lisp/net/newst-treeview.el

   1 ;;; newst-treeview.el --- Treeview frontend for newsticker.
   2
   3 ;; Copyright (C) 2008-2011 Free Software Foundation, Inc.
   4
   5 ;; Author:      Ulf Jasper <ulf.jasper@web.de>
   6 ;; Filename:    newst-treeview.el
   7 ;; URL:         http://www.nongnu.org/newsticker
   8 ;; Created:     2007
   9 ;; Keywords:    News, RSS, Atom
  10 ;; Time-stamp:  "6. Dezember 2009, 19:17:28 (ulf)"
  11 ;; Package:     newsticker
  12
  13 ;; ======================================================================
  14
  15 ;; This file is part of GNU Emacs.
  16
  17 ;; GNU Emacs is free software: you can redistribute it and/or modify
  18 ;; it under the terms of the GNU General Public License as published by
  19 ;; the Free Software Foundation, either version 3 of the License, or
  20 ;; (at your option) any later version.
  21
  22 ;; GNU Emacs is distributed in the hope that it will be useful,
  23 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  24 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25 ;; GNU General Public License for more details.
  26
  27 ;; You should have received a copy of the GNU General Public License
  28 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  29
  30 ;; ======================================================================
  31 ;;; Commentary:
  32
  33 ;; See newsticker.el
  34
  35 ;; ======================================================================
  36 ;;; History:
  37 ;;
  38
  39
  40 ;; ======================================================================
  41 ;;; Code:
  42 (require 'newst-reader)
  43 (require 'widget)
  44 (require 'tree-widget)
  45 (require 'wid-edit)
  46
  47 ;; ======================================================================
  48 ;;; Customization
  49 ;; ======================================================================
  50 (defgroup newsticker-treeview nil
  51   "Settings for the tree view reader."
  52   :group 'newsticker-reader)
  53
  54 (defface newsticker-treeview-face
  55   '((((class color) (background dark))
  56      (:family "helvetica" :foreground "misty rose" :bold nil))
  57     (((class color) (background light))
  58      (:family "helvetica" :foreground "black" :bold nil)))
  59   "Face for newsticker tree."
  60   :group 'newsticker-treeview)
  61
  62 (defface newsticker-treeview-new-face
  63   '((((class color) (background dark))
  64      (:inherit newsticker-treeview-face :bold t))
  65     (((class color) (background light))
  66      (:inherit newsticker-treeview-face :bold t)))
  67   "Face for newsticker tree."
  68   :group 'newsticker-treeview)
  69
  70 (defface newsticker-treeview-old-face
  71   '((((class color) (background dark))
  72      (:inherit newsticker-treeview-face))
  73     (((class color) (background light))
  74      (:inherit newsticker-treeview-face)))
  75   "Face for newsticker tree."
  76   :group 'newsticker-treeview)
  77
  78 (defface newsticker-treeview-immortal-face
  79   '((((class color) (background dark))
  80      (:inherit newsticker-treeview-face :foreground "orange" :italic t))
  81     (((class color) (background light))
  82      (:inherit newsticker-treeview-face :foreground "blue" :italic t)))
  83   "Face for newsticker tree."
  84   :group 'newsticker-treeview)
  85
  86 (defface newsticker-treeview-obsolete-face
  87   '((((class color) (background dark))
  88      (:inherit newsticker-treeview-face :strike-through t))
  89     (((class color) (background light))
  90      (:inherit newsticker-treeview-face :strike-through t)))
  91   "Face for newsticker tree."
  92   :group 'newsticker-treeview)
  93
  94 (defface newsticker-treeview-selection-face
  95   '((((class color) (background dark))
  96      (:background "#bbbbff"))
  97     (((class color) (background light))
  98      (:background "#bbbbff")))
  99   "Face for newsticker selection."
 100   :group 'newsticker-treeview)
 101
 102 (defcustom newsticker-treeview-own-frame
 103   nil
 104   "Decides whether newsticker treeview creates and uses its own frame."
 105   :type 'boolean
 106   :group 'newsticker-treeview)
 107
 108 (defcustom newsticker-treeview-treewindow-width
 109   30
 110   "Width of tree window in treeview layout.
 111 See also `newsticker-treeview-listwindow-height'."
 112   :type 'integer
 113   :group 'newsticker-treeview)
 114
 115 (defcustom newsticker-treeview-listwindow-height
 116   10
 117   "Height of list window in treeview layout.
 118 See also `newsticker-treeview-treewindow-width'."
 119   :type 'integer
 120   :group 'newsticker-treeview)
 121
 122 (defcustom newsticker-treeview-automatically-mark-displayed-items-as-old
 123   t
 124   "Decides whether to automatically mark displayed items as old.
 125 If t an item is marked as old as soon as it is displayed.  This
 126 applies to newsticker only."
 127   :type 'boolean
 128   :group 'newsticker-treeview)
 129
 130 (defvar newsticker-groups
 131   '("Feeds")
 132   "List of feed groups, used in the treeview frontend.
 133 First element is a string giving the group name.  Remaining
 134 elements are either strings giving a feed name or lists having
 135 the same structure as `newsticker-groups'. (newsticker-groups :=
 136 groupdefinition, groupdefinition := groupname groupcontent*,
 137 groupcontent := feedname | groupdefinition)
 138
 139 Example: (\"Topmost group\" \"feed1\" (\"subgroup1\" \"feed 2\")
 140 \"feed3\")")
 141
 142 (defcustom newsticker-groups-filename
 143   "~/.newsticker-groups"
 144   "Name of the newsticker groups settings file."
 145   :type 'string
 146   :group 'newsticker-treeview)
 147 (make-obsolete 'newsticker-groups-filename 'newsticker-dir "23.1")
 148
 149 ;; ======================================================================
 150 ;;; internal variables
 151 ;; ======================================================================
 152 (defvar newsticker--treeview-windows nil)
 153 (defvar newsticker--treeview-buffers nil)
 154 (defvar newsticker--treeview-current-feed nil
 155   "Feed name of currently shown item.")
 156 (defvar newsticker--treeview-current-vfeed nil)
 157 (defvar newsticker--treeview-list-show-feed nil)
 158 (defvar newsticker--saved-window-config nil)
 159 (defvar newsticker--selection-overlay nil
 160   "Highlight the selected tree node.")
 161 (defvar newsticker--tree-selection-overlay nil
 162   "Highlight the selected list item.")
 163 (defvar newsticker--frame nil "Special frame for newsticker windows.")
 164 (defvar newsticker--treeview-list-sort-order 'sort-by-time)
 165 (defvar newsticker--treeview-current-node-id nil)
 166 (defvar newsticker--treeview-current-tree nil)
 167 (defvar newsticker--treeview-feed-tree nil)
 168 (defvar newsticker--treeview-vfeed-tree nil)
 169
 170 ;; maps for the clickable portions
 171 (defvar newsticker--treeview-url-keymap
 172   (let ((map (make-sparse-keymap 'newsticker--treeview-url-keymap)))
 173     (define-key map [mouse-1] 'newsticker-treeview-mouse-browse-url)
 174     (define-key map [mouse-2] 'newsticker-treeview-mouse-browse-url)
 175     (define-key map "\n" 'newsticker-treeview-browse-url)
 176     (define-key map "\C-m" 'newsticker-treeview-browse-url)
 177     (define-key map [(control return)] 'newsticker-handle-url)
 178     map)
 179   "Key map for click-able headings in the newsticker treeview buffers.")
 180
 181
 182 ;; ======================================================================
 183 ;;; short cuts
 184 ;; ======================================================================
 185 (defsubst newsticker--treeview-tree-buffer ()
 186   "Return the tree buffer of the newsticker treeview."
 187   (nth 0 newsticker--treeview-buffers))
 188 (defsubst newsticker--treeview-list-buffer ()
 189   "Return the list buffer of the newsticker treeview."
 190   (nth 1 newsticker--treeview-buffers))
 191 (defsubst newsticker--treeview-item-buffer ()
 192   "Return the item buffer of the newsticker treeview."
 193   (nth 2 newsticker--treeview-buffers))
 194 (defsubst newsticker--treeview-tree-window ()
 195   "Return the tree window of the newsticker treeview."
 196   (nth 0 newsticker--treeview-windows))
 197 (defsubst newsticker--treeview-list-window ()
 198   "Return the list window of the newsticker treeview."
 199   (nth 1 newsticker--treeview-windows))
 200 (defsubst newsticker--treeview-item-window ()
 201   "Return the item window of the newsticker treeview."
 202   (nth 2 newsticker--treeview-windows))
 203
 204 ;; ======================================================================
 205 ;;; utility functions
 206 ;; ======================================================================
 207 (defun newsticker--treeview-get-id (parent i)
 208   "Create an id for a newsticker treeview node.
 209 PARENT is the node's parent, I is an integer."
 210   ;;(message "newsticker--treeview-get-id %s"
 211   ;;       (format "%s-%d" (widget-get parent :nt-id) i))
 212   (format "%s-%d" (widget-get parent :nt-id) i))
 213
 214 (defun newsticker--treeview-ids-eq (id1 id2)
 215   "Return non-nil if ids ID1 and ID2 are equal."
 216   ;;(message "%s/%s" (or id1 -1) (or id2 -1))
 217   (and id1 id2 (string= id1 id2)))
 218
 219 (defun newsticker--treeview-nodes-eq (node1 node2)
 220   "Compare treeview nodes NODE1 and NODE2 for equality.
 221 Nodes are equal if the have the same newsticker-id.  Note that
 222 during re-tagging and collapsing/expanding nodes change, while
 223 their id stays constant."
 224   (let ((id1 (widget-get node1 :nt-id))
 225         (id2 (widget-get node2 :nt-id)))
 226     ;;(message "%s/%s %s/%s" (widget-get node1 :tag) (widget-get node2 :tag)
 227     ;;       (or id1 -1) (or id2 -1))
 228     (or (newsticker--treeview-ids-eq id1 id2)
 229         (string= (widget-get node1 :tag) (widget-get node2 :tag)))))
 230
 231 (defun newsticker--treeview-do-get-node-of-feed (feed-name startnode)
 232    "Recursivly search node for feed FEED-NAME starting from STARTNODE."
 233    ;;(message "%s/%s" feed-name (widget-get startnode :nt-feed))
 234    (if (string= feed-name (or (widget-get startnode :nt-feed)
 235                               (widget-get startnode :nt-vfeed)))
 236        (throw 'found startnode)
 237      (let ((children (widget-get startnode :children)))
 238        (dolist (w children)
 239          (newsticker--treeview-do-get-node-of-feed feed-name w)))))
 240
 241 (defun newsticker--treeview-get-node-of-feed (feed-name)
 242   "Return node for feed FEED-NAME in newsticker treeview tree."
 243   (catch 'found
 244     (newsticker--treeview-do-get-node-of-feed feed-name
 245                                               newsticker--treeview-feed-tree)
 246     (newsticker--treeview-do-get-node-of-feed feed-name
 247                                               newsticker--treeview-vfeed-tree)))
 248
 249 (defun newsticker--treeview-do-get-node (id startnode)
 250    "Recursivly search node with ID starting from STARTNODE."
 251    (if (newsticker--treeview-ids-eq id (widget-get startnode :nt-id))
 252        (throw 'found startnode)
 253      (let ((children (widget-get startnode :children)))
 254        (dolist (w children)
 255          (newsticker--treeview-do-get-node id w)))))
 256
 257 (defun newsticker--treeview-get-node (id)
 258   "Return node with ID in newsticker treeview tree."
 259   (catch 'found
 260     (newsticker--treeview-do-get-node id newsticker--treeview-feed-tree)
 261     (newsticker--treeview-do-get-node id newsticker--treeview-vfeed-tree)))
 262
 263 (defun newsticker--treeview-get-current-node ()
 264   "Return current node in newsticker treeview tree."
