     writer().writeStartDocument();
     writer().writeStartElement("html");
+    writer().writeStartElement("head");
+    writer().writeStartElement("script");
+    writer().writeAttribute("type", "text/javascript");
+    writer().writeAttribute("src", "qrc:/js/jquery.js");
+    writer().writeCharacters(" ");
+    writer().writeEndElement();
+    writer().writeEndElement();
     writer().writeStartElement("body");
 }
 

source/fb2tool.cpp

@@ -0,0 +1,27 @@
+#include "fb2tool.h"
+
+#include <QFile>
+#include <QTextStream>
+
+namespace FB2 {
+
+QString read(const QString &filename)
+{
+    // TODO: throw an exception instead of
+    // returning an empty string
+    QFile file( filename );
+    if (!file.open( QFile::ReadOnly)) return QString();
+
+    QTextStream in( &file );
+
+    // Input should be UTF-8
+    in.setCodec( "UTF-8" );
+
+    // This will automatically switch reading from
+    // UTF-8 to UTF-16 if a BOM is detected
+    in.setAutoDetectUnicode( true );
+
+    return in.readAll();
+}
+
+}

source/fb2tool.h

@@ -0,0 +1,12 @@
+#ifndef FB2TOOL_H
+#define FB2TOOL_H
+
+#include <QString>
+
+namespace FB2 {
+
+QString read(const QString &filename);
+
+}
+
+#endif // FB2TOOL_H

source/fb2tree.cpp

@@ -7,6 +7,8 @@
 #include <QTreeView>
 #include <QUrl>
 
+#include "fb2tool.h"
+
 Fb2TreeItem::Fb2TreeItem(QWebElement &element, Fb2TreeItem *parent)
     : QObject(parent)
     , m_element(element)
@@ -78,6 +80,29 @@ QString Fb2TreeItem::text() const
     return QString("<%1> %2").arg(m_name).arg(m_text);
 }
 
+QString Fb2TreeItem::selector() const
+{
+    QString text = "";
+    QString selector = ".get(0)";
+    QWebElement element = m_element;
+    QWebElement parent = element.parent();
+    while (!parent.isNull()) {
+        text.prepend(element.tagName()).prepend("/");
+        QWebElement child = parent.firstChild();
+        int index = -1;
+        while (!child.isNull()) {
+            index++;
+            if (child == element) break;
+            child = child.nextSibling();
+        }
+        if (index == -1) return QString();
+        selector.prepend(QString(".children().eq(%1)").arg(index));
+        element = parent;
+        parent = element.parent();
+    }
+    return selector.prepend("$('html')");
+}
+
 //---------------------------------------------------------------------------
 //  Fb2TreeModel
 //---------------------------------------------------------------------------
@@ -166,4 +191,10 @@ void Fb2TreeModel::select(const QModelIndex &index)
     Fb2TreeItem *node = item(index);
     QWebFrame *frame = m_view.page()->mainFrame();
     if (node) frame->scroll(0, node->pos().y() - frame->scrollPosition().y());
+
+    static QString setCursor = FB2::read(":/js/set_cursor.js");
+    QString javascript = QString("var element=%1;").arg(node->selector()) + setCursor;
+    frame->evaluateJavaScript(javascript);
+
+    m_view.setFocus();
 }

source/fb2tree.hpp

@@ -44,6 +44,8 @@ public:
         return m_element.geometry().topLeft();
     }
 
+    QString selector() const;
+
 private:
     QString static title(const QWebElement &element);
     void addChildren(QWebElement &parent);

source/fb2view.cpp

@@ -1,6 +1,7 @@
 #include "fb2view.hpp"
 #include "fb2read.hpp"
 #include "fb2save.h"
+#include "fb2tool.h"
 #include "fb2xml2.h"
 
 #include <QAction>
@@ -247,7 +248,13 @@ void Fb2WebView::insertImage()
 
 void Fb2WebView::execCommand(const QString &cmd, const QString &arg)
 {
-    QWebFrame *frame = page()->mainFrame();
-    QString js = QString("document.execCommand(\"%1\", false, \"%2\")").arg(cmd).arg(arg);
-    frame->evaluateJavaScript(js);
+    QString javascript = QString("document.execCommand(\"%1\",false,\"%2\")").arg(cmd).arg(arg);
+    page()->mainFrame()->evaluateJavaScript(javascript);
+}
+
+QString Fb2WebView::status()
+{
+    static QString javascript = FB2::read(":/js/get_status.js");
+    return page()->mainFrame()->evaluateJavaScript(javascript).toString();
+    return QString();
 }

source/fb2view.hpp

@@ -64,6 +64,7 @@ public:
     bool save(QIODevice *device);
     bool save(QString *string);
     QString toBodyXml();
+    QString status();
 
     bool UndoEnabled();
     bool RedoEnabled();

source/js/get_status.js

@@ -0,0 +1,7 @@
+(f = function(node){
+    var tag = node.tagName;
+    if (tag === 'BODY') return '';
+    if (tag === 'DIV') tag = node.getAttribute('CLASS');
+    return f(node.parentNode) + '/' + tag;
+})(document.getSelection().baseNode.parentNode);
+

source/js/javascript.qrc

@@ -0,0 +1,7 @@
+<RCC>
+    <qresource prefix="/js">
+        <file alias="jquery.js">../../3rdparty/jQuery/jquery.js</file>
+        <file>set_cursor.js</file>
+        <file>get_status.js</file>
+    </qresource>
+</RCC>

source/js/set_cursor.js

@@ -0,0 +1,6 @@
+var range = document.createRange();
+range.setStart(element, 0);
+range.setEnd(element, 0);
+var selection = window.getSelection();
+selection.removeAllRanges();
+selection.addRange(range);

source/res/fb2edit.qrc

@@ -8,5 +8,6 @@
         <file>blank.fb2</file>
         <file>style.css</file>
         <file alias="ts/ru.qm">../ts/ru.qm</file>
+        <file alias="js/jquery.js">../../3rdparty/jQuery/jquery.js</file>
     </qresource>
 </RCC>