A JavaScript development environment for Emacs https://indium.readthedocs.io
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;;; indium-debugger-frames.el --- List the stack frame -*- lexical-binding: t; -*-
;; Copyright (C) 2017-2018 Nicolas Petton
;; Author: Nicolas Petton <nicolas@petton.fr>
;; 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 <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;;; Code:
(require 'indium-render)
(require 'indium-script)
(require 'indium-structs)
(declare-function indium-debugger-select-frame "indium-debugger.el")
(defun indium-debugger-stack-frames ()
"List the stack frames in a separate buffer and switch to it."
(interactive)
(let ((buf (indium-debugger-frames-get-buffer-create))
(inhibit-read-only t))
(with-current-buffer buf
(indium-debugger-frames-list (indium-current-connection-frames)
(indium-current-connection-current-frame)))
(pop-to-buffer buf)))
(defun indium-debugger-frames-maybe-refresh ()
"When a buffer listing the stack frames is open, refresh it."
(interactive)
(let ((buf (indium-debugger-frames-get-buffer))
(inhibit-read-only t))
(when buf
(with-current-buffer buf
(indium-debugger-frames-list (indium-current-connection-frames)
(indium-current-connection-current-frame))))))
(defun indium-debugger-frames-list (frames &optional current-frame)
"Render the list of stack frames FRAMES.
CURRENT-FRAME is the current stack frame in the debugger."
(save-excursion
(erase-buffer)
(indium-render-header "Debugger stack")
(newline 2)
(seq-doseq (frame frames)
(indium-render-frame frame
(indium-script-url (indium-frame-script frame))
(eq current-frame frame))
(newline))))
(defun indium-debugger-frames-select-frame (frame)
"Select FRAME and switch to the corresponding debugger buffer."
(interactive)
(indium-debugger-select-frame frame))
(defun indium-debugger-frames-next-frame ()
"Go to the next frame in the stack."
(interactive)
(indium-debugger-frames-goto-next 'next))
(defun indium-debugger-frames-previous-frame ()
"Go to the previos frame in the stack."
(interactive)
(indium-debugger-frames-goto-next 'previous))
(defun indium-debugger-frames-goto-next (direction)
"Go to the next frame in DIRECTION."
(let ((next (eq direction 'next)))
(forward-line (if next 1 -1))
(back-to-indentation)
(while (and (not (if next
(eobp)
(bobp)))
(not (get-text-property (point) 'indium-action)))
(forward-char (if next 1 -1)))))
(defun indium-debugger-frames-get-buffer ()
"Return the buffer listing frames for the current connection.
If no buffer is found, return nil."
(get-buffer (indium-debugger-frames-buffer-name)))
(defun indium-debugger-frames-buffer-name ()
"Return the name of the frames buffer for the current connection."
"*JS Frames*")
(defun indium-debugger-frames-get-buffer-create ()
"Create a buffer for listing frames unless one exists, and return it."
(let ((buf (indium-debugger-frames-get-buffer)))
(unless buf
(setq buf (generate-new-buffer (indium-debugger-frames-buffer-name)))
(indium-debugger-frames-setup-buffer buf))
buf))
(defun indium-debugger-frames-setup-buffer (buffer)
"Setup the frames BUFFER."
(with-current-buffer buffer
(indium-debugger-frames-mode)
(setq-local truncate-lines nil)))
(defvar indium-debugger-frames-mode-map
(let ((map (make-sparse-keymap)))
(define-key map [return] #'indium-follow-link)
(define-key map (kbd "C-m") #'indium-follow-link)
(define-key map (kbd "n") #'indium-debugger-frames-next-frame)
(define-key map (kbd "p") #'indium-debugger-frames-previous-frame)
(define-key map [tab] #'indium-debugger-frames-next-frame)
(define-key map [backtab] #'indium-debugger-frames-previous-frame)
map))
(define-derived-mode indium-debugger-frames-mode special-mode "Frames"
"Major mode visualizind and navigating the JS stack.
\\{indium-debugger-frames--mode-map}"
(setq buffer-read-only t)
(font-lock-ensure)
(read-only-mode))
(provide 'indium-debugger-frames)
;;; indium-debugger-frames.el ends here