 265   (newsticker--treeview-get-node newsticker--treeview-current-node-id))
 266
 267 ;; ======================================================================
 268
 269 (unless (fboundp 'declare-function) (defmacro declare-function (&rest r)))
 270 (declare-function w3m-toggle-inline-images "ext:w3m" (&optional force no-cache))
 271
 272 (defun newsticker--treeview-render-text (start end)
 273   "Render text between markers START and END."
 274   (if newsticker-html-renderer
 275       (condition-case error-data
 276           (save-excursion
 277             (set-marker-insertion-type end t)
 278             ;; check whether it is necessary to call html renderer
 279             ;; (regexp inspired by htmlr.el)
 280             (goto-char start)
 281             (when (re-search-forward
 282                    "</?[A-Za-z1-6]*\\|&#?[A-Za-z0-9]+;" end t)
 283               ;; (message "%s" (newsticker--title item))
 284               (let ((w3m-fill-column (if newsticker-use-full-width
 285                                          -1 fill-column))
 286                     (w3-maximum-line-length
 287                      (if newsticker-use-full-width nil fill-column)))
 288                 (save-excursion
 289                   (funcall newsticker-html-renderer start end)))
 290               ;;(cond ((eq newsticker-html-renderer 'w3m-region)
 291               ;;     (add-text-properties start end (list 'keymap
 292               ;;                                        w3m-minor-mode-map)))
 293               ;;((eq newsticker-html-renderer 'w3-region)
 294               ;;(add-text-properties start end (list 'keymap w3-mode-map))))
 295               (if (eq newsticker-html-renderer 'w3m-region)
 296                   (w3m-toggle-inline-images t))
 297               t))
 298         (error
 299          (message "Error: HTML rendering failed: %s, %s"
 300                   (car error-data) (cdr error-data))
 301          nil))
 302     nil))
 303
 304 ;; ======================================================================
 305 ;;; List window
 306 ;; ======================================================================
 307 (defun newsticker--treeview-list-add-item (item feed &optional show-feed)
 308   "Add news ITEM for FEED to newsticker treeview list window.
 309 If string SHOW-FEED is non-nil it is shown in the item string."
 310   (setq newsticker--treeview-list-show-feed show-feed)
 311   (with-current-buffer (newsticker--treeview-list-buffer)
 312     (let* ((inhibit-read-only t)
 313            pos1 pos2)
 314       (goto-char (point-max))
 315       (setq pos1 (point-marker))
 316       (insert " ")
 317       (insert (propertize " " 'display '(space :align-to 2)))
 318       (insert (if show-feed
 319                   (concat
 320                    (substring
 321                     (format "%-10s" (newsticker--real-feed-name
 322                                      feed))
 323                     0 10)
 324                    (propertize " " 'display '(space :align-to 12)))
 325                 ""))
 326       (insert (format-time-string "%d.%m.%y, %H:%M"
 327                                   (newsticker--time item)))
 328       (insert (propertize " " 'display
 329                           (list 'space :align-to (if show-feed 28 18))))
 330       (setq pos2 (point-marker))
 331       (insert (newsticker--title item))
 332       (insert "\n")
 333       (newsticker--treeview-render-text pos2 (point-marker))
 334       (goto-char pos2)
 335       (while (search-forward "\n" nil t)
 336         (replace-match " "))
 337       (let ((map (make-sparse-keymap)))
 338         (define-key map [mouse-1] 'newsticker-treeview-tree-click)
 339         (define-key map "\n" 'newsticker-treeview-show-item)
 340         (define-key map "\C-m" 'newsticker-treeview-show-item)
 341         (add-text-properties pos1 (point-max)
 342                              (list :nt-item item
 343                                    :nt-feed feed
 344                                    :nt-link (newsticker--link item)
 345                                    'mouse-face 'highlight
 346                                    'keymap map
 347                                    'help-echo (buffer-substring pos2
 348                                                                 (point-max)))))
 349       (insert "\n"))))
 350
 351 (defun newsticker--treeview-list-clear ()
 352   "Clear the newsticker treeview list window."
 353   (with-current-buffer (newsticker--treeview-list-buffer)
 354     (let ((inhibit-read-only t))
 355       (erase-buffer)
 356       (kill-all-local-variables)
 357       (remove-overlays))))
 358
 359 (defun newsticker--treeview-list-items-with-age-callback (widget
 360                                                           changed-widget
 361                                                           &rest ages)
 362   "Fill newsticker treeview list window with items of certain age.
 363 This is a callback function for the treeview nodes.
 364 Argument WIDGET is the calling treeview widget.
 365 Argument CHANGED-WIDGET is the widget that actually has changed.
 366 Optional argument AGES is the list of ages that are to be shown."
 367   (newsticker--treeview-list-clear)
 368   (widget-put widget :nt-selected t)
 369   (apply 'newsticker--treeview-list-items-with-age ages))
 370
 371 (defun newsticker--treeview-list-items-with-age (&rest ages)
 372   "Actually fill newsticker treeview list window with items of certain age.
 373 AGES is the list of ages that are to be shown."
 374   (mapc (lambda (feed)
 375           (let ((feed-name-symbol (intern (car feed))))
 376             (mapc (lambda (item)
 377                     (when (memq (newsticker--age item) ages)
 378                       (newsticker--treeview-list-add-item
 379                        item feed-name-symbol t)))
 380                   (newsticker--treeview-list-sort-items
 381                    (cdr (newsticker--cache-get-feed feed-name-symbol))))))
 382         (append newsticker-url-list-defaults newsticker-url-list))
 383   (newsticker--treeview-list-update nil))
 384
 385 (defun newsticker--treeview-list-new-items (widget changed-widget
 386                                                    &optional event)
 387   "Fill newsticker treeview list window with new items.
 388 This is a callback function for the treeview nodes.
 389 Argument WIDGET is the calling treeview widget.
 390 Argument CHANGED-WIDGET is the widget that actually has changed.
 391 Optional argument EVENT is the mouse event that triggered this action."
 392   (newsticker--treeview-list-items-with-age-callback widget changed-widget
 393                                                      'new)
 394   (newsticker--treeview-item-show-text
 395    "New items"
 396    "This is a virtual feed containing all new items"))
 397
 398 (defun newsticker--treeview-list-immortal-items (widget changed-widget
 399                                                         &optional event)
 400   "Fill newsticker treeview list window with immortal items.
 401 This is a callback function for the treeview nodes.
 402 Argument WIDGET is the calling treeview widget.
 403 Argument CHANGED-WIDGET is the widget that actually has changed.
 404 Optional argument EVENT is the mouse event that triggered this action."
 405   (newsticker--treeview-list-items-with-age-callback widget changed-widget
 406                                                      'immortal)
 407   (newsticker--treeview-item-show-text
 408    "Immortal items"
 409    "This is a virtual feed containing all immortal items."))
 410
 411 (defun newsticker--treeview-list-obsolete-items (widget changed-widget
 412                                                         &optional event)
 413   "Fill newsticker treeview list window with obsolete items.
 414 This is a callback function for the treeview nodes.
 415 Argument WIDGET is the calling treeview widget.
 416 Argument CHANGED-WIDGET is the widget that actually has changed.
 417 Optional argument EVENT is the mouse event that triggered this action."
 418   (newsticker--treeview-list-items-with-age-callback widget changed-widget
 419                                                      'obsolete)
 420   (newsticker--treeview-item-show-text
 421    "Obsolete items"
 422    "This is a virtual feed containing all obsolete items."))
 423
 424 (defun newsticker--treeview-list-all-items (widget changed-widget
 425                                                    &optional event)
 426   "Fill newsticker treeview list window with all items.
 427 This is a callback function for the treeview nodes.
 428 Argument WIDGET is the calling treeview widget.
 429 Argument CHANGED-WIDGET is the widget that actually has changed.
 430 Optional argument EVENT is the mouse event that triggered this action."
 431   (newsticker--treeview-list-items-with-age-callback widget changed-widget
 432                                                      event 'new 'old
 433                                                      'obsolete 'immortal)
 434   (newsticker--treeview-item-show-text
 435    "All items"
 436    "This is a virtual feed containing all items."))
 437
 438 (defun newsticker--treeview-list-items-v (vfeed-name)
 439   "List items for virtual feed VFEED-NAME."
 440   (when vfeed-name
 441     (cond ((string-match "\\*new\\*" vfeed-name)
 442            (newsticker--treeview-list-items-with-age 'new))
 443           ((string-match "\\*immortal\\*" vfeed-name)
 444            (newsticker--treeview-list-items-with-age 'immortal))
 445           ((string-match "\\*old\\*" vfeed-name)
 446            (newsticker--treeview-list-items-with-age 'old nil)))
 447     (newsticker--treeview-list-update nil)
 448     ))
 449
 450 (defun newsticker--treeview-list-items (feed-name)
 451   "List items for feed FEED-NAME."
 452   (when feed-name
 453     (if (newsticker--treeview-virtual-feed-p feed-name)
 454         (newsticker--treeview-list-items-v feed-name)
 455       (mapc (lambda (item)
 456               (if (eq (newsticker--age item) 'feed)
 457                   (newsticker--treeview-item-show item (intern feed-name))
 458                 (newsticker--treeview-list-add-item item
 459                                                     (intern feed-name))))
 460             (newsticker--treeview-list-sort-items
 461              (cdr (newsticker--cache-get-feed (intern feed-name)))))
 462       (newsticker--treeview-list-update nil))))
 463
 464 (defun newsticker--treeview-list-feed-items (widget changed-widget
 465                                                     &optional event)
 466   "Callback function for listing feed items.
 467 Argument WIDGET is the calling treeview widget.
 468 Argument CHANGED-WIDGET is the widget that actually has changed.
 469 Optional argument EVENT is the mouse event that triggered this action."
 470   (newsticker--treeview-list-clear)
 471   (widget-put widget :nt-selected t)
 472   (let ((feed-name (widget-get widget :nt-feed))
 473         (vfeed-name (widget-get widget :nt-vfeed)))
 474     (if feed-name
 475         (newsticker--treeview-list-items feed-name)
 476       (newsticker--treeview-list-items-v vfeed-name))))
 477
 478 (defun newsticker--treeview-list-compare-item-by-age (item1 item2)
 479   "Compare two news items ITEM1 and ITEM2 wrt age."
 480   (catch 'result
 481     (let ((age1 (newsticker--age item1))
 482           (age2 (newsticker--age item2)))
 483       (cond ((eq age1 'new)
 484              t)
 485             ((eq age1 'immortal)
 486              (cond ((eq age2 'new)
 487                     t)
 488                    ((eq age2 'immortal)
 489                     t)
 490                    (t
 491                     nil)))
 492             ((eq age1 'old)
 493              (cond ((eq age2 'new)
 494                     nil)
 495                    ((eq age2 'immortal)
 496                     nil)
 497                    ((eq age2 'old)
 498                     nil)
 499                    (t
 500                     t)))
 501             (t
 502              nil)))))
 503
 504 (defun newsticker--treeview-list-compare-item-by-age-reverse (item1 item2)
 505   "Compare two news items ITEM1 and ITEM2 wrt age in reverse order."
 506   (newsticker--treeview-list-compare-item-by-age item2 item1))
 507
 508 (defun newsticker--treeview-list-compare-item-by-time (item1 item2)
 509   "Compare two news items ITEM1 and ITEM2 wrt time values."
 510   (newsticker--cache-item-compare-by-time item1 item2))
 511
 512 (defun newsticker--treeview-list-compare-item-by-time-reverse (item1 item2)
 513   "Compare two news items ITEM1 and ITEM2 wrt time values in reverse order."
 514   (newsticker--cache-item-compare-by-time item2 item1))
 515
 516 (defun newsticker--treeview-list-compare-item-by-title (item1 item2)
 517   "Compare two news items ITEM1 and ITEM2 wrt title."
