0a338d03ed
Allow to check wether a precondition is met before actually executing an async jump handler.
79 lines
3.2 KiB
EmacsLisp
79 lines
3.2 KiB
EmacsLisp
;;; core-jump.el --- Spacemacs Core File
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;;
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;; Copyright (c) 2012-2017 Sylvain Benner & Contributors
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;;
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;; Author: Sylvain Benner <sylvain.benner@gmail.com>
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;; URL: https://github.com/syl20bnr/spacemacs
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;;
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;; This file is not part of GNU Emacs.
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;;
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;;; License: GPLv3
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(defvar spacemacs-default-jump-handlers '()
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"List of jump handlers available in every mode.")
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(defvar-local spacemacs-jump-handlers '()
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"List of jump handlers local to this buffer.")
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(defmacro spacemacs|define-jump-handlers (mode &rest handlers)
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"Defines jump handlers for the given MODE.
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This defines a variable `spacemacs-jump-handlers-MODE' to which
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handlers can be added, and a function added to MODE-hook which
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sets `spacemacs-jump-handlers' in buffers of that mode."
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(let ((mode-hook (intern (format "%S-hook" mode)))
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(func (intern (format "spacemacs//init-jump-handlers-%S" mode)))
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(handlers-list (intern (format "spacemacs-jump-handlers-%S" mode))))
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`(progn
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(defvar ,handlers-list ',handlers
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,(format (concat "List of mode-specific jump handlers for %S. "
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"These take priority over those in "
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"`spacemacs-default-jump-handlers'.")
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mode))
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(defun ,func ()
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(setq spacemacs-jump-handlers
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(append ,handlers-list
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spacemacs-default-jump-handlers)))
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(add-hook ',mode-hook ',func)
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(with-eval-after-load 'bind-map
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(spacemacs/set-leader-keys-for-major-mode ',mode
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"gg" 'spacemacs/jump-to-definition
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"gG" 'spacemacs/jump-to-definition-other-window)))))
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(defun spacemacs/jump-to-definition ()
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"Jump to definition around point using the best tool for this action."
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(interactive)
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(catch 'done
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(let ((old-buffer (current-buffer))
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(old-point (point)))
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(dolist (-handler spacemacs-jump-handlers)
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(let ((handler (if (listp -handler) (car -handler) -handler))
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(async (when (listp -handler)
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(plist-get (cdr -handler) :async))))
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(ignore-errors
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(call-interactively handler))
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(when (or (eq async t)
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(and (fboundp async) (funcall async))
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(not (eq old-point (point)))
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(not (equal old-buffer (current-buffer))))
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(throw 'done t)))))
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(message "No jump handler was able to find this symbol.")))
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(defun spacemacs/jump-to-definition-other-window ()
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"Jump to definition around point in other window."
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(interactive)
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(let ((pos (point)))
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;; since `spacemacs/jump-to-definition' can be asynchronous we cannot use
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;; `save-excursion' here, so we have to bear with the jumpy behavior.
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(switch-to-buffer-other-window (current-buffer))
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(goto-char pos)
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(spacemacs/jump-to-definition)))
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;; Set the `:jump' property manually instead of just using `evil-define-motion'
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;; in an `eval-after-load' macro invocation because doing that prevents
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;; `describe-function' from correctly finding the source.
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;;
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;; See discussion on https://github.com/syl20bnr/spacemacs/pull/6771
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(with-eval-after-load 'evil
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(evil-set-command-property 'spacemacs/jump-to-definition :jump t))
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(provide 'core-jump)
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