diff --git a/src/misc_gui.cpp b/src/misc_gui.cpp
--- a/src/misc_gui.cpp
+++ b/src/misc_gui.cpp
@@ -30,16 +30,6 @@
 
 #include "table/strings.h"
 
-/**
- * Try to retrive the current clipboard contents.
- *
- * @note OS-specific funtion.
- * @return True if some text could be retrived.
- */
-bool GetClipboardContents(char *buffer, size_t buff_len);
-
-int _caret_timer;
-
 static const NWidgetPart _nested_land_info_widgets[] = {
 	NWidget(NWID_HORIZONTAL),
 		NWidget(WWT_CLOSEBOX, COLOUR_GREY),
@@ -715,260 +705,6 @@ void GuiShowTooltips(Window *parent, Str
 	new TooltipsWindow(parent, str, paramcount, params, close_tooltip);
 }
 
-/* Delete a character at the caret position in a text buf.
- * If backspace is set, delete the character before the caret,
- * else delete the character after it. */
-static void DelChar(Textbuf *tb, bool backspace)
-{
-	WChar c;
-	char *s = tb->buf + tb->caretpos;
-
-	if (backspace) s = Utf8PrevChar(s);
-
-	uint16 len = (uint16)Utf8Decode(&c, s);
-	uint width = GetCharacterWidth(FS_NORMAL, c);
-
-	tb->pixels -= width;
-	if (backspace) {
-		tb->caretpos   -= len;
-		tb->caretxoffs -= width;
-	}
-
-	/* Move the remaining characters over the marker */
-	memmove(s, s + len, tb->bytes - (s - tb->buf) - len);
-	tb->bytes -= len;
-	tb->chars--;
-}
-
-/**
- * Delete a character from a textbuffer, either with 'Delete' or 'Backspace'
- * The character is delete from the position the caret is at
- * @param tb Textbuf type to be changed
- * @param delmode Type of deletion, either WKC_BACKSPACE or WKC_DELETE
- * @return Return true on successful change of Textbuf, or false otherwise
- */
-bool DeleteTextBufferChar(Textbuf *tb, int delmode)
-{
-	if (delmode == WKC_BACKSPACE && tb->caretpos != 0) {
-		DelChar(tb, true);
-		return true;
-	} else if (delmode == WKC_DELETE && tb->caretpos < tb->bytes - 1) {
-		DelChar(tb, false);
-		return true;
-	}
-
-	return false;
-}
-
-/**
- * Delete every character in the textbuffer
- * @param tb Textbuf buffer to be emptied
- */
-void DeleteTextBufferAll(Textbuf *tb)
-{
-	memset(tb->buf, 0, tb->max_bytes);
-	tb->bytes = tb->chars = 1;
-	tb->pixels = tb->caretpos = tb->caretxoffs = 0;
-}
-
-/**
- * Insert a character to a textbuffer. If maxwidth of the Textbuf is zero,
- * we don't care about the visual-length but only about the physical
- * length of the string
- * @param tb Textbuf type to be changed
- * @param key Character to be inserted
- * @return Return true on successful change of Textbuf, or false otherwise
- */
-bool InsertTextBufferChar(Textbuf *tb, WChar key)
-{
-	const byte charwidth = GetCharacterWidth(FS_NORMAL, key);
-	uint16 len = (uint16)Utf8CharLen(key);
-	if (tb->bytes + len <= tb->max_bytes && tb->chars + 1 <= tb->max_chars) {
-		memmove(tb->buf + tb->caretpos + len, tb->buf + tb->caretpos, tb->bytes - tb->caretpos);
-		Utf8Encode(tb->buf + tb->caretpos, key);
-		tb->chars++;
-		tb->bytes  += len;
-		tb->pixels += charwidth;
-
-		tb->caretpos   += len;
-		tb->caretxoffs += charwidth;
-		return true;
-	}
-	return false;
-}
-
-/**
- * Insert a chunk of text from the clipboard onto the textbuffer. Get TEXT clipboard
- * and append this up to the maximum length (either absolute or screenlength). If maxlength
- * is zero, we don't care about the screenlength but only about the physical length of the string
- * @param tb Textbuf type to be changed
- * @return true on successful change of Textbuf, or false otherwise
- */
-bool InsertTextBufferClipboard(Textbuf *tb)
-{
-	char utf8_buf[512];
-
-	if (!GetClipboardContents(utf8_buf, lengthof(utf8_buf))) return false;
-
-	uint16 pixels = 0, bytes = 0, chars = 0;
-	WChar c;
-	for (const char *ptr = utf8_buf; (c = Utf8Consume(&ptr)) != '\0';) {
-		if (!IsPrintable(c)) break;
-
-		byte len = Utf8CharLen(c);
-		if (tb->bytes + bytes + len > tb->max_bytes) break;
-		if (tb->chars + chars + 1   > tb->max_chars) break;
-
-		byte char_pixels = GetCharacterWidth(FS_NORMAL, c);
-
-		pixels += char_pixels;
-		bytes += len;