 518   (newsticker--cache-item-compare-by-title item1 item2))
 519
 520 (defun newsticker--treeview-list-compare-item-by-title-reverse (item1 item2)
 521   "Compare two news items ITEM1 and ITEM2 wrt title in reverse order."
 522   (newsticker--cache-item-compare-by-title item2 item1))
 523
 524 (defun newsticker--treeview-list-sort-items (items)
 525   "Return sorted copy of list ITEMS.
 526 The sort function is chosen according to the value of
 527 `newsticker--treeview-list-sort-order'."
 528   (let ((sort-fun
 529          (cond ((eq newsticker--treeview-list-sort-order 'sort-by-age)
 530                 'newsticker--treeview-list-compare-item-by-age)
 531                ((eq newsticker--treeview-list-sort-order
 532                     'sort-by-age-reverse)
 533                 'newsticker--treeview-list-compare-item-by-age-reverse)
 534                ((eq newsticker--treeview-list-sort-order 'sort-by-time)
 535                 'newsticker--treeview-list-compare-item-by-time)
 536                ((eq newsticker--treeview-list-sort-order
 537                     'sort-by-time-reverse)
 538                 'newsticker--treeview-list-compare-item-by-time-reverse)
 539                ((eq newsticker--treeview-list-sort-order 'sort-by-title)
 540                 'newsticker--treeview-list-compare-item-by-title)
 541                ((eq newsticker--treeview-list-sort-order
 542                     'sort-by-title-reverse)
 543                 'newsticker--treeview-list-compare-item-by-title-reverse)
 544                (t
 545                 'newsticker--treeview-list-compare-item-by-title))))
 546     (sort (copy-sequence items) sort-fun)))
 547
 548 (defun newsticker--treeview-list-update-faces ()
 549   "Update faces in the treeview list buffer."
 550   (let (pos-sel)
 551     (with-current-buffer (newsticker--treeview-list-buffer)
 552       (save-excursion
 553         (let ((inhibit-read-only t))
 554           (goto-char (point-min))
 555           (while (not (eobp))
 556             (let* ((pos (point-at-eol))
 557                    (item (get-text-property (point) :nt-item))
 558                    (age (newsticker--age item))
 559                    (selected (get-text-property (point) :nt-selected))
 560                    (face (cond ((eq age 'new)
 561                                 'newsticker-treeview-new-face)
 562                                ((eq age 'old)
 563                                 'newsticker-treeview-old-face)
 564                                ((eq age 'immortal)
 565                                 'newsticker-treeview-immortal-face)
 566                                ((eq age 'obsolete)
 567                                 'newsticker-treeview-obsolete-face)
 568                                (t
 569                                 'bold))))
 570               (put-text-property (point) pos 'face face)
 571               (if selected
 572                   (move-overlay newsticker--selection-overlay (point)
 573                                 (1+ pos) ;include newline
 574                                 (current-buffer)))
 575               (if selected (setq pos-sel (point)))
 576               (forward-line 1)
 577               (beginning-of-line)))))) ;; FIXME!?
 578     (when pos-sel
 579       (if (window-live-p (newsticker--treeview-list-window))
 580           (set-window-point (newsticker--treeview-list-window) pos-sel)))))
 581
 582 (defun newsticker--treeview-list-clear-highlight ()
 583   "Clear the highlight in the treeview list buffer."
 584   (with-current-buffer (newsticker--treeview-list-buffer)
 585     (let ((inhibit-read-only t))
 586       (put-text-property (point-min) (point-max) :nt-selected nil))
 587     (newsticker--treeview-list-update-faces)))
 588
 589 (defun newsticker--treeview-list-update-highlight ()
 590   "Update the highlight in the treeview list buffer."
 591   (newsticker--treeview-list-clear-highlight)
 592     (let (pos num-lines)
 593       (with-current-buffer (newsticker--treeview-list-buffer)
 594         (let ((inhibit-read-only t))
 595           (put-text-property (point-at-bol) (point-at-eol) :nt-selected t))
 596         (newsticker--treeview-list-update-faces))))
 597
 598 (defun newsticker--treeview-list-highlight-start ()
 599   "Return position of selection in treeview list buffer."
 600   (with-current-buffer (newsticker--treeview-list-buffer)
 601     (save-excursion
 602       (goto-char (point-min))
 603       (next-single-property-change (point) :nt-selected))))
 604
 605 (defun newsticker--treeview-list-update (clear-buffer)
 606   "Update the faces and highlight in the treeview list buffer.
 607 If CLEAR-BUFFER is non-nil the list buffer is completely erased."
 608   (save-excursion
 609     (if (window-live-p (newsticker--treeview-list-window))
 610         (set-window-buffer (newsticker--treeview-list-window)
 611                            (newsticker--treeview-list-buffer)))
 612     (set-buffer (newsticker--treeview-list-buffer))
 613     (if clear-buffer
 614         (let ((inhibit-read-only t))
 615           (erase-buffer)))
 616     (newsticker-treeview-list-mode)
 617     (newsticker--treeview-list-update-faces)
 618     (goto-char (point-min))))
 619
 620 (defvar newsticker-treeview-list-sort-button-map
 621   (let ((map (make-sparse-keymap)))
 622     (define-key map [header-line mouse-1]
 623       'newsticker--treeview-list-sort-by-column)
 624     (define-key map [header-line mouse-2]
 625       'newsticker--treeview-list-sort-by-column)
 626     map)
 627   "Local keymap for newsticker treeview list window sort buttons.")
 628
 629 (defun newsticker--treeview-list-sort-by-column (&optional event)
 630   "Sort the newsticker list window buffer by the column clicked on.
 631 Optional argument EVENT is the mouse event that triggered this action."
 632   (interactive (list last-input-event))
 633   (if event (mouse-select-window event))
 634   (let* ((pos (event-start event))
 635          (obj (posn-object pos))
 636          (sort-order (if obj
 637                       (get-text-property (cdr obj) 'sort-order (car obj))
 638                     (get-text-property (posn-point pos) 'sort-order))))
 639     (setq newsticker--treeview-list-sort-order
 640           (cond ((eq sort-order 'sort-by-age)
 641                  (if (eq newsticker--treeview-list-sort-order 'sort-by-age)
 642                      'sort-by-age-reverse
 643                    'sort-by-age))
 644                 ((eq sort-order 'sort-by-time)
 645                  (if (eq newsticker--treeview-list-sort-order 'sort-by-time)
 646                      'sort-by-time-reverse
 647                    'sort-by-time))
 648                 ((eq sort-order 'sort-by-title)
 649                  (if (eq newsticker--treeview-list-sort-order 'sort-by-title)
 650                      'sort-by-title-reverse
 651                    'sort-by-title))))
 652     (newsticker-treeview-update)))
 653
 654 (defun newsticker-treeview-list-make-sort-button (name sort-order)
 655   "Create propertized string for headerline button.
 656 NAME is the button text, SORT-ORDER is the associated sort order
 657 for the button."
 658   (let ((face (if (string-match (symbol-name sort-order)
 659                                 (symbol-name
 660                                  newsticker--treeview-list-sort-order))
 661                   'bold
 662                 'header-line)))
 663     (propertize name
 664                 'sort-order sort-order
 665                 'help-echo (concat "Sort by " name)
 666                 'mouse-face 'highlight
 667                 'face face
 668                 'keymap newsticker-treeview-list-sort-button-map)))
 669
 670 (defun newsticker--treeview-list-select (item)
 671   "Select ITEM in treeview's list buffer."
 672   (newsticker--treeview-list-clear-highlight)
 673     (let (pos num-lines)
 674       (save-current-buffer
 675         (set-buffer (newsticker--treeview-list-buffer))
 676         (goto-char (point-min))
 677         (catch 'found
 678           (while t
 679             (let ((it (get-text-property (point) :nt-item)))
 680               (when (eq it item)
 681                 (newsticker--treeview-list-update-highlight)
 682                 (newsticker--treeview-list-update-faces)
 683                 (newsticker--treeview-item-show
 684                  item (get-text-property (point) :nt-feed))
 685                 (throw 'found t)))
 686             (forward-line 1)
 687             (when (eobp)
 688               (goto-char (point-min))
 689               (throw 'found nil)))))))
 690
 691 ;; ======================================================================
 692 ;;; item window
 693 ;; ======================================================================
 694 (defun newsticker--treeview-item-show-text (title description)
 695   "Show text in treeview item buffer consisting of TITLE and DESCRIPTION."
 696   (with-current-buffer (newsticker--treeview-item-buffer)
 697     (when (fboundp 'w3m-process-stop)
 698       (w3m-process-stop (current-buffer)))
 699     (let ((inhibit-read-only t))
 700       (erase-buffer)
 701       (kill-all-local-variables)
 702       (remove-overlays)
 703       (insert title)
 704       (put-text-property (point-min) (point) 'face 'newsticker-feed-face)
 705       (insert "\n\n" description)
 706       (when newsticker-justification
 707         (fill-region (point-min) (point-max) newsticker-justification))
 708       (newsticker-treeview-item-mode)
 709       (goto-char (point-min)))))
 710
 711 (defun newsticker--treeview-item-show (item feed-name-symbol)
 712   "Show news ITEM coming from FEED-NAME-SYMBOL in treeview item buffer."
 713   (setq newsticker--treeview-current-feed (symbol-name feed-name-symbol))
 714   (with-current-buffer (newsticker--treeview-item-buffer)
 715     (when (fboundp 'w3m-process-stop)
 716       (w3m-process-stop (current-buffer)))
 717     (let ((inhibit-read-only t)
 718           (is-rendered-HTML nil)
 719           pos
 720           (marker1 (make-marker))
 721           (marker2 (make-marker)))
 722       (erase-buffer)
 723       (kill-all-local-variables)
 724       (remove-overlays)
 725
 726       (when (and item feed-name-symbol)
 727         (let ((wwidth (1- (window-width (newsticker--treeview-item-window)))))
 728           (if newsticker-use-full-width
 729               (set (make-local-variable 'fill-column) wwidth))
 730           (set (make-local-variable 'fill-column) (min fill-column
 731                                                        wwidth)))
 732         (let ((desc (newsticker--desc item)))
 733           (insert "\n" (or desc "[No Description]")))
 734         (set-marker marker1 (1+ (point-min)))
 735         (set-marker marker2 (point-max))
 736         (setq is-rendered-HTML (newsticker--treeview-render-text marker1
 737                                                                  marker2))
 738         (when (and newsticker-justification
 739                    (not is-rendered-HTML))
 740           (fill-region marker1 marker2 newsticker-justification))
 741
 742         (newsticker-treeview-item-mode)
 743         (goto-char (point-min))
 744         ;; insert logo at top
 745         (let* ((newsticker-enable-logo-manipulations nil)
 746                (img (newsticker--image-read feed-name-symbol nil)))
 747           (if (and (display-images-p) img)
 748               (newsticker--insert-image img (car item))
 749             (insert (newsticker--real-feed-name feed-name-symbol))))
 750         (add-text-properties (point-min) (point)
 751                              (list 'face 'newsticker-feed-face
 752                                    'mouse-face 'highlight
 753                                    'help-echo "Visit in web browser."
 754                                    :nt-link (newsticker--link item)
 755                                    'keymap newsticker--treeview-url-keymap))
 756         (setq pos (point))
 757
 758         (insert "\n\n")
 759         ;; insert title
 760         (setq pos (point))
 761         (insert (newsticker--title item) "\n")
 762         (set-marker marker1 pos)
 763         (set-marker marker2 (point))
 764         (newsticker--treeview-render-text marker1 marker2)
 765         (put-text-property pos (point) 'face 'newsticker-treeview-new-face)
 766         (goto-char marker2)
 767         (delete-char -1)
 768         (insert "\n")
 769         (put-text-property marker2 (point) 'face 'newsticker-treeview-face)
 770         (set-marker marker2 (point))
 771         (when newsticker-justification
 772           (fill-region marker1 marker2 newsticker-justification))
 773         (goto-char marker2)
 774         (add-text-properties marker1 (1- (point))
 775                              (list 'mouse-face 'highlight
 776                                    'help-echo "Visit in web browser."
