lisp/net/newst-plainview.el

   1 ;;; newst-plainview.el --- Single buffer frontend for newsticker.
   2
   3 ;; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009
   4 ;;   Free Software Foundation, Inc.
   5
   6 ;; Author:      Ulf Jasper <ulf.jasper@web.de>
   7 ;; Filename:    newst-plainview.el
   8 ;; URL:         http://www.nongnu.org/newsticker
   9 ;; Time-stamp:  "13. Oktober 2008, 20:34:21 (ulf)"
  10
  11 ;; ======================================================================
  12
  13 ;; This file is part of GNU Emacs.
  14
  15 ;; GNU Emacs is free software: you can redistribute it and/or modify
  16 ;; it under the terms of the GNU General Public License as published by
  17 ;; the Free Software Foundation, either version 3 of the License, or
  18 ;; (at your option) any later version.
  19
  20 ;; GNU Emacs is distributed in the hope that it will be useful,
  21 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 ;; GNU General Public License for more details.
  24
  25 ;; You should have received a copy of the GNU General Public License
  26 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  27
  28 ;; ======================================================================
  29 ;;; Commentary:
  30
  31 ;; See newsticker.el
  32
  33 ;; ======================================================================
  34 ;;; Code:
  35
  36 (require 'newsticker-ticker "newst-ticker")
  37 (require 'newsticker-reader "newst-reader")
  38 (require 'derived)
  39 (require 'xml)
  40
  41 ;; Silence warnings
  42 (defvar w3-mode-map)
  43 (defvar w3m-minor-mode-map)
  44
  45 ;; ======================================================================
  46 ;;; Customization
  47 ;; ======================================================================
  48 (defgroup newsticker-plainview nil
  49   "Settings for the simple plain view reader.
  50 See also `newsticker-plainview-hooks'."
  51   :group 'newsticker-reader)
  52
  53
  54 (defun newsticker--set-customvar-buffer (symbol value)
  55   "Set newsticker-variable SYMBOL value to VALUE.
  56 Calls all actions which are necessary in order to make the new
  57 value effective."
  58   (if (or (not (boundp symbol))
  59           (equal (symbol-value symbol) value))
  60       (set symbol value)
  61     ;; something must have changed
  62     (set symbol value)
  63     (newsticker--buffer-set-uptodate nil)))
  64
  65 (defun newsticker--set-customvar-sorting (symbol value)
  66   "Set newsticker-variable SYMBOL value to VALUE.
  67 Calls all actions which are necessary in order to make the new
  68 value effective."
  69   (if (or (not (boundp symbol))
  70           (equal (symbol-value symbol) value))
  71       (set symbol value)
  72     ;; something must have changed
  73     (set symbol value)
  74     (message "Applying new sort method...")
  75     (when (fboundp 'newsticker--cache-sort) (newsticker--cache-sort))
  76     (when (fboundp 'newsticker--buffer-set-uptodate)
  77       (newsticker--buffer-set-uptodate nil))
  78     (message "Applying new sort method...done")))
  79
  80 (defcustom newsticker-sort-method
  81   'sort-by-original-order
  82   "Sort method for news items.
  83 The following sort methods are available:
  84 * `sort-by-original-order' keeps the order in which the items
  85   appear in the headline file (please note that for immortal items,
  86   which have been removed from the news feed, there is no original
  87   order),
  88 * `sort-by-time' looks at the time at which an item has been seen
  89   the first time.  The most recent item is put at top,
  90 * `sort-by-title' will put the items in an alphabetical order."
  91   :type '(choice
  92           (const :tag "Keep original order" sort-by-original-order)
  93           (const :tag "Sort by time"        sort-by-time)
  94           (const :tag "Sort by title"       sort-by-title))
  95   :set 'newsticker--set-customvar-sorting
  96   :group 'newsticker-plainview)
  97
  98 (defcustom newsticker-heading-format
  99   "%l
 100 %t %d %s"
 101   "Format string for feed headings.
