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;;; lsp-java-treemacs.el --- LSP Java treemacs integration -*- lexical-binding: t; -*-
;; Copyright (C) 2018 Ivan Yonchovski
;; Author: Ivan Yonchovski <yyoncho@gmail.com>
;; Keywords: lsp
;; 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:
;; Provides integration between `lsp-java' and `treemacs' which aims to provide
;; ide like project explorer.
;;; Code:
(require 'dash)
(require 'lsp-mode)
(require 'lsp-java)
(require 'dash-functional)
(require 'treemacs)
(require 'treemacs-extensions)
(require 'treemacs-icons)
(defface lsp-java-treemacs-directory-face
'((t :inherit treemacs-directory-face))
"Face used by treemacs for lsp-java directories and packages."
:group 'lsp-java-treemacs)
(defface lsp-java-treemacs-extension-root-face
'((t :inherit treemacs-directory-face ))
"Face used for the extension root."
:group 'lsp-java-treemacs)
(defface lsp-java-treemacs-file-face
'((t :inherit treemacs-file-face))
"Face used by treemacs for files."
:group 'lsp-java-treemacs)
(defun lsp-java-treemacs--is-root (dir-or-project)
"Return whether DIR-OR-PROJECT is root of a project."
(let ((dir (if (stringp dir-or-project)
dir-or-project
(treemacs-project->path dir-or-project))))
(when-lsp-workspace (lsp-java--find-workspace dir)
(-contains? (lsp-java--get-project-uris lsp--cur-workspace)
(lsp--path-to-uri dir)))))
(defun lsp-java-treemacs--get-libraries (project-uri)
"Get the list of buffers, grouped by their major mode.
PROJECT-URI is the project id of the active project."
(when-lsp-workspace (lsp-java--find-workspace project-uri)
(lsp-send-execute-command "che.jdt.ls.extension.externalLibraries"
(list :projectUri project-uri))))
(defun lsp-java-treemacs--library-children (project-uri node-id)
"Get the list of library children.
PROJECT-URI and NODE-ID are the details for the current node."
(when-lsp-workspace (lsp-java--find-workspace project-uri)
(lsp-send-execute-command "che.jdt.ls.extension.libraryChildren"
(list :projectUri project-uri
:nodeId node-id))))
(defun lsp-java-treemacs--external-library-children (project-uri node-id path)
"Get the list of external library children.
PROJECT-URI, NODE-ID and PATH are the details for the current node."
(when-lsp-workspace (lsp-java--find-workspace project-uri)
(lsp-send-execute-command "che.jdt.ls.extension.externalLibrariesChildren"
(list :projectUri project-uri
:nodeId node-id
:nodePath path))))
(defun lsp-java-treemacs--open-file (_arg)
"Open resource file."
(when-lsp-workspace (lsp-java--find-workspace (treemacs--prop-at-point :project-uri))
(->> (treemacs--prop-at-point :uri)
lsp--uri-to-path
find-file)))
(treemacs-define-leaf-node lsp-file treemacs-icon-java
:ret-action 'lsp-java-treemacs--open-file)
(defmacro lsp-java-treemacs--setup-icon (var file-name &rest extensions)
"Define VAR with its display property being the image created from FILE-NAME.
Insert VAR into `treemacs-icon-hash' for each of the given file EXTENSIONS."
(unless (treemacs--is-image-creation-impossible?)
`(progn
(defvar ,var
(let* ((image-unselected (treemacs--create-image (f-join (f-dirname (or load-file-name buffer-file-name)) ,file-name)))
(image-selected (treemacs--create-image (f-join (f-dirname (or load-file-name buffer-file-name)) ,file-name))))
(treemacs--set-img-property image-selected :background treemacs--selected-icon-background)
(treemacs--set-img-property image-unselected :background treemacs--not-selected-icon-background)
(concat (propertize " "
'display image-unselected
'img-selected image-selected
'img-unselected image-unselected)
" ")))
(push ,var treemacs--created-icons)
(--each (quote ,extensions) (ht-set! treemacs-icons-hash it ,var))
,var)))
(if (treemacs--is-image-creation-impossible?)
(treemacs--set-icon-save-default
lsp-java-treemacs-jar treemacs-icon-closed-text
lsp-java-treemacs-jar-opened treemacs-icon-open-text
lsp-java-treemacs-package treemacs-icon-closed-text
lsp-java-treemacs-package-opened treemacs-icon-open-text
lsp-java-treemacs-jar-folder treemacs-icon-closed-text
lsp-java-treemacs-jar-folder-opened treemacs-icon-open-text
lsp-java-treemacs-library-folder treemacs-icon-closed-text
lsp-java-treemacs-library-folder-opened treemacs-icon-open-text
lsp-java-treemacs-class treemacs-icon-tag-leaf-text)
(progn
(lsp-java-treemacs--setup-icon lsp-java-treemacs-jar "icons/vscode/file_type_jar.png")
(lsp-java-treemacs--setup-icon lsp-java-treemacs-jar-opened "icons/vscode/file_type_jar.png")
(lsp-java-treemacs--setup-icon lsp-java-treemacs-package "icons/vscode/folder_type_package.png")
(lsp-java-treemacs--setup-icon lsp-java-treemacs-package-opened "icons/vscode/folder_type_package_opened.png")
(lsp-java-treemacs--setup-icon lsp-java-treemacs-jar-folder "icons/vscode/folder_type_component.png")
(lsp-java-treemacs--setup-icon lsp-java-treemacs-jar-folder-opened "icons/vscode/folder_type_component_opened.png")
(lsp-java-treemacs--setup-icon lsp-java-treemacs-library-folder "icons/vscode/folder_type_library.png")
(lsp-java-treemacs--setup-icon lsp-java-treemacs-library-folder-opened "icons/vscode/folder_type_library_opened.png")
(lsp-java-treemacs--setup-icon lsp-java-treemacs-class "icons/vscode/file_type_class.png" "class")))
(defmacro treemacs--lsp-node-or-folder ()
"Extract common code from nodes."