 777                                    :nt-link (newsticker--link item)
 778                                    'keymap newsticker--treeview-url-keymap))
 779         (insert (format-time-string newsticker-date-format
 780                                     (newsticker--time item)))
 781         (insert "\n")
 782         (setq pos (point))
 783         (insert "\n")
 784         ;; insert enclosures and rest at bottom
 785         (goto-char (point-max))
 786         (insert "\n\n")
 787         (setq pos (point))
 788         (newsticker--insert-enclosure item newsticker--treeview-url-keymap)
 789         (put-text-property pos (point) 'face 'newsticker-enclosure-face)
 790         (setq pos (point))
 791         (insert "\n")
 792         (newsticker--print-extra-elements item newsticker--treeview-url-keymap)
 793         (put-text-property pos (point) 'face 'newsticker-extra-face)
 794         (goto-char (point-min)))))
 795   (if (and newsticker-treeview-automatically-mark-displayed-items-as-old
 796            item
 797            (memq (newsticker--age item) '(new obsolete)))
 798       (let ((newsticker-treeview-automatically-mark-displayed-items-as-old nil))
 799         (newsticker-treeview-mark-item-old t)
 800         (newsticker--treeview-list-update-faces)))
 801   (if (window-live-p (newsticker--treeview-item-window))
 802       (set-window-point (newsticker--treeview-item-window) 1)))
 803
 804 (defun newsticker--treeview-item-update ()
 805   "Update the treeview item buffer and window."
 806   (save-excursion
 807     (if (window-live-p (newsticker--treeview-item-window))
 808         (set-window-buffer (newsticker--treeview-item-window)
 809                            (newsticker--treeview-item-buffer)))
 810     (set-buffer (newsticker--treeview-item-buffer))
 811     (let ((inhibit-read-only t))
 812       (erase-buffer))
 813     (newsticker-treeview-item-mode)))
 814
 815 ;; ======================================================================
 816 ;;; Tree window
 817 ;; ======================================================================
 818 (defun newsticker--treeview-tree-expand (tree)
 819   "Expand TREE.
 820 Callback function for tree widget that adds nodes for feeds and subgroups."
 821   (tree-widget-set-theme "folder")
 822   (let ((group (widget-get tree :nt-group))
 823         (i 0)
 824         (nt-id ""))
 825     (mapcar (lambda (g)
 826               (setq nt-id (newsticker--treeview-get-id tree i))
 827               (setq i (1+ i))
 828               (if (listp g)
 829                   (let* ((g-name (car g)))
 830                     `(tree-widget
 831                       :tag ,(newsticker--treeview-tree-get-tag g-name nil nt-id)
 832                       :expander newsticker--treeview-tree-expand
 833                       :expander-p (lambda (&rest ignore) t)
 834                       :nt-group ,(cdr g)
 835                       :nt-feed ,g-name
 836                       :nt-id ,nt-id
 837                       :keep (:nt-feed :num-new :nt-id :open);;  :nt-group
 838                       :open nil))
 839                 (let ((tag (newsticker--treeview-tree-get-tag g nil nt-id)))
 840                 `(item :tag ,tag
 841                        :leaf-icon newsticker--tree-widget-leaf-icon
 842                        :nt-feed ,g
 843                        :action newsticker--treeview-list-feed-items
 844                        :nt-id ,nt-id
 845                        :keep (:nt-id)
 846                        :open t))))
 847             group)))
 848
 849 (defun newsticker--treeview-tree-expand-status (tree &optional changed-widget
 850                                                      event)
 851   "Expand the vfeed TREE.
 852 Optional arguments CHANGED-WIDGET and EVENT are ignored."
 853   (tree-widget-set-theme "folder")
 854   (list `(item :tag ,(newsticker--treeview-tree-get-tag nil "new")
 855                :nt-vfeed "new"
 856                :action newsticker--treeview-list-new-items
 857                :nt-id ,(newsticker--treeview-get-id tree 0)
 858                :keep (:nt-id))
 859         `(item :tag ,(newsticker--treeview-tree-get-tag nil "immortal")
 860                :nt-vfeed "immortal"
 861                :action newsticker--treeview-list-immortal-items
 862                :nt-id ,(newsticker--treeview-get-id tree 1)
 863                :keep (:nt-id))
 864         `(item :tag  ,(newsticker--treeview-tree-get-tag nil "obsolete")
 865                :nt-vfeed "obsolete"
 866                :action newsticker--treeview-list-obsolete-items
 867                :nt-id ,(newsticker--treeview-get-id tree 2)
 868                :keep (:nt-id))
 869         `(item :tag ,(newsticker--treeview-tree-get-tag nil "all")
 870                :nt-vfeed "all"
 871                :action newsticker--treeview-list-all-items
 872                :nt-id ,(newsticker--treeview-get-id tree 3)
 873                :keep (:nt-id))))
 874
 875 (defun newsticker--treeview-virtual-feed-p (feed-name)
 876   "Return non-nil if FEED-NAME is a virtual feed."
 877   (string-match "\\*.*\\*" feed-name))
 878
 879 (define-widget 'newsticker--tree-widget-leaf-icon 'tree-widget-icon
 880   "Icon for a tree-widget leaf node."
 881   :tag        "O"
 882   :glyph-name "leaf"
 883   :button-face 'default)
 884
 885 (defun newsticker--treeview-tree-update ()
 886   "Update treeview tree buffer and window."
 887   (save-excursion
 888     (if (window-live-p (newsticker--treeview-tree-window))
 889         (set-window-buffer (newsticker--treeview-tree-window)
 890                            (newsticker--treeview-tree-buffer)))
 891     (set-buffer (newsticker--treeview-tree-buffer))
 892     (kill-all-local-variables)
 893     (let ((inhibit-read-only t))
 894       (erase-buffer)
 895       (tree-widget-set-theme "folder")
 896       (setq newsticker--treeview-feed-tree
 897             (widget-create 'tree-widget
 898                            :tag (newsticker--treeview-propertize-tag
 899                                  "Feeds" 0 "feeds")
 900                            :expander 'newsticker--treeview-tree-expand
 901                            :expander-p (lambda (&rest ignore) t)
 902                            :leaf-icon 'newsticker--tree-widget-leaf-icon
 903                            :nt-group (cdr newsticker-groups)
 904                            :nt-id "feeds"
 905                            :keep '(:nt-id)
 906                            :open t))
 907       (setq newsticker--treeview-vfeed-tree
 908             (widget-create 'tree-widget
 909                            :tag (newsticker--treeview-propertize-tag
 910                                  "Virtual Feeds" 0 "vfeeds")
 911                            :expander 'newsticker--treeview-tree-expand-status
 912                            :expander-p (lambda (&rest ignore) t)
 913                            :leaf-icon 'newsticker--tree-widget-leaf-icon
 914                            :nt-id "vfeeds"
 915                            :keep '(:nt-id)
 916                            :open t))
 917       (use-local-map widget-keymap)
 918       (widget-setup))
 919     (newsticker-treeview-mode)))
 920
 921 (defun newsticker--treeview-propertize-tag (tag &optional num-new nt-id feed
 922                                                 vfeed)
 923   "Return propertized copy of string TAG.
 924 Optional argument NUM-NEW is used for choosing face, other
 925 arguments NT-ID, FEED, and VFEED are added as properties."
 926   ;;(message "newsticker--treeview-propertize-tag '%s' %s" feed nt-id)
 927   (let ((face 'newsticker-treeview-face)
 928         (map (make-sparse-keymap)))
 929     (if (and num-new (> num-new 0))
 930         (setq face 'newsticker-treeview-new-face))
 931     (define-key map [mouse-1] 'newsticker-treeview-tree-click)
 932     (define-key map "\n" 'newsticker-treeview-tree-do-click)
 933     (define-key map "\C-m" 'newsticker-treeview-tree-do-click)
 934     (propertize tag 'face face 'keymap map
 935                 :nt-id nt-id
 936                 :nt-feed feed
 937                 :nt-vfeed vfeed
 938                 'help-echo tag
 939                 'mouse-face 'highlight)))
 940
 941 (defun newsticker--treeview-tree-get-tag (feed-name vfeed-name
 942                                                     &optional nt-id)
 943   "Return a tag string for either FEED-NAME or, if it is nil, for VFEED-NAME.
 944 Optional argument NT-ID is added to the tag's properties."
 945   (let (tag (num-new 0))
 946     (cond (vfeed-name
 947            (cond ((string= vfeed-name "new")
 948                   (setq num-new (newsticker--stat-num-items-total 'new))
 949                   (setq tag (format "New items (%d)" num-new)))
 950                  ((string= vfeed-name "immortal")
 951                   (setq num-new (newsticker--stat-num-items-total 'immortal))
 952                   (setq tag (format "Immortal items (%d)" num-new)))
 953                  ((string= vfeed-name "obsolete")
 954                   (setq num-new (newsticker--stat-num-items-total 'obsolete))
 955                   (setq tag (format "Obsolete items (%d)" num-new)))
 956                  ((string= vfeed-name "all")
 957                   (setq num-new (newsticker--stat-num-items-total))
 958                   (setq tag (format "All items (%d)" num-new)))))
 959           (feed-name
 960            (setq num-new (newsticker--stat-num-items-for-group
 961                           (intern feed-name) 'new 'immortal))
 962            (setq tag
 963                  (format "%s (%d)"
 964                          (newsticker--real-feed-name (intern feed-name))
 965                          num-new))))
 966     (if tag
 967         (newsticker--treeview-propertize-tag tag num-new
 968                                              nt-id
 969                                              feed-name vfeed-name))))
 970
 971 (defun newsticker--stat-num-items-for-group (feed-name-symbol &rest ages)
 972   "Count number of items in feed FEED-NAME-SYMBOL that have an age matching AGES."
 973   ;;(message "newsticker--stat-num-items-for-group %s %s" feed-name-symbol ages)
 974   (let ((result (apply 'newsticker--stat-num-items feed-name-symbol ages)))
 975     (mapc (lambda (f-n)
 976             (setq result (+ result
 977                             (apply 'newsticker--stat-num-items (intern f-n)
 978                                    ages))))
 979           (newsticker--group-get-feeds
 980            (newsticker--group-get-group (symbol-name feed-name-symbol)) t))
 981     result))
 982
 983 (defun newsticker--treeview-count-node-items (feed &optional isvirtual)
 984   "Count number of relevant items for a treeview node.
 985 FEED gives the name of the feed or group.  If ISVIRTUAL is non-nil
 986 the feed is a virtual feed."
 987   (let* ((num-new 0))
 988     (if feed
 989         (if isvirtual
 990             (cond ((string= feed "new")
 991                    (setq num-new (newsticker--stat-num-items-total 'new)))
 992                   ((string= feed "immortal")
 993                    (setq num-new (newsticker--stat-num-items-total 'immortal)))
 994                   ((string= feed "obsolete")
 995                    (setq num-new (newsticker--stat-num-items-total 'obsolete)))
 996                   ((string= feed "all")
 997                    (setq num-new (newsticker--stat-num-items-total))))
 998           (setq num-new (newsticker--stat-num-items-for-group
 999                          (intern feed) 'new 'immortal))))
1000     num-new))
1001
1002 (defun newsticker--treeview-tree-update-tag (w &optional recursive
1003                                                &rest ignore)
1004   "Update tag for tree widget W.
1005 If RECURSIVE is non-nil recursively update parent widgets as
1006 well.  Argument IGNORE is ignored.  Note that this function, if
1007 called recursively, makes w invalid.  You should keep w's nt-id in
1008 that case."
