main.py 文件源码

def populate(self, fname):
        # this function populates the TextList and creates a new tabs
        # The same Textlist is used for each tab but when tabs are switched the
        # contents of the tab are grabbed from the files TabInfo instance
        if fname not in self.display.file_names:
            # grab the lines from the file and strip the newline char
            # then iterate through and create a new TextLine object for each line
            try:
                with open(fname) as f:
                    content = [x.strip('\n') for x in f.readlines()]
            except:
                self.redraw_tabs()
                return

            # the short name is the file name without a path
            self.short_name = strip_fname(fname)
            self.display.file_names.append(fname)
            new_lines = []

            # grab the lines from the file and strip the newline char
            # Then iterate through and create a new TextLine object for each line
            for line in content:
                text = TextLine(line, self.display)
                new_lines.append(text)

            # if the file is empty then add one empty line so it can be displayed
            if len(new_lines) < 1:
                text = TextLine(' ', self.display)
                new_lines.append(text)

            # create a new tab (button widget) with the correct attributes
            self.display.cur_tab = self.display.tab_info[fname] = TabInfo(self.display)
            new_tab_info = self.display.tab_info[fname]
            new_tab_info.lines = new_lines
            new_tab_info.undo = UndoStack(self.display)
            new_tab_info.cursor = (0, 0)

            self.display.line_nums.populate(new_lines)
            button = urwid.Button(self.short_name)
            button._label.align = 'center'
            attrib = urwid.AttrMap(button, 'footer')
            self.display.tabs.append(attrib)
            # switch to the new tab
            self.switch_tabs(fname)
        else:
            self.display.line_nums.populate(self.lines)
        self.redraw_tabs()