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dap-mouse.el
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dap-mouse.el
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;;; dap-mouse.el --- dap-mode mouse integration -*- lexical-binding: t; -*-
;; Copyright (C) 2019 Ivan Yonchovski
;; Author: Ivan Yonchovski <[email protected]>
;; Keywords:
;; This program 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.
;; This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;
;;; Code:
(require 'dap-mode)
(require 'dap-ui)
(require 'lsp-mode)
(require 'lsp-treemacs)
(require 'tooltip)
(defface dap-mouse-eval-thing-face
'((((class color) (background dark))
:background "grey10" :box (:line-width -1 :color "#2aa1ae")))
"Face used to display evaluation results at the end of line.
If `dap-overlays-use-font-lock' is non-nil, this face is
applied with lower priority than the syntax highlighting."
:group 'dap
:package-version '(dap "0.9.1"))
(defvar dap-mouse--hide-timer nil)
(defvar dap-mouse-posframe-properties
(list :min-width 50
:internal-border-width 2
:internal-border-color (face-attribute 'tooltip :background)
:width 50
:min-height 10)
"The properties which will be used for creating the `posframe'.")
(defconst dap-mouse-buffer "*dap-mouse*"
"Buffer name for `dap-mouse'.")
(defun dap-mouse--hide-popup? ()
(let ((buffer-under-mouse (window-buffer (cl-first (window-list (cl-first (mouse-position))))))
(popup-buffer (get-buffer dap-mouse-buffer)))
(not (or (and (eq (current-buffer) popup-buffer)
(eq buffer-under-mouse popup-buffer))
(eq buffer-under-mouse popup-buffer)))))
(defcustom dap-mouse-popup-timeout 0.3
"The time to wait after command before hiding the popup."
:type 'float
:group 'dap-mouse)
;;;###autoload
(define-minor-mode dap-tooltip-mode
"Toggle the display of GUD tooltips."
:global t
:group 'dap-mouse
:group 'tooltip (require 'tooltip)
(cond
(dap-tooltip-mode
(add-hook 'tooltip-functions 'dap-tooltip-tips)
(add-hook 'lsp-mode-hook 'dap-tooltip-update-mouse-motions-if-enabled)
(define-key lsp-mode-map [mouse-movement] 'dap-tooltip-mouse-motion))
((not tooltip-mode)
(remove-hook 'tooltip-functions 'dap-tooltip-tips)
(define-key lsp-mode-map [mouse-movement] 'ignore)
(remove-hook 'lsp-mode-hook 'dap-tooltip-update-mouse-motions-if-enabled)))
(dap-tooltip-update-mouse-motions-if-enabled))
(defcustom dap-tooltip-echo-area nil
"Use the echo area instead of frames for DAP tooltips."
:type 'boolean
:group 'dap-mouse
:group 'tooltip)
;;; Reacting on mouse movements
(defun dap-tooltip-update-mouse-motions-if-enabled ()
"Reconsider for all buffers whether mouse motion events are desired."
(remove-hook 'post-command-hook
'dap-tooltip-update-mouse-motions-if-enabled)
(dolist (buffer (buffer-list))
(with-current-buffer buffer
(if (and dap-tooltip-mode lsp-mode)
(dap-tooltip-activate-mouse-motions t)
(dap-tooltip-activate-mouse-motions nil)))))
(defvar dap-tooltip-mouse-motions-active nil
"Locally t in a buffer if tooltip processing of mouse motion is enabled.")
(defun dap-tooltip-activate-mouse-motions (activatep)
"Activate/deactivate mouse motion events for the current buffer.
ACTIVATEP non-nil means activate mouse motion events."
(if activatep
(progn
(set (make-local-variable 'dap-tooltip-mouse-motions-active) t)
(set (make-local-variable 'track-mouse) t))
(when dap-tooltip-mouse-motions-active
(kill-local-variable 'dap-tooltip-mouse-motions-active)
(kill-local-variable 'track-mouse))))
(defun dap-tooltip-mouse-motion (event)
"Command handler for mouse movement events in `dap-mode-map'.