1009   (let* ((parent (widget-get w :parent))
1010          (feed (or (widget-get w :nt-feed) (widget-get parent :nt-feed)))
1011          (vfeed (or (widget-get w :nt-vfeed) (widget-get parent :nt-vfeed)))
1012          (nt-id (or (widget-get w :nt-id) (widget-get parent :nt-id)))
1013          (num-new (newsticker--treeview-count-node-items (or feed vfeed)
1014                                                          vfeed))
1015          (tag (newsticker--treeview-tree-get-tag feed vfeed nt-id))
1016          (n (widget-get w :node)))
1017     (if parent
1018         (if recursive
1019             (newsticker--treeview-tree-update-tag parent)))
1020     (when tag
1021       (when n
1022         (widget-put n :tag tag))
1023       (widget-put w :num-new num-new)
1024       (widget-put w :tag tag)
1025       (when (marker-position (widget-get w :from))
1026         (let ((p (point))
1027               (notify (widget-get w :notify)))
1028           ;; FIXME: This moves point!!!!
1029           (with-current-buffer (newsticker--treeview-tree-buffer)
1030             (widget-value-set w (widget-value w)))
1031           (goto-char p))))))
1032
1033 (defun newsticker--treeview-tree-do-update-tags (widget)
1034   "Actually recursively update tags for WIDGET."
1035   (save-excursion
1036     (let ((children (widget-get widget :children)))
1037       (dolist (w children)
1038         (newsticker--treeview-tree-do-update-tags w))
1039       (newsticker--treeview-tree-update-tag widget))))
1040
1041 (defun newsticker--treeview-tree-update-tags (&rest ignore)
1042   "Update all tags of all trees.
1043 Arguments IGNORE are ignored."
1044   (save-current-buffer
1045     (set-buffer (newsticker--treeview-tree-buffer))
1046     (let ((inhibit-read-only t))
1047       (newsticker--treeview-tree-do-update-tags
1048        newsticker--treeview-feed-tree)
1049       (newsticker--treeview-tree-do-update-tags
1050        newsticker--treeview-vfeed-tree))
1051       (tree-widget-set-theme "folder")))
1052
1053 (defun newsticker--treeview-tree-update-highlight ()
1054   "Update highlight in tree buffer."
1055   (let ((pos (widget-get (newsticker--treeview-get-current-node) :from)))
1056     (unless (or (integerp pos) (and (markerp pos) (marker-position pos)))
1057       (setq pos (widget-get (widget-get
1058                              (newsticker--treeview-get-current-node)
1059                                         :parent) :from)))
1060     (when (or (integerp pos) (and (markerp pos) (marker-position pos)))
1061       (with-current-buffer (newsticker--treeview-tree-buffer)
1062         (goto-char pos)
1063         (move-overlay newsticker--tree-selection-overlay
1064                       (point-at-bol) (1+ (point-at-eol))
1065                       (current-buffer)))
1066       (if (window-live-p (newsticker--treeview-tree-window))
1067           (set-window-point (newsticker--treeview-tree-window) pos)))))
1068
1069 ;; ======================================================================
1070 ;;; Toolbar
1071 ;; ======================================================================
1072 ;;(makunbound 'newsticker-treeview-tool-bar-map)
1073 (defvar newsticker-treeview-tool-bar-map
1074   (if (featurep 'xemacs)
1075       nil
1076     (if (boundp 'tool-bar-map)
1077         (let ((tool-bar-map (make-sparse-keymap)))
1078           (define-key tool-bar-map [newsticker-sep-1]
1079             (list 'menu-item "--double-line"))
1080           (define-key tool-bar-map [newsticker-browse-url]
1081             (list 'menu-item "newsticker-browse-url"
1082                   'newsticker-browse-url
1083                   :visible t
1084                   :help "Browse URL for item at point"
1085                   :image newsticker--browse-image))
1086           (define-key tool-bar-map [newsticker-buffer-force-update]
1087             (list 'menu-item "newsticker-treeview-update"
1088                   'newsticker-treeview-update
1089                   :visible t
1090                   :help "Update newsticker buffer"
1091                   :image newsticker--update-image
1092                   :enable t))
1093           (define-key tool-bar-map [newsticker-get-all-news]
1094             (list 'menu-item "newsticker-get-all-news" 'newsticker-get-all-news
1095                   :visible t
1096                   :help "Get news for all feeds"
1097                   :image newsticker--get-all-image))
1098           (define-key tool-bar-map [newsticker-mark-item-at-point-as-read]
1099             (list 'menu-item "newsticker-treeview-mark-item-old"
1100                   'newsticker-treeview-mark-item-old
1101                   :visible t
1102                   :image newsticker--mark-read-image
1103                   :help "Mark current item as read"
1104                   ;;:enable '(newsticker-item-not-old-p) FIXME
1105                   ))
1106           (define-key tool-bar-map [newsticker-mark-item-at-point-as-immortal]
1107             (list 'menu-item "newsticker-treeview-toggle-item-immortal"
1108                   'newsticker-treeview-toggle-item-immortal
1109                   :visible t
1110                   :image newsticker--mark-immortal-image
1111                   :help "Toggle current item as immortal"
1112                   :enable t
1113                   ;;'(newsticker-item-not-immortal-p) FIXME
1114                   ))
1115           (define-key tool-bar-map [newsticker-next-feed]
1116             (list 'menu-item "newsticker-treeview-next-feed"
1117                   'newsticker-treeview-next-feed
1118                   :visible t
1119                   :help "Go to next feed"
1120                   :image newsticker--next-feed-image
1121                   :enable t
1122                   ;;'(newsticker-next-feed-available-p) FIXME
1123                   ))
1124           (define-key tool-bar-map [newsticker-treeview-next-item]
1125             (list 'menu-item "newsticker-treeview-next-item"
1126                   'newsticker-treeview-next-item
1127                   :visible t
1128                   :help "Go to next item"
1129                   :image newsticker--next-item-image
1130                   :enable t
1131                   ;;'(newsticker-next-item-available-p) FIXME
1132                   ))
1133           (define-key tool-bar-map [newsticker-treeview-prev-item]
1134             (list 'menu-item "newsticker-treeview-prev-item"
1135                   'newsticker-treeview-prev-item
1136                   :visible t
1137                   :help "Go to previous item"
1138                   :image newsticker--previous-item-image
1139                   :enable t
1140                   ;;'(newsticker-previous-item-available-p) FIXME
1141                   ))
1142           (define-key tool-bar-map [newsticker-treeview-prev-feed]
1143             (list 'menu-item "newsticker-treeview-prev-feed"
1144                   'newsticker-treeview-prev-feed
1145                   :visible t
1146                   :help "Go to previous feed"
1147                   :image newsticker--previous-feed-image
1148                   :enable t
1149                   ;;'(newsticker-previous-feed-available-p) FIXME
1150                   ))
1151           ;; standard icons / actions
1152           (tool-bar-add-item "close"
1153                              'newsticker-treeview-quit
1154                              'newsticker-treeview-quit
1155                              :help "Close newsticker")
1156           (tool-bar-add-item "preferences"
1157                              'newsticker-customize
1158                              'newsticker-customize
1159                              :help "Customize newsticker")
1160           tool-bar-map))))
1161
1162 ;; ======================================================================
1163 ;;; actions
1164 ;; ======================================================================
1165
1166 (defun newsticker-treeview-mouse-browse-url (event)
1167   "Call `browse-url' for the link of the item at which the EVENT occurred."
1168   (interactive "e")
1169   (save-excursion
1170     (switch-to-buffer (window-buffer (posn-window (event-end event))))
1171     (let ((url (get-text-property (posn-point (event-end event))
1172                                   :nt-link)))
1173       (when url
1174         (browse-url url)
1175         (if newsticker-automatically-mark-visited-items-as-old
1176             (newsticker-treeview-mark-item-old))))))
1177
1178 (defun newsticker-treeview-browse-url ()
1179   "Call `browse-url' for the link of the item at point."
1180   (interactive)
1181   (with-current-buffer (newsticker--treeview-list-buffer)
1182     (let ((url (get-text-property (point) :nt-link)))
1183       (when url
1184         (browse-url url)
1185         (if newsticker-automatically-mark-visited-items-as-old
1186             (newsticker-treeview-mark-item-old))))))
1187
1188 (defun newsticker--treeview-buffer-init ()
1189   "Initialize all treeview buffers."
1190   (setq newsticker--treeview-buffers nil)
1191   (add-to-list 'newsticker--treeview-buffers
1192                (get-buffer-create "*Newsticker Tree*") t)
1193   (add-to-list 'newsticker--treeview-buffers
1194                (get-buffer-create "*Newsticker List*") t)
1195   (add-to-list 'newsticker--treeview-buffers
1196                (get-buffer-create "*Newsticker Item*") t)
1197
1198   (unless newsticker--selection-overlay
1199     (with-current-buffer (newsticker--treeview-list-buffer)
1200       (setq newsticker--selection-overlay (make-overlay (point-min)
1201                                                         (point-max)))
1202       (overlay-put newsticker--selection-overlay 'face
1203                    'newsticker-treeview-selection-face)))
1204   (unless newsticker--tree-selection-overlay
1205     (with-current-buffer (newsticker--treeview-tree-buffer)
1206       (setq newsticker--tree-selection-overlay (make-overlay (point-min)
1207                                                              (point-max)))
1208       (overlay-put newsticker--tree-selection-overlay 'face
1209                    'newsticker-treeview-selection-face)))
1210
1211   (newsticker--treeview-tree-update)
1212   (newsticker--treeview-list-update t)
1213   (newsticker--treeview-item-update))
1214
1215 (defun newsticker-treeview-update ()
1216   "Update all treeview buffers and windows.
1217 Note: does not update the layout."
1218   (interactive)
1219   (let ((cur-item (newsticker--treeview-get-selected-item)))
1220     (newsticker--group-manage-orphan-feeds)
1221     (newsticker--treeview-list-update t)
1222     (newsticker--treeview-item-update)
1223     (newsticker--treeview-tree-update-tags)
1224     (cond (newsticker--treeview-current-feed
1225            (newsticker--treeview-list-items newsticker--treeview-current-feed))
1226           (newsticker--treeview-current-vfeed
1227            (newsticker--treeview-list-items-with-age
1228             (intern newsticker--treeview-current-vfeed))))
1229     (newsticker--treeview-tree-update-highlight)
1230     (newsticker--treeview-list-update-highlight)
1231     (let ((cur-feed (or newsticker--treeview-current-feed
1232                         newsticker--treeview-current-vfeed)))
1233       (if (and cur-feed cur-item)
1234           (newsticker--treeview-list-select cur-item)))))
1235
1236 (defun newsticker-treeview-quit ()
1237   "Quit newsticker treeview."
1238   (interactive)
1239   (setq newsticker--sentinel-callback nil)
1240   (bury-buffer "*Newsticker Tree*")
1241   (bury-buffer "*Newsticker List*")
1242   (bury-buffer "*Newsticker Item*")
1243   (set-window-configuration newsticker--saved-window-config)
1244   (when newsticker--frame
1245     (if (frame-live-p newsticker--frame)
1246       (delete-frame newsticker--frame))
1247     (setq newsticker--frame nil))
1248   (newsticker-treeview-save))
1249
1250 (defun newsticker-treeview-save ()
1251   "Save newsticker data including treeview settings."
1252   (interactive)
1253   (let ((coding-system-for-write 'utf-8)
1254         (buf (find-file-noselect (concat newsticker-dir "/groups"))))
1255     (when buf
1256       (with-current-buffer buf
1257         (setq buffer-undo-list t)
1258         (erase-buffer)
1259         (insert ";; -*- coding: utf-8 -*-\n")
1260         (insert (prin1-to-string newsticker-groups))
1261         (save-buffer)
1262         (kill-buffer)))))
1263
1264 (defun newsticker--treeview-load ()
1265   "Load treeview settings."