 102 The following printf-like specifiers can be used:
 103 %d  The date the feed was retrieved.  See `newsticker-date-format'.
 104 %l  The logo (image) of the feed.  Most news feeds provide a small
 105     image as logo.  Newsticker can display them, if Emacs can --
 106     see `image-types' for a list of supported image types.
 107 %L  The logo (image) of the feed.  If the logo is not available
 108     the title of the feed is used.
 109 %s  The statistical data of the feed.  See `newsticker-statistics-format'.
 110 %t  The title of the feed, i.e. its name."
 111   :type 'string
 112   :set 'newsticker--set-customvar-formatting
 113   :group 'newsticker-plainview)
 114
 115 (defcustom newsticker-item-format
 116   "%t %d"
 117   "Format string for news item headlines.
 118 The following printf-like specifiers can be used:
 119 %d  The date the item was (first) retrieved.  See `newsticker-date-format'.
 120 %l  The logo (image) of the feed.  Most news feeds provide a small
 121     image as logo.  Newsticker can display them, if Emacs can --
 122     see `image-types' for a list of supported image types.
 123 %L  The logo (image) of the feed.  If the logo is not available
 124     the title of the feed is used.
 125 %t  The title of the item."
 126   :type 'string
 127   :set 'newsticker--set-customvar-formatting
 128   :group 'newsticker-plainview)
 129
 130 (defcustom newsticker-desc-format
 131   "%d %c"
 132   "Format string for news descriptions (contents).
 133 The following printf-like specifiers can be used:
 134 %c  The contents (description) of the item.
 135 %d  The date the item was (first) retrieved.  See
 136     `newsticker-date-format'."
 137   :type 'string
 138   :set 'newsticker--set-customvar-formatting
 139   :group 'newsticker-plainview)
 140
 141 (defcustom newsticker-statistics-format
 142   "[%n + %i + %o + %O = %a]"
 143   "Format for the statistics part in feed lines.
 144 The following printf-like specifiers can be used:
 145 %a  The number of all items in the feed.
 146 %i  The number of immortal items in the feed.
 147 %n  The number of new items in the feed.
 148 %o  The number of old items in the feed.
 149 %O  The number of obsolete items in the feed."
 150   :type 'string
 151   :set 'newsticker--set-customvar-formatting
 152   :group 'newsticker-plainview)
 153
 154
 155 ;; ======================================================================
 156 ;; faces
 157
 158 (defface newsticker-new-item-face
 159   '((((class color) (background dark))
 160      (:family "helvetica" :bold t))
 161     (((class color) (background light))
 162      (:family "helvetica" :bold t)))
 163   "Face for new news items."
 164   :group 'newsticker-faces)
 165
 166 (defface newsticker-old-item-face
 167   '((((class color) (background dark))
 168      (:family "helvetica" :bold t :foreground "orange3"))
 169     (((class color) (background light))
 170      (:family "helvetica" :bold t :foreground "red4")))
 171   "Face for old news items."
 172   :group 'newsticker-faces)
 173
 174 (defface newsticker-immortal-item-face
 175   '((((class color) (background dark))
 176      (:family "helvetica" :bold t :italic t :foreground "orange"))
 177     (((class color) (background light))
 178      (:family "helvetica" :bold t :italic t :foreground "blue")))
 179   "Face for immortal news items."
 180   :group 'newsticker-faces)
 181
 182 (defface newsticker-obsolete-item-face
 183   '((((class color) (background dark))
 184      (:family "helvetica" :bold t :strike-through t))
 185     (((class color) (background light))
 186      (:family "helvetica" :bold t :strike-through t)))
 187   "Face for old news items."
 188   :group 'newsticker-faces)
 189
 190 (defface newsticker-date-face
 191   '((((class color) (background dark))
 192      (:family "helvetica" :italic t :height 0.8))
 193     (((class color) (background light))
 194      (:family "helvetica" :italic t :height 0.8)))
 195   "Face for newsticker dates."
