>From 08235af38c92e95d8ec9d268916d8910ea50ab2d Mon Sep 17 00:00:00 2001 From: "Basil L. Contovounesios" Date: Sun, 7 Apr 2019 03:36:47 +0100 Subject: [PATCH] Distinguish buttons from widgets (bug#34506) * lisp/button.el (button-at): * lisp/wid-edit.el (widget-at): Avoid returning a false positive when looking for a button and finding a widget, or vice versa. * test/lisp/button-tests.el: * test/lisp/wid-edit-tests.el: New files. --- lisp/button.el | 10 ++++++---- lisp/wid-edit.el | 5 +++-- test/lisp/button-tests.el | 40 +++++++++++++++++++++++++++++++++++++ test/lisp/wid-edit-tests.el | 39 ++++++++++++++++++++++++++++++++++++ 4 files changed, 88 insertions(+), 6 deletions(-) create mode 100644 test/lisp/button-tests.el create mode 100644 test/lisp/wid-edit-tests.el diff --git a/lisp/button.el b/lisp/button.el index c46f3d9a52..921e84dfa6 100644 --- a/lisp/button.el +++ b/lisp/button.el @@ -382,10 +382,12 @@ button-at If the button at POS is a text property button, the return value is a marker pointing to POS." (let ((button (get-char-property pos 'button))) - (if (or (overlayp button) (null button)) - button - ;; Must be a text-property button; return a marker pointing to it. - (copy-marker pos t)))) + (and button (get-char-property pos 'category) + (if (overlayp button) + button + ;; Must be a text-property button; + ;; return a marker pointing to it. + (copy-marker pos t))))) (defun next-button (pos &optional count-current) "Return the next button after position POS in the current buffer. diff --git a/lisp/wid-edit.el b/lisp/wid-edit.el index 52c0b5b74d..b9f98cdc4c 100644 --- a/lisp/wid-edit.el +++ b/lisp/wid-edit.el @@ -1163,8 +1163,9 @@ widget-field-list (defun widget-at (&optional pos) "The button or field at POS (default, point)." - (or (get-char-property (or pos (point)) 'button) - (widget-field-at pos))) + (let ((widget (or (get-char-property (or pos (point)) 'button) + (widget-field-at pos)))) + (and (widgetp widget) widget))) ;;;###autoload (defun widget-setup () diff --git a/test/lisp/button-tests.el b/test/lisp/button-tests.el new file mode 100644 index 0000000000..d54a992ab8 --- /dev/null +++ b/test/lisp/button-tests.el @@ -0,0 +1,40 @@ +;;; button-tests.el --- tests for button.el -*- lexical-binding: t -*- + +;; Copyright (C) 2019 Free Software Foundation, Inc. + +;; This file is part of GNU Emacs. + +;; GNU Emacs 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, either version 3 of the License, or +;; (at your option) any later version. + +;; GNU Emacs 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 GNU Emacs. If not, see . + +;;; Code: + +(require 'ert) + +(ert-deftest button-at () + "Test `button-at' behavior." + (with-temp-buffer + (should-not (button-at (point))) + (let ((button (insert-text-button "text button")) + (marker (button-at (1- (point))))) + (should (markerp marker)) + (should (= (button-end button) (button-end marker) (point)))) + (let ((button (insert-button "overlay button")) + (overlay (button-at (1- (point))))) + (should (overlayp overlay)) + (should (eq button overlay))) + ;; Buttons and widgets are incompatible (bug#34506). + (widget-create 'link "link widget") + (should-not (button-at (1- (point)))))) + +;;; button-tests.el ends here diff --git a/test/lisp/wid-edit-tests.el b/test/lisp/wid-edit-tests.el new file mode 100644 index 0000000000..a4350e715e --- /dev/null +++ b/test/lisp/wid-edit-tests.el @@ -0,0 +1,39 @@ +;;; wid-edit-tests.el --- tests for wid-edit.el -*- lexical-binding: t -*- + +;; Copyright (C) 2019 Free Software Foundation, Inc. + +;; This file is part of GNU Emacs. + +;; GNU Emacs 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, either version 3 of the License, or +;; (at your option) any later version. + +;; GNU Emacs 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 GNU Emacs. If not, see . + +;;; Code: + +(require 'ert) +(require 'wid-edit) + +(ert-deftest widget-at () + "Test `widget-at' behavior." + (with-temp-buffer + (should-not (widget-at)) + (let ((marco (widget-create 'link "link widget")) + (polo (widget-at (1- (point))))) + (should (widgetp polo)) + (should (eq marco polo))) + ;; Buttons and widgets are incompatible (bug#34506). + (insert-text-button "text button") + (should-not (widget-at (1- (point)))) + (insert-button "overlay button") + (should-not (widget-at (1- (point)))))) + +;;; wid-edit-tests.el ends here -- 2.20.1