1 files changed, 90 insertions, 0 deletions
diff --git a/Lib/idlelib/textview.py b/Lib/idlelib/textview.py
new file mode 100644
index 0000000000..adee326e1d
--- /dev/null
+++ b/Lib/idlelib/textview.py
@@ -0,0 +1,90 @@
+"""Simple text browser for IDLE
+
+"""
+from tkinter import *
+from tkinter.ttk import Scrollbar
+from tkinter.messagebox import showerror
+
+
+class TextViewer(Toplevel):
+    "A simple text viewer dialog for IDLE."
+
+    def __init__(self, parent, title, text, modal=True, _htest=False):
+        """Show the given text in a scrollable window with a 'close' button
+
+        If modal option set to False, user can interact with other windows,
+        otherwise they will be unable to interact with other windows until
+        the textview window is closed.
+
+        _htest - bool; change box location when running htest.
+        """
+        Toplevel.__init__(self, parent)
+        self.configure(borderwidth=5)
+        # Place dialog below parent if running htest.
+        self.geometry("=%dx%d+%d+%d" % (750, 500,
+                           parent.winfo_rootx() + 10,
+                           parent.winfo_rooty() + (10 if not _htest else 100)))
+        # TODO: get fg/bg from theme.
+        self.bg = '#ffffff'
+        self.fg = '#000000'
+
+        self.CreateWidgets()
+        self.title(title)
+        self.protocol("WM_DELETE_WINDOW", self.Ok)
+        self.parent = parent
+        self.textView.focus_set()
+        # Bind keys for closing this dialog.
+        self.bind('<Return>',self.Ok)
+        self.bind('<Escape>',self.Ok)
+        self.textView.insert(0.0, text)
+        self.textView.config(state=DISABLED)
+
+        if modal:
+            self.transient(parent)
+            self.grab_set()
+            self.wait_window()
+
+    def CreateWidgets(self):
+        frameText = Frame(self, relief=SUNKEN, height=700)
+        frameButtons = Frame(self)
+        self.buttonOk = Button(frameButtons, text='Close',
+                               command=self.Ok, takefocus=FALSE)
+        self.scrollbarView = Scrollbar(frameText, orient=VERTICAL,
+                                       takefocus=FALSE)
+        self.textView = Text(frameText, wrap=WORD, highlightthickness=0,
+                             fg=self.fg, bg=self.bg)
+        self.scrollbarView.config(command=self.textView.yview)
+        self.textView.config(yscrollcommand=self.scrollbarView.set)
+        self.buttonOk.pack()
+        self.scrollbarView.pack(side=RIGHT,fill=Y)
+        self.textView.pack(side=LEFT,expand=TRUE,fill=BOTH)
+        frameButtons.pack(side=BOTTOM,fill=X)
+        frameText.pack(side=TOP,expand=TRUE,fill=BOTH)
+
+    def Ok(self, event=None):
+        self.destroy()
+
+
+def view_text(parent, title, text, modal=True):
+    return TextViewer(parent, title, text, modal)
+
+def view_file(parent, title, filename, encoding=None, modal=True):
+    try:
+        with open(filename, 'r', encoding=encoding) as file:
+            contents = file.read()
+    except OSError:
+        showerror(title='File Load Error',
+                  message='Unable to load file %r .' % filename,
+                  parent=parent)
+    except UnicodeDecodeError as err:
+        showerror(title='Unicode Decode Error',
+                  message=str(err),
+                  parent=parent)
+    else:
+        return view_text(parent, title, contents, modal)
+
+if __name__ == '__main__':
+    import unittest
+    unittest.main('idlelib.idle_test.test_textview', verbosity=2, exit=False)
+    from idlelib.idle_test.htest import run
+    run(TextViewer)