 196   :group 'newsticker-faces)
 197
 198 (defface newsticker-statistics-face
 199   '((((class color) (background dark))
 200      (:family "helvetica" :italic t :height 0.8))
 201     (((class color) (background light))
 202      (:family "helvetica" :italic t :height 0.8)))
 203   "Face for newsticker dates."
 204   :group 'newsticker-faces)
 205
 206 (defface newsticker-default-face
 207   '((((class color) (background dark))
 208      (:inherit default))
 209     (((class color) (background light))
 210      (:inherit default)))
 211   "Face for the description of news items."
 212   ;;:set 'newsticker--set-customvar
 213   :group 'newsticker-faces)
 214
 215 (defcustom newsticker-hide-old-items-in-newsticker-buffer
 216   nil
 217   "Decides whether to automatically hide old items in the *newsticker* buffer.
 218 If set to t old items will be completely folded and only new
 219 items will show up in the *newsticker* buffer.  Otherwise old as
 220 well as new items will be visible."
 221   :type 'boolean
 222   :set 'newsticker--set-customvar-buffer
 223   :group 'newsticker-plainview)
 224
 225 (defcustom newsticker-show-descriptions-of-new-items
 226   t
 227   "Whether to automatically show descriptions of new items in *newsticker*.
 228 If set to t old items will be folded and new items will be
 229 unfolded.  Otherwise old as well as new items will be folded."
 230   :type 'boolean
 231   :set 'newsticker--set-customvar-buffer
 232   :group 'newsticker-plainview)
 233
 234 (defcustom newsticker-show-all-news-elements
 235   nil
 236   "Show all news elements."
 237   :type 'boolean
 238   ;;:set 'newsticker--set-customvar
 239   :group 'newsticker-plainview)
 240
 241 ;; ======================================================================
 242 ;; hooks
 243 (defgroup newsticker-plainview-hooks nil
 244   "Settings for newsticker hooks which apply to plainview only."
 245   :group 'newsticker-hooks)
 246
 247 (defcustom newsticker-select-item-hook
 248   'newsticker--buffer-make-item-completely-visible
 249   "List of functions run after a headline has been selected.
 250 Each function is called after one of `newsticker-next-item',
 251 `newsticker-next-new-item', `newsticker-previous-item',
 252 `newsticker-previous-new-item' has been called.
 253
 254 The default value 'newsticker--buffer-make-item-completely-visible
 255 assures that the current item is always completely visible."
 256   :type 'hook
 257   :options '(newsticker--buffer-make-item-completely-visible)
 258   :group 'newsticker-plainview-hooks)
 259
 260 (defcustom newsticker-select-feed-hook
 261   'newsticker--buffer-make-item-completely-visible
 262   "List of functions run after a feed has been selected.
 263 Each function is called after one of `newsticker-next-feed', and
 264 `newsticker-previous-feed' has been called.
 265
 266 The default value 'newsticker--buffer-make-item-completely-visible
 267 assures that the current feed is completely visible."
 268   :type 'hook
 269   :options '(newsticker--buffer-make-item-completely-visible)
 270   :group 'newsticker-plainview-hooks)
 271
 272 (defcustom newsticker-buffer-change-hook
 273   'newsticker-w3m-show-inline-images
 274   "List of functions run after the newsticker buffer has been updated.
 275 Each function is called after `newsticker-buffer-update' has been called.
 276
 277 The default value '`newsticker-w3m-show-inline-images' loads inline
 278 images."
 279   :type 'hook
 280   :group 'newsticker-plainview-hooks)
 281
 282 (defcustom newsticker-narrow-hook
 283   'newsticker-w3m-show-inline-images
 284   "List of functions run after narrowing in newsticker buffer has changed.
