new file mode 100644
--- /dev/null
+++ b/src/textfile_gui.cpp
@@ -0,0 +1,194 @@
+/* $Id$ */
+
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file textfile_gui.cpp Implementation of textfile window. */
+
+#include "stdafx.h"
+#include "fileio_func.h"
+#include "fontcache.h"
+#include "gfx_type.h"
+#include "gfx_func.h"
+#include "string_func.h"
+#include "textfile_gui.h"
+
+#include "widgets/misc_widget.h"
+
+#include "table/strings.h"
+
+
+/** Widgets for the textfile window. */
+static const NWidgetPart _nested_textfile_widgets[] = {
+	NWidget(NWID_HORIZONTAL),
+		NWidget(WWT_CLOSEBOX, COLOUR_MAUVE),
+		NWidget(WWT_CAPTION, COLOUR_MAUVE, WID_TF_CAPTION), SetDataTip(STR_NULL, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),
+	EndContainer(),
+	NWidget(NWID_HORIZONTAL),
+		NWidget(WWT_PANEL, COLOUR_MAUVE, WID_TF_BACKGROUND), SetMinimalSize(200, 125), SetResize(1, 12), SetScrollbar(WID_TF_VSCROLLBAR),
+		EndContainer(),
+		NWidget(NWID_VERTICAL),
+			NWidget(NWID_VSCROLLBAR, COLOUR_MAUVE, WID_TF_VSCROLLBAR),
+		EndContainer(),
+	EndContainer(),
+	NWidget(NWID_HORIZONTAL),
+		NWidget(NWID_HSCROLLBAR, COLOUR_MAUVE, WID_TF_HSCROLLBAR),
+		NWidget(WWT_RESIZEBOX, COLOUR_MAUVE),
+	EndContainer(),
+};
+
+/** Window definition for the textfile window */
+static const WindowDesc _textfile_desc(
+	WDP_CENTER, 630, 460,
+	WC_TEXTFILE, WC_NONE,
+	WDF_UNCLICK_BUTTONS,
+	_nested_textfile_widgets, lengthof(_nested_textfile_widgets)
+);
+
+TextfileWindow::TextfileWindow(TextfileType file_type) : Window(), file_type(file_type)
+{
+	this->CreateNestedTree(&_textfile_desc);
+	this->vscroll = this->GetScrollbar(WID_TF_VSCROLLBAR);
+	this->hscroll = this->GetScrollbar(WID_TF_HSCROLLBAR);
+	this->FinishInitNested(&_textfile_desc);
+}
+
+/* virtual */ TextfileWindow::~TextfileWindow()
+{
+	free(this->text);
+}
+
+/* virtual */ void TextfileWindow::UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)
+{
+	switch (widget) {
+		case WID_TF_BACKGROUND:
+			this->line_height = FONT_HEIGHT_MONO + 2;
+			resize->height = this->line_height;
+
+			size->height = 4 * resize->height + TOP_SPACING + BOTTOM_SPACING; // At least 4 lines are visible.
+			size->width = max(200u, size->width); // At least 200 pixels wide.
