From 4e82ed46d209d05508c7af24cfe135c78ee353db Mon Sep 17 00:00:00 2001
From: Miodrag Milanovic <mmicko@gmail.com>
Date: Thu, 14 Jun 2018 18:53:32 +0200
Subject: Split to classes

---
 gui/pythontab.cc | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 gui/pythontab.cc

(limited to 'gui/pythontab.cc')

diff --git a/gui/pythontab.cc b/gui/pythontab.cc
new file mode 100644
index 00000000..8f620958
--- /dev/null
+++ b/gui/pythontab.cc
@@ -0,0 +1,90 @@
+#include "pythontab.h"
+#include "emb.h"
+#include "pybindings.h"
+#include <QGridLayout>
+
+PythonTab::PythonTab(QWidget *parent) : QWidget(parent)
+{
+    PyImport_ImportModule("emb");
+
+    // Add text area for Python output and input line
+    plainTextEdit = new QPlainTextEdit();
+    plainTextEdit->setReadOnly(true);
+    plainTextEdit->setMinimumHeight(100);
+    lineEdit = new QLineEdit();
+    lineEdit->setMinimumHeight(30);
+    lineEdit->setMaximumHeight(30);
+
+    QGridLayout *mainLayout = new QGridLayout();
+    mainLayout->addWidget(plainTextEdit, 0, 0);
+    mainLayout->addWidget(lineEdit, 1, 0);
+    setLayout(mainLayout);
+
+    connect(lineEdit, SIGNAL(returnPressed()), this,
+            SLOT(editLineReturnPressed()));
+
+    write = [this](std::string s) {
+        plainTextEdit->moveCursor(QTextCursor::End);
+        plainTextEdit->insertPlainText(s.c_str());
+        plainTextEdit->moveCursor(QTextCursor::End);
+    };
+    emb::set_stdout(write);
+}
+
+void handle_system_exit() { exit(-1); }
+
+int PythonTab::executePython(std::string command)
+{
+    PyObject *m, *d, *v;
+    m = PyImport_AddModule("__main__");
+    if (m == NULL)
+        return -1;
+    d = PyModule_GetDict(m);
+    v = PyRun_StringFlags(command.c_str(),
+                          (command.empty() ? Py_file_input : Py_single_input),
+                          d, d, NULL);
+    if (v == NULL) {
+        PyObject *exception, *v, *tb;
+
+        if (PyErr_ExceptionMatches(PyExc_SystemExit)) {
+            handle_system_exit();
+        }
+        PyErr_Fetch(&exception, &v, &tb);
+        if (exception == NULL)
+            return 0;
+        PyErr_NormalizeException(&exception, &v, &tb);
+        if (tb == NULL) {
+            tb = Py_None;
+            Py_INCREF(tb);
+        }
+        PyException_SetTraceback(v, tb);
+        if (exception == NULL)
+            return 0;
+        PyErr_Clear();
+
+        PyObject *objectsRepresentation = PyObject_Str(v);
+        std::string errorStr =
+                PyUnicode_AsUTF8(objectsRepresentation) + std::string("\n");
+        plainTextEdit->moveCursor(QTextCursor::End);
+        plainTextEdit->insertPlainText(errorStr.c_str());
+        plainTextEdit->moveCursor(QTextCursor::End);
+        Py_DECREF(objectsRepresentation);
+        Py_XDECREF(exception);
+        Py_XDECREF(v);
+        Py_XDECREF(tb);
+        return -1;
+    }
+    Py_DECREF(v);
+    return 0;
+}
+
+void PythonTab::editLineReturnPressed()
+{
+    std::string input = lineEdit->text().toStdString();
+    plainTextEdit->moveCursor(QTextCursor::End);
+    plainTextEdit->insertPlainText(std::string(">>> " + input + "\n").c_str());
+    plainTextEdit->moveCursor(QTextCursor::End);
+    plainTextEdit->update();
+    lineEdit->clear();
+    int error = executePython(input);
+}
-- 
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