(let ((more-properties '(:project-uri (button-get btn :project-uri)
:node-path node-path
:node-id (button-get btn :node-id)
:uri uri)))
`(-let (((&hash "name" "entryType" "uri" "path" node-path) item))
(pcase entryType
("PACKAGE"
(treemacs-render-node :icon treemacs-icon-package-closed
:label-form name
:state treemacs-package-closed-state
:key-form node-path
:face 'lsp-java-treemacs-directory-face
:more-properties ,more-properties))
("FOLDER"
(treemacs-render-node :icon treemacs-icon-folder-closed
:label-form name
:state treemacs-folder-closed-state
:key-form node-path
:face 'lsp-java-treemacs-directory-face
:more-properties ,more-properties))
((or "CLASS_FILE" "FILE")
(treemacs-render-node :icon (treemacs-icon-for-file name)
:label-form name
:state treemacs-lsp-file-state
:key-form uri
:face 'lsp-java-treemacs-file-face
:more-properties ,more-properties))))))
(treemacs-define-expandable-node package
:icon-open lsp-java-treemacs-package-opened
:icon-closed lsp-java-treemacs-package
:query-function (lsp-java-treemacs--external-library-children
(button-get btn :project-uri)
(button-get btn :node-id)
(button-get btn :node-path))
:render-action (treemacs--lsp-node-or-folder))
(treemacs-define-expandable-node folder
:icon-open lsp-java-treemacs-jar-folder-opened
:icon-closed lsp-java-treemacs-jar-folder
:query-function (lsp-java-treemacs--external-library-children
(button-get btn :project-uri)
(button-get btn :node-id)
(button-get btn :node-path))
:render-action (treemacs--lsp-node-or-folder))
(treemacs-define-expandable-node jar-file
:icon-open lsp-java-treemacs-jar-opened
:icon-closed lsp-java-treemacs-jar
:query-function (lsp-java-treemacs--library-children (button-get btn :project-uri)
(button-get btn :key))
:render-action (treemacs--lsp-node-or-folder))
(treemacs-define-expandable-node external-library
:icon-open lsp-java-treemacs-library-folder-opened
:icon-closed lsp-java-treemacs-library-folder
:query-function (-> btn
(button-get :parent)
(button-get :path)
file-name-as-directory
lsp--path-to-uri
lsp-java-treemacs--get-libraries)
:root-label "External Libraries"
:root-marker t
:root-face 'lsp-java-treemacs-extension-root-face
:root-key-form (lsp--path-to-uri (button-get parent :path))
:render-action (-let ((project-uri (-> btn
(button-get :parent)
(button-get :path)
lsp--path-to-uri))
((&hash "name" "id") item))
(treemacs-render-node
:icon treemacs-icon-jar-file-closed
:label-form name
:state treemacs-jar-file-closed-state
:face 'lsp-java-treemacs-directory-face
:key-form id
:more-properties (:node-id id :project-uri project-uri
:workspace (lsp-java--find-workspace project-uri)))))
(defun lsp-java-treemacs--folders-change (added removed)
"Handler for `lsp-workspace-folders-change' hook.
ADDED and REMOVED are pointing which are the changed folders."
(--each added
(treemacs-do-add-project-to-workspace it (f-filename it)))
(--each removed
(-some->> (treemacs-current-workspace)
treemacs-workspace->projects
(-first (lambda (project) (f-equal? it (treemacs-project->path project))))
treemacs-do-remove-project-from-workspace)))
(defun lsp-java-treemacs--get-projects ()
"Get projects."
(or (when (functionp 'lsp-session)
(lsp-session-folders (lsp-session)))
(hash-table-keys lsp--workspaces)))
(defun lsp-java-treemacs-register ()
"Register `lsp-java' extension."
(interactive)
(treemacs-define-directory-extension
:extension 'treemacs-EXTERNAL-LIBRARY-extension
:position 'top
:predicate 'lsp-java-treemacs--is-root)
(treemacs-define-project-extension
:extension 'treemacs-EXTERNAL-LIBRARY-extension
:position 'top
:predicate 'lsp-java-treemacs--is-root)
(require 'treemacs)
(unless (eq 'visible (treemacs-current-visibility))
(treemacs))
(mapc (lambda (root-path)
(unless (or (s-equals? (f-canonical root-path) (f-canonical lsp-java-workspace-dir))
(s-equals? (f-canonical root-path) (f-canonical lsp-java-workspace-cache-dir)))
(treemacs-do-add-project-to-workspace root-path (f-filename root-path))))
(lsp-java-treemacs--get-projects))
(add-hook 'lsp-workspace-folders-change 'lsp-java-treemacs--folders-change))
(defun lsp-java-treemacs-unregister ()
"Unregister extension."
(interactive)
(remove-hook 'lsp-workspace-folders-change 'lsp-java-treemacs--folders-change)
(treemacs-remove-project-extension 'treemacs-EXTERNAL-LIBRARY-extension
'project-start)
(treemacs-remove-directory-extension 'treemacs-EXTERNAL-LIBRARY-extension
'directory-start))
(provide 'lsp-java-treemacs )
;;; lsp-java-treemacs.el ends here