 285 Each function is called after
 286 `newsticker-toggle-auto-narrow-to-feed' or
 287 `newsticker-toggle-auto-narrow-to-item' has been called.
 288
 289 The default value '`newsticker-w3m-show-inline-images' loads inline
 290 images."
 291   :type 'hook
 292   :group 'newsticker-plainview-hooks)
 293
 294 ;; ======================================================================
 295 ;;; Toolbar
 296 ;; ======================================================================
 297
 298 (defvar newsticker--plainview-tool-bar-map
 299   (if (featurep 'xemacs)
 300       nil
 301     (if (boundp 'tool-bar-map)
 302         (let ((tool-bar-map (make-sparse-keymap)))
 303           (define-key tool-bar-map [newsticker-sep-1]
 304             (list 'menu-item "--double-line"))
 305           (define-key tool-bar-map [newsticker-browse-url]
 306             (list 'menu-item "newsticker-browse-url" 'newsticker-browse-url
 307                   :visible t
 308                   :help "Browse URL for item at point"
 309                   :image newsticker--browse-image))
 310           (define-key tool-bar-map [newsticker-buffer-force-update]
 311             (list 'menu-item "newsticker-buffer-force-update"
 312                   'newsticker-buffer-force-update
 313                   :visible t
 314                   :help "Update newsticker buffer"
 315                   :image newsticker--update-image
 316                   :enable '(not newsticker--buffer-uptodate-p)))
 317           (define-key tool-bar-map [newsticker-get-all-news]
 318             (list 'menu-item "newsticker-get-all-news" 'newsticker-get-all-news
 319                   :visible t
 320                   :help "Get news for all feeds"
 321                   :image newsticker--get-all-image))
 322           (define-key tool-bar-map [newsticker-mark-item-at-point-as-read]
 323             (list 'menu-item "newsticker-mark-item-at-point-as-read"
 324                   'newsticker-mark-item-at-point-as-read
 325                   :visible t
 326                   :image newsticker--mark-read-image
 327                   :help "Mark current item as read"
 328                   :enable '(newsticker-item-not-old-p)))
 329           (define-key tool-bar-map [newsticker-mark-item-at-point-as-immortal]
 330             (list 'menu-item "newsticker-mark-item-at-point-as-immortal"
 331                   'newsticker-mark-item-at-point-as-immortal
 332                   :visible t
 333                   :image newsticker--mark-immortal-image
 334                   :help "Mark current item as immortal"
 335                   :enable '(newsticker-item-not-immortal-p)))
 336           (define-key tool-bar-map [newsticker-toggle-auto-narrow-to-feed]
 337             (list 'menu-item "newsticker-toggle-auto-narrow-to-feed"
 338                   'newsticker-toggle-auto-narrow-to-feed
 339                   :visible t
 340                   :help "Toggle visibility of other feeds"
 341                   :image newsticker--narrow-image))
 342           (define-key tool-bar-map [newsticker-next-feed]
 343             (list 'menu-item "newsticker-next-feed" 'newsticker-next-feed
 344                   :visible t
 345                   :help "Go to next feed"
 346                   :image newsticker--next-feed-image
 347                   :enable '(newsticker-next-feed-available-p)))
 348           (define-key tool-bar-map [newsticker-next-item]
 349             (list 'menu-item "newsticker-next-item" 'newsticker-next-item
 350                   :visible t
 351                   :help "Go to next item"
 352                   :image newsticker--next-item-image
 353                   :enable '(newsticker-next-item-available-p)))
 354           (define-key tool-bar-map [newsticker-previous-item]
 355             (list 'menu-item "newsticker-previous-item" 'newsticker-previous-item
 356                   :visible t
 357                   :help "Go to previous item"
 358                   :image newsticker--previous-item-image
 359                   :enable '(newsticker-previous-item-available-p)))
 360           (define-key tool-bar-map [newsticker-previous-feed]
 361             (list 'menu-item "newsticker-previous-feed" 'newsticker-previous-feed
 362                   :visible t
 363                   :help "Go to previous feed"
 364                   :image newsticker--previous-feed-image
 365                   :enable '(newsticker-previous-feed-available-p)))
 366           ;; standard icons / actions
 367           (tool-bar-add-item "close"
 368                              'newsticker-close-buffer
 369                              'newsticker-close-buffer
 370                              :help "Close newsticker buffer")
 371           (tool-bar-add-item "preferences"
 372                              'newsticker-customize
 373                              'newsticker-customize
 374                              :help "Customize newsticker")
 375           tool-bar-map))))
 376
 377 ;; ======================================================================
 378 ;;; Newsticker mode
 379 ;; ======================================================================
 380
 381 (define-derived-mode newsticker-mode fundamental-mode
 382   "NewsTicker"
 383   "Viewing news feeds in Emacs."