1266   (let* ((coding-system-for-read 'utf-8)
1267          (filename
1268           (or (and (file-exists-p newsticker-groups-filename)
1269                    (y-or-n-p
1270                     (format "Old newsticker groups (%s) file exists.  Read it? "
1271                             newsticker-groups-filename))
1272                    newsticker-groups-filename)
1273               (concat newsticker-dir "/groups")))
1274          (buf (and (file-exists-p filename)
1275                    (find-file-noselect filename))))
1276     (and (file-exists-p newsticker-groups-filename)
1277          (y-or-n-p (format "Delete old newsticker groups file? "))
1278          (delete-file newsticker-groups-filename))
1279     (when buf
1280       (set-buffer buf)
1281       (goto-char (point-min))
1282       (condition-case nil
1283           (setq newsticker-groups (read buf))
1284         (error
1285          (message "Error while reading newsticker groups file!")
1286          (setq newsticker-groups nil)))
1287       (kill-buffer buf))))
1288
1289
1290 (defun newsticker-treeview-scroll-item ()
1291   "Scroll current item."
1292   (interactive)
1293   (save-selected-window
1294     (select-window (newsticker--treeview-item-window) t)
1295     (scroll-up 1)))
1296
1297 (defun newsticker-treeview-show-item ()
1298   "Show current item."
1299   (interactive)
1300   (newsticker--treeview-restore-layout)
1301   (newsticker--treeview-list-update-highlight)
1302   (with-current-buffer (newsticker--treeview-list-buffer)
1303     (beginning-of-line)
1304     (let ((item (get-text-property (point) :nt-item))
1305           (feed (get-text-property (point) :nt-feed)))
1306       (newsticker--treeview-item-show item feed)))
1307   (newsticker--treeview-tree-update-tag
1308    (newsticker--treeview-get-current-node) t)
1309   (newsticker--treeview-tree-update-highlight))
1310
1311 (defun newsticker-treeview-next-item ()
1312   "Move to next item."
1313   (interactive)
1314   (newsticker--treeview-restore-layout)
1315   (save-current-buffer
1316     (set-buffer (newsticker--treeview-list-buffer))
1317     (if (newsticker--treeview-list-highlight-start)
1318         (forward-line 1))
1319     (if (eobp)
1320         (forward-line -1)))
1321   (newsticker-treeview-show-item))
1322
1323 (defun newsticker-treeview-prev-item ()
1324   "Move to previous item."
1325   (interactive)
1326   (newsticker--treeview-restore-layout)
1327   (save-current-buffer
1328     (set-buffer (newsticker--treeview-list-buffer))
1329     (forward-line -1))
1330   (newsticker-treeview-show-item))
1331
1332 (defun newsticker-treeview-next-new-or-immortal-item (&optional
1333                                                       current-item-counts
1334                                                       dont-wrap-trees)
1335   "Move to next new or immortal item.
1336 Will move to next feed until an item is found.  Will not move if
1337 optional argument CURRENT-ITEM-COUNTS is t and current item is
1338 new or immortal.  Will not move from virtual to ordinary feed
1339 tree or vice versa if optional argument DONT-WRAP-TREES is non-nil."
1340   (interactive)
1341   (newsticker--treeview-restore-layout)
1342   (newsticker--treeview-list-clear-highlight)
1343   (unless (catch 'found
1344             (let ((move (not current-item-counts)))
1345               (while t
1346                 (save-current-buffer
1347                   (set-buffer (newsticker--treeview-list-buffer))
1348                   (when move (forward-line 1)
1349                         (when (eobp)
1350                           (forward-line -1)
1351                           (throw 'found nil))))
1352                 (when (memq (newsticker--age
1353                              (newsticker--treeview-get-selected-item))
1354                             '(new immortal))
1355                   (newsticker-treeview-show-item)
1356                   (throw 'found t))
1357                 (setq move t))))
1358     (let ((wrap-trees (not dont-wrap-trees)))
1359       (when (or (newsticker-treeview-next-feed t)
1360                 (and wrap-trees (newsticker--treeview-first-feed)))
1361         (newsticker-treeview-next-new-or-immortal-item t t)))))
1362
1363 (defun newsticker-treeview-prev-new-or-immortal-item ()
1364   "Move to previous new or immortal item.
1365 Will move to previous feed until an item is found."
1366   (interactive)
1367   (newsticker--treeview-restore-layout)
1368   (newsticker--treeview-list-clear-highlight)
1369   (unless (catch 'found
1370             (while t
1371               (save-current-buffer
1372                 (set-buffer (newsticker--treeview-list-buffer))
1373                 (when (bobp)
1374                   (throw 'found nil))
1375                 (forward-line -1))
1376               (when (memq (newsticker--age
1377                            (newsticker--treeview-get-selected-item))
1378                           '(new immortal))
1379                 (newsticker-treeview-show-item)
1380                 (throw 'found t))
1381                 (when (bobp)
1382                   (throw 'found nil))))
1383     (when (newsticker-treeview-prev-feed t)
1384       (set-buffer (newsticker--treeview-list-buffer))
1385       (goto-char (point-max))
1386       (newsticker-treeview-prev-new-or-immortal-item))))
1387
1388 (defun newsticker--treeview-get-selected-item ()
1389   "Return item that is currently selected in list buffer."
1390   (with-current-buffer (newsticker--treeview-list-buffer)
1391     (beginning-of-line)
1392     (get-text-property (point) :nt-item)))
1393
1394 (defun newsticker-treeview-mark-item-old (&optional dont-proceed)
1395   "Mark current item as old unless it is obsolete.
1396 Move to next item unless DONT-PROCEED is non-nil."
1397   (interactive)
1398   (let ((item (newsticker--treeview-get-selected-item)))
1399     (unless (eq (newsticker--age item) 'obsolete)
1400       (newsticker--treeview-mark-item item 'old)))
1401   (unless dont-proceed
1402     (newsticker-treeview-next-item)))
1403
1404 (defun newsticker-treeview-toggle-item-immortal ()
1405   "Toggle immortality of current item."
1406   (interactive)
1407   (let* ((item (newsticker--treeview-get-selected-item))
1408          (new-age (if (eq (newsticker--age item) 'immortal)
1409                       'old
1410                     'immortal)))
1411     (newsticker--treeview-mark-item item new-age)
1412     (newsticker-treeview-next-item)))
1413
1414 (defun newsticker--treeview-mark-item (item new-age)
1415   "Mark ITEM with NEW-AGE."
1416   (when item
1417     (setcar (nthcdr 4 item) new-age)
1418     ;; clean up ticker FIXME
1419     )
1420   (newsticker--cache-save-feed
1421    (newsticker--cache-get-feed (intern newsticker--treeview-current-feed)))
1422   (newsticker--treeview-tree-do-update-tags newsticker--treeview-vfeed-tree))
1423
1424 (defun newsticker-treeview-mark-list-items-old ()
1425   "Mark all listed items as old."
1426   (interactive)
1427   (let ((current-feed (or newsticker--treeview-current-feed
1428                           newsticker--treeview-current-vfeed)))
1429     (with-current-buffer (newsticker--treeview-list-buffer)
1430       (goto-char (point-min))
1431       (while (not (eobp))
1432         (let ((item (get-text-property (point) :nt-item)))
1433           (unless (memq (newsticker--age item) '(immortal obsolete))
1434             (newsticker--treeview-mark-item item 'old)))
1435         (forward-line 1)))
1436     (newsticker--treeview-tree-update-tags)
1437     (if current-feed
1438         (newsticker-treeview-jump current-feed))))
1439
1440 (defun newsticker-treeview-save-item ()
1441   "Save current item."
1442   (interactive)
1443   (newsticker-save-item (or newsticker--treeview-current-feed
1444                             newsticker--treeview-current-vfeed)
1445                         (newsticker--treeview-get-selected-item)))
1446
1447 (defun newsticker-treeview-browse-url-item ()
1448   "Convert current item to HTML and call `browse-url' on result."
1449   (interactive)
1450   (newsticker-browse-url-item (or newsticker--treeview-current-feed
1451                                   newsticker--treeview-current-vfeed)
1452                               (newsticker--treeview-get-selected-item)))
1453
1454 (defun newsticker--treeview-set-current-node (node)
1455   "Make NODE the current node."
1456   (with-current-buffer (newsticker--treeview-tree-buffer)
1457     (setq newsticker--treeview-current-node-id
1458           (widget-get node :nt-id))
1459     (setq newsticker--treeview-current-feed (widget-get node :nt-feed))
1460     (setq newsticker--treeview-current-vfeed (widget-get node :nt-vfeed))
1461     (newsticker--treeview-tree-update-highlight)))
1462
1463 (defun newsticker--treeview-get-first-child (node)
1464   "Get first child of NODE."
1465   (let ((children (widget-get node :children)))
1466     (if children
1467         (car children)
1468       nil)))
1469
1470 (defun newsticker--treeview-get-second-child (node)
1471   "Get scond child of NODE."
1472   (let ((children (widget-get node :children)))
1473     (if children
1474         (car (cdr children))
1475       nil)))
1476
1477 (defun newsticker--treeview-get-last-child (node)
1478   "Get last child of NODE."
1479   ;;(message "newsticker--treeview-get-last-child %s" (widget-get node :tag))
1480   (let ((children (widget-get node :children)))
1481     (if children
1482         (car (reverse children))
1483       nil)))
1484
1485 (defun newsticker--treeview-get-feed-vfeed (node)
1486   "Get (virtual) feed of NODE."
1487   (or (widget-get node :nt-feed) (widget-get node :nt-vfeed)))
1488
1489 (defun newsticker--treeview-get-next-sibling (node)
1490   "Get next sibling of NODE."
1491   (let ((parent (widget-get node :parent)))
1492     (catch 'found
1493       (let ((children (widget-get parent :children)))
1494         (while children
1495           (if (newsticker--treeview-nodes-eq (car children) node)
1496               (throw 'found (car (cdr children))))
1497           (setq children (cdr children)))))))
1498
1499 (defun newsticker--treeview-get-prev-sibling (node)
1500   "Get previous sibling of NODE."
1501   (let ((parent (widget-get node :parent)))
1502     (catch 'found
1503       (let ((children (widget-get parent :children))
1504             (prev nil))
1505         (while children
1506           (if (and (newsticker--treeview-nodes-eq (car children) node)
1507                    (widget-get prev :nt-id))
1508               (throw 'found prev))
1509           (setq prev (car children))
1510           (setq children (cdr children)))))))
1511
1512 (defun newsticker--treeview-get-next-uncle (node)
1513   "Get next uncle of NODE, i.e. parent's next sibling."
1514   (let* ((parent (widget-get node :parent))
1515          (grand-parent (widget-get parent :parent)))
1516     (catch 'found
1517       (let ((uncles (widget-get grand-parent :children)))
1518         (while uncles
1519           (if (newsticker--treeview-nodes-eq (car uncles) parent)
1520               (throw 'found (car (cdr uncles))))
1521           (setq uncles (cdr uncles)))))))
1522
1523 (defun newsticker--treeview-get-prev-uncle (node)
1524   "Get previous uncle of NODE, i.e. parent's previous sibling."
1525   (let* ((parent (widget-get node :parent))
1526          (grand-parent (widget-get parent :parent)))
1527     (catch 'found
1528       (let ((uncles (widget-get grand-parent :children))
1529             (prev nil))
1530         (while uncles
1531           (if (newsticker--treeview-nodes-eq (car uncles) parent)
1532               (throw 'found prev))
1533           (setq prev (car uncles))
1534           (setq uncles (cdr uncles)))))))
1535
1536 (defun newsticker--treeview-get-other-tree ()
1537   "Get other tree."