EVENT is the last mouse movement event."
(interactive "e")
(tooltip-hide)
(when (car (mouse-pixel-position))
(tooltip-start-delayed-tip)
(setq tooltip-last-mouse-motion-event event)))
(defun dap-tooltip-thing-bounds (point)
"Return the thing at POINT that will be introspected.
If there is an active selection - return it."
(if (and (region-active-p)
(< (region-beginning) point (region-end)))
(cons (region-beginning) (region-end))
(save-excursion
(goto-char point)
(bounds-of-thing-at-point 'symbol))))
(defvar-local dap--tooltip-overlay nil)
(defun dap-tooltip-post-tooltip ()
"Clean tooltip properties."
(when dap-mouse--hide-timer
(cancel-timer dap-mouse--hide-timer))
(when (dap-mouse--hide-popup?)
(setq
dap-mouse--hide-timer
(run-at-time
dap-mouse-popup-timeout nil
(lambda ()
(when (dap-mouse--hide-popup?)
(posframe-hide dap-mouse-buffer)
(when dap--tooltip-overlay
(delete-overlay dap--tooltip-overlay)
;; restore the selection
(when (region-active-p)
(let ((start (overlay-start dap--tooltip-overlay))
(end (overlay-end dap--tooltip-overlay)))
(run-with-idle-timer
0.0
nil
(lambda ()
(let ((point (point)))
(push-mark start t t)
(goto-char end)
(unless (= point (point))
(exchange-point-and-mark))))))))
(setq dap-mouse--hide-timer nil)
(remove-hook 'post-command-hook #'dap-tooltip-post-tooltip)))))))
(defun dap-tooltip-at-point (&optional pos)
"Show information about the variable under point.
The result is displayed in a `treemacs' `posframe'. POS,
defaulting to `point', specifies where the cursor is and
consequently where to show the `posframe'."
(interactive)
(let ((debug-session (dap--cur-session))
(mouse-point (or pos (point))))
(when (and (dap--session-running debug-session)
mouse-point)
(-when-let* ((active-frame-id (-some->> debug-session
dap--debug-session-active-frame
(gethash "id")))
(bounds (dap-tooltip-thing-bounds mouse-point))
((start . end) bounds)
(expression (s-trim (buffer-substring start end))))
(dap--send-message
(dap--make-request "evaluate"
(list :expression expression
:frameId active-frame-id
:context "hover"))
(dap--resp-handler
(-lambda ((&hash "body" (&hash? "result"
"variablesReference" variables-reference)))
(setq dap--tooltip-overlay
(-doto (make-overlay start end)
(overlay-put 'mouse-face 'dap-mouse-eval-thing-face)))
;; Show a dead buffer so that the `posframe' size is consistent.
(when (get-buffer dap-mouse-buffer)
(kill-buffer dap-mouse-buffer))
(unless (and (zerop variables-reference) (string-empty-p result))
(apply #'posframe-show dap-mouse-buffer
:position start
:accept-focus t
dap-mouse-posframe-properties)
(with-current-buffer (get-buffer-create dap-mouse-buffer)
(dap-ui-render-value debug-session expression
result variables-reference)))
(add-hook 'post-command-hook 'dap-tooltip-post-tooltip))
;; TODO: hover failure will yield weird errors involving process
;; filters, so I resorted to this hack; we should proably do proper
;; error handling, with a whitelist of allowable errors.
#'ignore)
debug-session)))))
(defun dap-tooltip-tips (event)
"Show tip for identifier or selection under the mouse.
The mouse must either point at an identifier or inside a selected
region for the tip window to be shown. In the case of a C program
controlled by GDB, show the associated #define directives when
program is not executing.
This function must return nil if it doesn't handle EVENT."
(when (and (eventp event) dap-tooltip-mode)
(dap-tooltip-at-point (posn-point (event-end event)))))
(provide 'dap-mouse)
;;; dap-mouse.el ends here