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133 lines
4.9 KiB
EmacsLisp
133 lines
4.9 KiB
EmacsLisp
;;; w32-common-fns.el --- Lisp routines for Windows and Cygwin-w32
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;; Copyright (C) 1994, 2001-2014 Free Software Foundation, Inc.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;;
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;;; This file contains functions that are used by both native NT Emacs
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;;; and Cygwin Emacs compiled to use the native Windows widget
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;;; library.
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(declare-function x-server-version "w32fns.c" (&optional terminal))
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(defun w32-version ()
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"Return the MS-Windows version numbers.
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The value is a list of three integers: the major and minor version
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numbers, and the build number."
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(x-server-version))
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(defun w32-using-nt ()
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"Return non-nil if running on a Windows NT descendant.
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That includes all Windows systems except for 9X/Me."
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(getenv "SystemRoot"))
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(declare-function w32-get-clipboard-data "w32select.c")
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(declare-function w32-set-clipboard-data "w32select.c")
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(declare-function x-server-version "w32fns.c" (&optional display))
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;;; Fix interface to (X-specific) mouse.el
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(defun x-set-selection (type data)
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"Make an X selection of type TYPE and value DATA.
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The argument TYPE (nil means `PRIMARY') says which selection, and
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DATA specifies the contents. TYPE must be a symbol. \(It can also
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be a string, which stands for the symbol with that name, but this
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is considered obsolete.) DATA may be a string, a symbol, an
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integer (or a cons of two integers or list of two integers).
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The selection may also be a cons of two markers pointing to the same buffer,
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or an overlay. In these cases, the selection is considered to be the text
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between the markers *at whatever time the selection is examined*.
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Thus, editing done in the buffer after you specify the selection
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can alter the effective value of the selection.
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The data may also be a vector of valid non-vector selection values.
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The return value is DATA.
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Interactively, this command sets the primary selection. Without
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prefix argument, it reads the selection in the minibuffer. With
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prefix argument, it uses the text of the region as the selection value.
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Note that on MS-Windows, primary and secondary selections set by Emacs
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are not available to other programs."
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(put 'x-selections (or type 'PRIMARY) data))
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(defun x-get-selection (&optional type _data-type)
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"Return the value of an X Windows selection.
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The argument TYPE (default `PRIMARY') says which selection,
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and the argument DATA-TYPE (default `STRING') says
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how to convert the data.
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TYPE may be any symbol \(but nil stands for `PRIMARY'). However,
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only a few symbols are commonly used. They conventionally have
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all upper-case names. The most often used ones, in addition to
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`PRIMARY', are `SECONDARY' and `CLIPBOARD'.
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DATA-TYPE is usually `STRING', but can also be one of the symbols
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in `selection-converter-alist', which see."
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(get 'x-selections (or type 'PRIMARY)))
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;; x-selection-owner-p is used in simple.el
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(defun x-selection-owner-p (&optional type)
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(and (memq type '(nil PRIMARY SECONDARY))
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(get 'x-selections (or type 'PRIMARY))))
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;; The "Windows" keys on newer keyboards bring up the Start menu
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;; whether you want it or not - make Emacs ignore these keystrokes
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;; rather than beep.
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(global-set-key [lwindow] 'ignore)
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(global-set-key [rwindow] 'ignore)
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(defvar w32-charset-info-alist) ; w32font.c
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;;;; Selections
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;; We keep track of the last text selected here, so we can check the
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;; current selection against it, and avoid passing back our own text
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;; from x-selection-value.
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(defvar x-last-selected-text nil)
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(defvar x-select-enable-clipboard)
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(defun x-get-selection-value ()
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"Return the value of the current selection.
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Consult the selection. Treat empty strings as if they were unset."
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(if x-select-enable-clipboard
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(let (text)
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;; Don't die if x-get-selection signals an error.
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(with-demoted-errors "w32-get-clipboard-data:%s"
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(setq text (w32-get-clipboard-data)))
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(if (string= text "") (setq text nil))
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(cond
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((not text) nil)
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((eq text x-last-selected-text) nil)
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((string= text x-last-selected-text)
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;; Record the newer string, so subsequent calls can use the 'eq' test.
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(setq x-last-selected-text text)
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nil)
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(t
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(setq x-last-selected-text text))))))
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(defalias 'x-selection-value 'x-get-selection-value)
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;; Arrange for the kill and yank functions to set and check the clipboard.
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(setq interprogram-cut-function 'x-select-text)
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(setq interprogram-paste-function 'x-get-selection-value)
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(provide 'w32-common-fns)
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