-		chars++;
-	}
-
-	if (bytes == 0) return false;
-
-	memmove(tb->buf + tb->caretpos + bytes, tb->buf + tb->caretpos, tb->bytes - tb->caretpos);
-	memcpy(tb->buf + tb->caretpos, utf8_buf, bytes);
-	tb->pixels += pixels;
-	tb->caretxoffs += pixels;
-
-	tb->bytes += bytes;
-	tb->chars += chars;
-	tb->caretpos += bytes;
-	assert(tb->bytes <= tb->max_bytes);
-	assert(tb->chars <= tb->max_chars);
-	tb->buf[tb->bytes - 1] = '\0'; // terminating zero
-
-	return true;
-}
-
-/**
- * Handle text navigation with arrow keys left/right.
- * This defines where the caret will blink and the next characer interaction will occur
- * @param tb Textbuf type where navigation occurs
- * @param navmode Direction in which navigation occurs WKC_LEFT, WKC_RIGHT, WKC_END, WKC_HOME
- * @return Return true on successful change of Textbuf, or false otherwise
- */
-bool MoveTextBufferPos(Textbuf *tb, int navmode)
-{
-	switch (navmode) {
-		case WKC_LEFT:
-			if (tb->caretpos != 0) {
-				WChar c;
-				const char *s = Utf8PrevChar(tb->buf + tb->caretpos);
-				Utf8Decode(&c, s);
-				tb->caretpos    = s - tb->buf; // -= (tb->buf + tb->caretpos - s)
-				tb->caretxoffs -= GetCharacterWidth(FS_NORMAL, c);
-
-				return true;
-			}
-			break;
-
-		case WKC_RIGHT:
-			if (tb->caretpos < tb->bytes - 1) {
-				WChar c;
-
-				tb->caretpos   += (uint16)Utf8Decode(&c, tb->buf + tb->caretpos);
-				tb->caretxoffs += GetCharacterWidth(FS_NORMAL, c);
-
-				return true;
-			}
-			break;
-
-		case WKC_HOME:
-			tb->caretpos = 0;
-			tb->caretxoffs = 0;
-			return true;
-
-		case WKC_END:
-			tb->caretpos = tb->bytes - 1;
-			tb->caretxoffs = tb->pixels;
-			return true;
-
-		default:
-			break;
-	}
-
-	return false;
-}
-
-/**
- * Initialize the textbuffer by supplying it the buffer to write into
- * and the maximum length of this buffer
- * @param tb Textbuf type which is getting initialized
- * @param buf the buffer that will be holding the data for input
- * @param max_bytes maximum size in bytes, including terminating '\0'
- */
-void InitializeTextBuffer(Textbuf *tb, char *buf, uint16 max_bytes)
-{
-	InitializeTextBuffer(tb, buf, max_bytes, max_bytes);
-}
-
-/**
- * Initialize the textbuffer by supplying it the buffer to write into
- * and the maximum length of this buffer
- * @param tb Textbuf type which is getting initialized
- * @param buf the buffer that will be holding the data for input
- * @param max_bytes maximum size in bytes, including terminating '\0'
- * @param max_chars maximum size in chars, including terminating '\0'
- */
-void InitializeTextBuffer(Textbuf *tb, char *buf, uint16 max_bytes, uint16 max_chars)
-{
-	assert(max_bytes != 0);
-	assert(max_chars != 0);
-
-	tb->buf        = buf;
-	tb->max_bytes  = max_bytes;
-	tb->max_chars  = max_chars;
-	tb->caret      = true;
-	UpdateTextBufferSize(tb);
-}
-
-/**
- * Update Textbuf type with its actual physical character and screenlength
- * Get the count of characters in the string as well as the width in pixels.
- * Useful when copying in a larger amount of text at once
- * @param tb Textbuf type which length is calculated
- */
-void UpdateTextBufferSize(Textbuf *tb)
-{
-	const char *buf = tb->buf;
-
-	tb->pixels = 0;
-	tb->chars = tb->bytes = 1; // terminating zero
-
-	WChar c;
-	while ((c = Utf8Consume(&buf)) != '\0') {
-		tb->pixels += GetCharacterWidth(FS_NORMAL, c);
-		tb->bytes += Utf8CharLen(c);
-		tb->chars++;
-	}
-
-	assert(tb->bytes <= tb->max_bytes);
-	assert(tb->chars <= tb->max_chars);
-
-	tb->caretpos = tb->bytes - 1;
-	tb->caretxoffs = tb->pixels;
-}
-
-/**
- * Handle the flashing of the caret.
- * @param tb The text buffer to handle the caret of.
- * @return True if the caret state changes.
- */
-bool HandleCaret(Textbuf *tb)
-{
-	/* caret changed? */
-	bool b = !!(_caret_timer & 0x20);
-
-	if (b != tb->caret) {
-		tb->caret = b;
-		return true;
-	}
-	return false;
-}
-
 bool QueryString::HasEditBoxFocus(const Window *w, int wid) const
 {
 	if (w->IsWidgetGloballyFocused(wid)) return true;