+			break;
+	}
+}
+
+/* virtual */ void TextfileWindow::DrawWidget(const Rect &r, int widget) const
+{
+	if (widget != WID_TF_BACKGROUND) return;
+
+	int width = r.right - r.left + 1 - WD_BEVEL_LEFT - WD_BEVEL_RIGHT;
+	int height = r.bottom - r.top + 1 - WD_BEVEL_LEFT - WD_BEVEL_RIGHT;
+
+	DrawPixelInfo new_dpi;
+	if (!FillDrawPixelInfo(&new_dpi, r.left + WD_BEVEL_LEFT, r.top, width, height)) return;
+	DrawPixelInfo *old_dpi = _cur_dpi;
+	_cur_dpi = &new_dpi;
+
+	int left, right;
+	if (_current_text_dir == TD_RTL) {
+		left = width + WD_BEVEL_RIGHT - WD_FRAMETEXT_RIGHT - this->hscroll->GetCount();
+		right = width + WD_BEVEL_RIGHT - WD_FRAMETEXT_RIGHT - 1 + this->hscroll->GetPosition();
+	} else {
+		left = WD_FRAMETEXT_LEFT - WD_BEVEL_LEFT - this->hscroll->GetPosition();
+		right = WD_FRAMETEXT_LEFT - WD_BEVEL_LEFT + this->hscroll->GetCount() - 1;
+	}
+	int top = TOP_SPACING;
+	for (uint i = 0; i < this->vscroll->GetCapacity() && i + this->vscroll->GetPosition() < this->lines.Length(); i++) {
+		DrawString(left, right, top + i * this->line_height, this->lines[i + this->vscroll->GetPosition()], TC_WHITE, SA_LEFT, false, FS_MONO);
+	}
+
+	_cur_dpi = old_dpi;
+}
+
+/* virtual */ void TextfileWindow::OnResize()
+{
+	this->vscroll->SetCapacityFromWidget(this, WID_TF_BACKGROUND, TOP_SPACING + BOTTOM_SPACING);
+	this->hscroll->SetCapacityFromWidget(this, WID_TF_BACKGROUND);
+}
+
+/* virtual */ void TextfileWindow::Reset()
+{
+	this->search_iterator = 0;
+}
+
+/* virtual */ FontSize TextfileWindow::DefaultSize()
+{
+	return FS_MONO;
+}
+
+/* virtual */ const char *TextfileWindow::NextString()
+{
+	if (this->search_iterator >= this->lines.Length()) return NULL;
+
+	return this->lines[this->search_iterator++];
+}
+
+/* virtual */ bool TextfileWindow::Monospace()
+{
+	return true;
+}
+
+/* virtual */ void TextfileWindow::SetFontNames(FreeTypeSettings *settings, const char *font_name)
+{
+#ifdef WITH_FREETYPE
+	strecpy(settings->mono_font, font_name, lastof(settings->mono_font));
+#endif /* WITH_FREETYPE */
+}
+
+/**
+ * Loads the textfile text from file, and setup #lines, #max_length, and both scrollbars.
+ */
+/* virtual */ void TextfileWindow::LoadTextfile(const char *textfile, Subdirectory dir)
+{
+	if (textfile == NULL) return;
+
+	this->lines.Clear();
+
+	/* Get text from file */
+	size_t filesize;
+	FILE *handle = FioFOpenFile(textfile, "rb", dir, &filesize);
+	if (handle == NULL) return;
+
+	this->text = ReallocT(this->text, filesize + 1);
+	size_t read = fread(this->text, 1, filesize, handle);
+	fclose(handle);
+
+	if (read != filesize) return;
+
+	this->text[filesize] = '\0';
+
+	/* Replace tabs and line feeds with a space since str_validate removes those. */
+	for (char *p = this->text; *p != '\0'; p++) {
+		if (*p == '\t' || *p == '\r') *p = ' ';
+	}
+
+	/* Check for the byte-order-mark, and skip it if needed. */
+	char *p = this->text + (strncmp("\xEF\xBB\xBF", this->text, 3) == 0 ? 3 : 0);
+
+	/* Make sure the string is a valid UTF-8 sequence. */
+	str_validate(p, this->text + filesize, SVS_REPLACE_WITH_QUESTION_MARK | SVS_ALLOW_NEWLINE);
+
+	/* Split the string on newlines. */
+	*this->lines.Append() = p;
+	for (; *p != '\0'; p++) {
+		if (*p == '\n') {
+			*p = '\0';
+			*this->lines.Append() = p + 1;
+		}
+	}
+
+	CheckForMissingGlyphs(true, this);
+
+	/* Initialize scrollbars */
+	this->vscroll->SetCount(this->lines.Length());
+
+	this->max_length = 0;
+	for (uint i = 0; i < this->lines.Length(); i++) {
+		this->max_length = max(this->max_length, GetStringBoundingBox(this->lines[i], FS_MONO).width);
+	}
+	this->hscroll->SetCount(this->max_length + WD_FRAMETEXT_LEFT + WD_FRAMETEXT_RIGHT);
+	this->hscroll->SetStepSize(10); // Speed up horizontal scrollbar
+}