1538   (if (and (newsticker--treeview-get-current-node)
1539            (widget-get (newsticker--treeview-get-current-node) :nt-feed))
1540       newsticker--treeview-vfeed-tree
1541     newsticker--treeview-feed-tree))
1542
1543 (defun newsticker--treeview-activate-node (node &optional backward)
1544   "Activate NODE.
1545 If NODE is a tree widget the node's first subnode is activated.
1546 If BACKWARD is non-nil the last subnode of the previous sibling
1547 is activated."
1548   (newsticker--treeview-set-current-node node)
1549   (save-current-buffer
1550     (set-buffer (newsticker--treeview-tree-buffer))
1551     (cond ((eq (widget-type node) 'tree-widget)
1552            (unless (widget-get node :open)
1553              (widget-put node :open nil)
1554              (widget-apply-action node))
1555            (newsticker--treeview-activate-node
1556             (if backward
1557                 (newsticker--treeview-get-last-child node)
1558               (newsticker--treeview-get-second-child node))))
1559           (node
1560            (widget-apply-action node)))))
1561
1562 (defun newsticker--treeview-first-feed ()
1563   "Jump to the depth-first feed in the `newsticker-groups' tree."
1564   (newsticker-treeview-jump
1565    (car (reverse (newsticker--group-get-feeds newsticker-groups t)))))
1566
1567 (defun newsticker-treeview-next-feed (&optional stay-in-tree)
1568   "Move to next feed.
1569 Optional argument STAY-IN-TREE prevents moving from real feed
1570 tree to virtual feed tree or vice versa.
1571 Return t if a new feed was activated, nil otherwise."
1572   (interactive)
1573   (newsticker--treeview-restore-layout)
1574   (let ((cur (newsticker--treeview-get-current-node))
1575         (new nil))
1576     (setq new
1577           (if cur
1578               (or (newsticker--treeview-get-next-sibling cur)
1579                   (newsticker--treeview-get-next-uncle cur)
1580                   (and (not stay-in-tree)
1581                        (newsticker--treeview-get-other-tree)))
1582             (car (widget-get newsticker--treeview-feed-tree :children))))
1583     (if new
1584         (progn
1585           (newsticker--treeview-activate-node new)
1586           (newsticker--treeview-tree-update-highlight)
1587           (not (eq new cur)))
1588       nil)))
1589
1590 (defun newsticker-treeview-prev-feed (&optional stay-in-tree)
1591   "Move to previous feed.
1592 Optional argument STAY-IN-TREE prevents moving from real feed
1593 tree to virtual feed tree or vice versa.
1594 Return t if a new feed was activated, nil otherwise."
1595   (interactive)
1596   (newsticker--treeview-restore-layout)
1597   (let ((cur (newsticker--treeview-get-current-node))
1598         (new nil))
1599     (if cur
1600       (progn
1601         (setq new
1602               (if cur
1603                   (or (newsticker--treeview-get-prev-sibling cur)
1604                       (newsticker--treeview-get-prev-uncle cur)
1605                       (and (not stay-in-tree)
1606                            (newsticker--treeview-get-other-tree)))
1607                 (car (widget-get newsticker--treeview-feed-tree :children))))
1608         (if new
1609             (progn
1610               (newsticker--treeview-activate-node new t)
1611               (newsticker--treeview-tree-update-highlight)
1612               (not (eq new cur)))
1613           nil))
1614       nil)))
1615
1616 (defun newsticker-treeview-next-page ()
1617   "Scroll item buffer."
1618   (interactive)
1619   (save-selected-window
1620     (select-window (newsticker--treeview-item-window) t)
1621     (condition-case nil
1622         (scroll-up nil)
1623       (error
1624        (goto-char (point-min))))))
1625
1626
1627 (defun newsticker--treeview-unfold-node (feed-name)
1628   "Recursively show subtree above the node that represents FEED-NAME."
1629   (let ((node (newsticker--treeview-get-node-of-feed feed-name)))
1630     (unless node
1631       (let* ((group-name (or (car (newsticker--group-find-group-for-feed
1632                                    feed-name))
1633                              (newsticker--group-get-parent-group
1634                               feed-name))))
1635         (newsticker--treeview-unfold-node group-name))
1636       (setq node (newsticker--treeview-get-node-of-feed feed-name)))
1637     (when node
1638       (with-current-buffer (newsticker--treeview-tree-buffer)
1639         (widget-put node :nt-selected t)
1640         (widget-apply-action node)
1641         (newsticker--treeview-set-current-node node)))))
1642
1643 (defun newsticker-treeview-jump (feed-name)
1644   "Jump to feed FEED-NAME in newsticker treeview."
1645   (interactive
1646    (list (let ((completion-ignore-case t))
1647            (completing-read
1648             "Jump to feed: "
1649             (append '("new" "obsolete" "immortal" "all")
1650                     (mapcar 'car (append newsticker-url-list
1651                                          newsticker-url-list-defaults)))
1652             nil t))))
1653   (newsticker--treeview-unfold-node feed-name))
1654
1655 ;; ======================================================================
1656 ;;; Groups
1657 ;; ======================================================================
1658 (defun newsticker--group-do-find-group-for-feed (feed-name node)
1659   "Recursively find FEED-NAME in NODE."
1660   (if (member feed-name (cdr node))
1661       (throw 'found node)
1662     (mapc (lambda (n)
1663             (if (listp n)
1664                 (newsticker--group-do-find-group-for-feed feed-name n)))
1665           (cdr node))))
1666
1667 (defun newsticker--group-find-group-for-feed (feed-name)
1668   "Find group containing FEED-NAME."
1669   (catch 'found
1670     (newsticker--group-do-find-group-for-feed feed-name
1671                                               newsticker-groups)
1672     nil))
1673
1674 (defun newsticker--group-do-get-group (name node)
1675   "Recursively find group with NAME below NODE."
1676   (if (string= name (car node))
1677       (throw 'found node)
1678     (mapc (lambda (n)
1679             (if (listp n)
1680                 (newsticker--group-do-get-group name n)))
1681           (cdr node))))
1682
1683 (defun newsticker--group-get-group (name)
1684   "Find group with NAME."
1685   (catch 'found
1686     (mapc (lambda (n)
1687             (if (listp n)
1688                 (newsticker--group-do-get-group name n)))
1689           newsticker-groups)
1690     nil))
1691
1692 (defun newsticker--group-do-get-parent-group (name node parent)
1693   "Recursively find parent group for NAME from NODE which is a child of PARENT."
1694   (if (string= name (car node))
1695       (throw 'found parent)
1696     (mapc (lambda (n)
1697             (if (listp n)
1698                 (newsticker--group-do-get-parent-group name n (car node))))
1699           (cdr node))))
1700
1701 (defun newsticker--group-get-parent-group (name)
1702   "Find parent group for group named NAME."
1703   (catch 'found
1704     (mapc (lambda (n)
1705             (if (listp n)
1706                 (newsticker--group-do-get-parent-group
1707                  name n (car newsticker-groups))))
1708           newsticker-groups)
1709     nil))
1710
1711
1712 (defun newsticker--group-get-subgroups (group &optional recursive)
1713   "Return list of subgroups for GROUP.
1714 If RECURSIVE is non-nil recursively get subgroups and return a nested list."
1715   (let ((result nil))
1716     (mapc (lambda (n)
1717             (when (listp n)
1718               (setq result (cons (car n) result))
1719               (let ((subgroups (newsticker--group-get-subgroups n recursive)))
1720                 (when subgroups
1721                   (setq result (append subgroups result))))))
1722           group)
1723     result))
1724
1725 (defun newsticker--group-all-groups ()
1726   "Return nested list of all groups."
1727   (newsticker--group-get-subgroups newsticker-groups t))
1728
1729 (defun newsticker--group-get-feeds (group &optional recursive)
1730   "Return list of all feeds in GROUP.
1731 If RECURSIVE is non-nil recursively get feeds of subgroups and
1732 return a nested list."
1733   (let ((result nil))
1734     (mapc (lambda (n)
1735             (if (not (listp n))
1736                 (setq result (cons n result))
1737               (if recursive
1738                   (let ((subfeeds (newsticker--group-get-feeds n t)))
1739                     (when subfeeds
1740                       (setq result (append subfeeds result)))))))
1741           (cdr group))
1742     result))
1743
1744 (defun newsticker-group-add-group (name parent)
1745   "Add group NAME to group PARENT."
1746   (interactive
1747    (list (read-string "Group Name: ")
1748          (let ((completion-ignore-case t))
1749            (completing-read "Parent Group: " (newsticker--group-all-groups)
1750                             nil t))))
1751   (if (newsticker--group-get-group name)
1752       (error "Group %s exists already" name))
1753   (let ((p (if (and parent (not (string= parent "")))
1754                (newsticker--group-get-group parent)
1755              newsticker-groups)))
1756     (unless p
1757       (error "Parent %s does not exist" parent))
1758     (setcdr p (cons (list name) (cdr p))))
1759   (newsticker--treeview-tree-update))
1760
1761 (defun newsticker-group-move-feed (name group-name &optional no-update)
1762   "Move feed NAME to group GROUP-NAME.
1763 Update teeview afterwards unless NO-UPDATE is non-nil."
1764   (interactive
1765    (let ((completion-ignore-case t))
1766      (list (completing-read "Feed Name: "
1767                             (mapcar 'car newsticker-url-list)
1768                             nil t newsticker--treeview-current-feed)
1769            (completing-read "Group Name: " (newsticker--group-all-groups)
1770                             nil t))))
1771   (let ((group (if (and group-name (not (string= group-name "")))
1772                    (newsticker--group-get-group group-name)
1773                  newsticker-groups)))
1774     (unless group
1775       (error "Group %s does not exist" group-name))
1776     (while (let ((old-group
1777                   (newsticker--group-find-group-for-feed name)))
1778              (when old-group
1779                (delete name old-group))
1780              old-group))
1781     (setcdr group (cons name (cdr group)))
1782     (unless no-update
1783       (newsticker--treeview-tree-update)
1784       (newsticker-treeview-update))))
1785
1786 (defun newsticker-group-delete-group (name)
1787   "Remove group NAME."
1788   (interactive
1789    (let ((completion-ignore-case t))
1790      (list (completing-read "Group Name: " (newsticker--group-all-groups)
1791                             nil t))))
1792   (let* ((g (newsticker--group-get-group name))
1793          (p (or (newsticker--group-get-parent-group name)
1794                 newsticker-groups)))
1795     (unless g
1796       (error "Group %s does not exist" name))
1797     (delete g p))
1798   (newsticker--treeview-tree-update))
1799
1800 (defun newsticker--count-groups (group)
1801   "Recursively count number of subgroups of GROUP."
1802   (let ((result 1))
1803     (mapc (lambda (g)
1804             (if (listp g)
1805                 (setq result (+ result (newsticker--count-groups g)))))
1806           (cdr group))
1807     result))
1808
1809 (defun newsticker--count-grouped-feeds (group)
1810   "Recursively count number of feeds in GROUP and its subgroups."
1811   (let ((result 0))
1812     (mapc (lambda (g)
1813             (if (listp g)
1814                 (setq result (+ result (newsticker--count-grouped-feeds g)))
1815               (setq result (1+ result))))
1816           (cdr group))
1817     result))
1818
1819 (defun newsticker--group-remove-obsolete-feeds (group)
1820   "Recursively remove obselete feeds from GROUP."
1821   (let ((result nil)
1822         (urls (append newsticker-url-list newsticker-url-list-defaults)))
1823     (mapc (lambda (g)
1824             (if (listp g)
1825                 (let ((sub-groups
1826                        (newsticker--group-remove-obsolete-feeds g)))
1827                   (if sub-groups
1828                       (setq result (cons sub-groups result))))
1829               (if (assoc g urls)
1830                   (setq result (cons g result)))))
1831           (cdr group))
1832     (if result
1833         (cons (car group) (reverse result))
1834       result)))
1835
1836 (defun newsticker--group-manage-orphan-feeds ()
1837   "Put unmanaged feeds into `newsticker-groups'.
1838 Remove obsolete feeds as well."
1839   (unless newsticker-groups
1840     (setq newsticker-groups '("Feeds")))
1841   (let ((new-feed nil)
1842         (grouped-feeds (newsticker--count-grouped-feeds newsticker-groups)))
1843     (mapc (lambda (f)
1844             (unless (newsticker--group-find-group-for-feed (car f))
1845               (setq new-feed t)
1846               (newsticker-group-move-feed (car f) nil t)))
1847           (append newsticker-url-list-defaults newsticker-url-list))
1848     (setq newsticker-groups
1849           (newsticker--group-remove-obsolete-feeds newsticker-groups))
1850     (if (or new-feed
1851             (not (= grouped-feeds
1852                     (newsticker--count-grouped-feeds newsticker-groups))))
1853         (newsticker--treeview-tree-update))))
1854
1855 ;; ======================================================================
1856 ;;; Modes
1857 ;; ======================================================================
1858 (defun newsticker--treeview-create-groups-menu (group-list
1859                                                 excluded-group)
1860   "Create menu for GROUP-LIST omitting EXCLUDED-GROUP."
1861   (let ((menu (make-sparse-keymap (if (stringp (car group-list))
1862                                       (car group-list)
1863                                     "Move to group..."))))
1864     (mapc (lambda (g)
1865             (when (listp g)
1866               (let ((title (if (stringp (car g))
1867                                (car g)
1868                              "Move to group...")))
1869                 (unless (eq g excluded-group)
1870                   (define-key menu (vector (intern title))
1871                     (list 'menu-item title
1872                           (newsticker--treeview-create-groups-menu
1873                            (cdr g) excluded-group)))))))
1874           (reverse group-list))
1875     menu))
1876
1877 (defun newsticker--treeview-create-tree-menu (feed-name)
1878   "Create tree menu for FEED-NAME."
1879   (let ((menu (make-sparse-keymap feed-name)))
1880     (define-key menu [newsticker-treeview-mark-list-items-old]
1881       (list 'menu-item "Mark all items old"
1882             'newsticker-treeview-mark-list-items-old))
1883     (define-key menu [move]
1884       (list 'menu-item "Move to group..."
1885             (newsticker--treeview-create-groups-menu
1886              newsticker-groups
1887              (newsticker--group-get-group feed-name))))
1888     menu))
1889
1890 (defvar newsticker-treeview-list-menu
1891   (let ((menu (make-sparse-keymap "Newsticker List")))
1892     (define-key menu [newsticker-treeview-mark-list-items-old]
1893       (list 'menu-item "Mark all items old"
1894             'newsticker-treeview-mark-list-items-old))
1895     (define-key menu [newsticker-treeview-mark-item-old]
1896       (list 'menu-item "Mark current item old"
1897             'newsticker-treeview-mark-item-old))
1898     (define-key menu [newsticker-treeview-toggle-item-immortal]
1899       (list 'menu-item "Mark current item immortal (toggle)"
1900             'newsticker-treeview-toggle-item-immortal))
1901     (define-key menu [newsticker-treeview-get-news]
1902       (list 'menu-item "Get news for current feed"
1903             'newsticker-treeview-get-news))
1904     menu)
1905   "Map for newsticker list menu.")
1906
1907 (defvar newsticker-treeview-item-menu
1908   (let ((menu (make-sparse-keymap "Newsticker Item")))
1909     (define-key menu [newsticker-treeview-mark-item-old]
1910       (list 'menu-item "Mark current item old"
1911             'newsticker-treeview-mark-item-old))
1912     (define-key menu [newsticker-treeview-toggle-item-immortal]
1913       (list 'menu-item "Mark current item immortal (toggle)"
1914             'newsticker-treeview-toggle-item-immortal))
1915     (define-key menu [newsticker-treeview-get-news]
1916       (list 'menu-item "Get news for current feed"
1917             'newsticker-treeview-get-news))
1918     menu)
1919   "Map for newsticker item menu.")
1920
1921 (defvar newsticker-treeview-mode-map
1922   (let ((map (make-sparse-keymap 'newsticker-treeview-mode-map)))
1923     (define-key map " " 'newsticker-treeview-next-page)
1924     (define-key map "a" 'newsticker-add-url)
1925     (define-key map "b" 'newsticker-treeview-browse-url-item)
1926     (define-key map "F" 'newsticker-treeview-prev-feed)
1927     (define-key map "f" 'newsticker-treeview-next-feed)
1928     (define-key map "g" 'newsticker-treeview-get-news)
1929     (define-key map "G" 'newsticker-get-all-news)
1930     (define-key map "i" 'newsticker-treeview-toggle-item-immortal)
1931     (define-key map "j" 'newsticker-treeview-jump)
1932     (define-key map "n" 'newsticker-treeview-next-item)
1933     (define-key map "N" 'newsticker-treeview-next-new-or-immortal-item)
1934     (define-key map "O" 'newsticker-treeview-mark-list-items-old)
1935     (define-key map "o" 'newsticker-treeview-mark-item-old)
1936     (define-key map "p" 'newsticker-treeview-prev-item)
1937     (define-key map "P" 'newsticker-treeview-prev-new-or-immortal-item)
1938     (define-key map "q" 'newsticker-treeview-quit)
1939     (define-key map "S" 'newsticker-treeview-save-item)
1940     (define-key map "s" 'newsticker-treeview-save)
1941     (define-key map "u" 'newsticker-treeview-update)
1942     (define-key map "v" 'newsticker-treeview-browse-url)
1943     ;;(define-key map "\n" 'newsticker-treeview-scroll-item)
1944     ;;(define-key map "\C-m" 'newsticker-treeview-scroll-item)
1945     (define-key map "\M-m" 'newsticker-group-move-feed)
1946     (define-key map "\M-a" 'newsticker-group-add-group)
1947     map)
1948   "Mode map for newsticker treeview.")
1949
1950 (defun newsticker-treeview-mode ()
1951   "Major mode for Newsticker Treeview.
1952 \\{newsticker-treeview-mode-map}"
1953   (kill-all-local-variables)
1954   (use-local-map newsticker-treeview-mode-map)
1955   (setq major-mode 'newsticker-treeview-mode)
1956   (setq mode-name "Newsticker TV")
1957   (if (boundp 'tool-bar-map)
1958       (set (make-local-variable 'tool-bar-map)
1959            newsticker-treeview-tool-bar-map))
1960   (setq buffer-read-only t
1961         truncate-lines t))
1962
1963 (define-derived-mode newsticker-treeview-list-mode newsticker-treeview-mode
1964   "Item List"
1965   (let ((header (concat
1966                  (propertize " " 'display '(space :align-to 0))
1967                  (newsticker-treeview-list-make-sort-button "*" 'sort-by-age)
1968                  (propertize " " 'display '(space :align-to 2))
1969                  (if newsticker--treeview-list-show-feed
1970                      (concat "Feed"
1971                              (propertize " " 'display '(space :align-to 12)))
1972                    "")
1973                  (newsticker-treeview-list-make-sort-button "Date"
1974                                                             'sort-by-time)
1975                  (if newsticker--treeview-list-show-feed
1976                      (propertize " " 'display '(space :align-to 28))
1977                    (propertize " " 'display '(space :align-to 18)))
1978                  (newsticker-treeview-list-make-sort-button "Title"
1979                                                             'sort-by-title))))
1980     (setq header-line-format header))
1981   (define-key newsticker-treeview-list-mode-map [down-mouse-3]
1982     newsticker-treeview-list-menu))
1983
1984 (define-derived-mode newsticker-treeview-item-mode newsticker-treeview-mode
1985   "Item"
1986   (define-key newsticker-treeview-item-mode-map [down-mouse-3]
1987     newsticker-treeview-item-menu))
1988
1989 (defun newsticker-treeview-tree-click (event)
1990   "Handle click EVENT on a tag in the newsticker tree."
1991   (interactive "e")
1992   (newsticker--treeview-restore-layout)
1993   (save-excursion
1994     (switch-to-buffer (window-buffer (posn-window (event-end event))))
1995     (newsticker-treeview-tree-do-click (posn-point (event-end event)))))
1996
1997 (defun newsticker-treeview-tree-do-click (&optional pos event)
1998   "Actually handle click event.
1999 POS gives the position where EVENT occurred."
2000   (interactive)
2001   (let* ((pos (or pos (point)))
2002          (nt-id (get-text-property pos :nt-id))
2003          (item (get-text-property pos :nt-item)))
2004     (cond (item
2005            ;; click in list buffer
2006            (newsticker-treeview-show-item))
2007           (t
2008            ;; click in tree buffer
2009            (let ((w (newsticker--treeview-get-node nt-id)))
2010              (when w
2011                (newsticker--treeview-tree-update-tag w t t)
2012                (setq w (newsticker--treeview-get-node nt-id))
2013                (widget-put w :nt-selected t)
2014                (widget-apply w :action event)
2015                (newsticker--treeview-set-current-node w))))))
2016   (newsticker--treeview-tree-update-highlight))
2017
2018 (defun newsticker--treeview-restore-layout ()
2019   "Restore treeview buffers."
2020   (catch 'error
2021     (dotimes (i 3)
2022       (let ((win (nth i newsticker--treeview-windows))
2023             (buf (nth i newsticker--treeview-buffers)))
2024         (unless (window-live-p win)
2025           (newsticker--treeview-window-init)
2026           (newsticker--treeview-buffer-init)
2027           (throw 'error t))
2028         (unless (eq (window-buffer win) buf)
2029           (set-window-buffer win buf t))))))
2030
2031 (defun newsticker--treeview-frame-init ()
2032   "Initialize treeview frame."
2033   (when newsticker-treeview-own-frame
2034     (unless (and newsticker--frame (frame-live-p newsticker--frame))
2035       (setq newsticker--frame (make-frame '((name . "Newsticker")))))
2036     (select-frame-set-input-focus newsticker--frame)
2037     (raise-frame newsticker--frame)))
2038
2039 (defun newsticker--treeview-window-init ()
2040   "Initialize treeview windows."
2041   (setq newsticker--saved-window-config (current-window-configuration))
2042   (setq newsticker--treeview-windows nil)
2043   (setq newsticker--treeview-buffers nil)
2044   (delete-other-windows)
2045   (split-window-horizontally newsticker-treeview-treewindow-width)
2046   (add-to-list 'newsticker--treeview-windows (selected-window) t)
2047   (other-window 1)
2048   (split-window-vertically newsticker-treeview-listwindow-height)
2049   (add-to-list 'newsticker--treeview-windows (selected-window) t)
2050   (other-window 1)
2051   (add-to-list 'newsticker--treeview-windows (selected-window) t)
2052   (other-window 1))
2053
2054 ;;;###autoload
2055 (defun newsticker-treeview ()
2056   "Start newsticker treeview."
2057   (interactive)
2058   (newsticker--treeview-load)
2059   (setq newsticker--sentinel-callback 'newsticker-treeview-update)
2060   (newsticker--treeview-frame-init)
2061   (newsticker--treeview-window-init)
2062   (newsticker--treeview-buffer-init)
2063   (newsticker--group-manage-orphan-feeds)
2064   (newsticker--treeview-set-current-node newsticker--treeview-feed-tree)
2065   (newsticker-start t) ;; will start only if not running
2066   (newsticker-treeview-update)
2067   (newsticker--treeview-item-show-text
2068    "Newsticker"
2069    "Welcome to newsticker!"))
2070
2071 (defun newsticker-treeview-get-news ()
2072   "Get news for current feed."
2073   (interactive)
2074   (when newsticker--treeview-current-feed
2075     (newsticker-get-news newsticker--treeview-current-feed)))
2076
2077 (provide 'newst-treeview)
2078
2079 ;;; newst-treeview.el ends here