 384   (if (boundp 'tool-bar-map)
 385       (set (make-local-variable 'tool-bar-map)
 386            newsticker--plainview-tool-bar-map))
 387   (set (make-local-variable 'imenu-sort-function) nil)
 388   (set (make-local-variable 'scroll-conservatively) 999)
 389   (setq imenu-create-index-function 'newsticker--imenu-create-index)
 390   (setq imenu-default-goto-function 'newsticker--imenu-goto)
 391   (setq buffer-read-only t)
 392   (auto-fill-mode -1) ;; turn auto-fill off!
 393   (font-lock-mode -1) ;; turn off font-lock!!
 394   (set (make-local-variable 'font-lock-defaults) nil)
 395   (set (make-local-variable 'line-move-ignore-invisible) t)
 396   (setq mode-line-format
 397         (list "-"
 398               'mode-line-mule-info
 399               'mode-line-modified
 400               'mode-line-frame-identification
 401               " Newsticker ("
 402               '(newsticker--buffer-uptodate-p
 403                 "up to date"
 404                 "NEED UPDATE")
 405               ") "
 406               '(:eval (format "[%d]" (length newsticker--process-ids)))
 407               " -- "
 408               '(:eval (newsticker--buffer-get-feed-title-at-point))
 409               ": "
 410               '(:eval (newsticker--buffer-get-item-title-at-point))
 411               " %-"))
 412   (add-to-invisibility-spec 't)
 413   (unless newsticker-show-all-news-elements
 414     (add-to-invisibility-spec 'extra))
 415   (newsticker--buffer-set-uptodate nil))
 416
 417 ;; refine its mode-map
 418 (define-key newsticker-mode-map "sO" 'newsticker-show-old-items)
 419 (define-key newsticker-mode-map "hO" 'newsticker-hide-old-items)
 420 (define-key newsticker-mode-map "sa" 'newsticker-show-all-desc)
 421 (define-key newsticker-mode-map "ha" 'newsticker-hide-all-desc)
 422 (define-key newsticker-mode-map "sf" 'newsticker-show-feed-desc)
 423 (define-key newsticker-mode-map "hf" 'newsticker-hide-feed-desc)
 424 (define-key newsticker-mode-map "so" 'newsticker-show-old-item-desc)
 425 (define-key newsticker-mode-map "ho" 'newsticker-hide-old-item-desc)
 426 (define-key newsticker-mode-map "sn" 'newsticker-show-new-item-desc)
 427 (define-key newsticker-mode-map "hn" 'newsticker-hide-new-item-desc)
 428 (define-key newsticker-mode-map "se" 'newsticker-show-entry)
 429 (define-key newsticker-mode-map "he" 'newsticker-hide-entry)
 430 (define-key newsticker-mode-map "sx" 'newsticker-show-extra)
 431 (define-key newsticker-mode-map "hx" 'newsticker-hide-extra)
 432
 433 (define-key newsticker-mode-map " "  'scroll-up)
 434 (define-key newsticker-mode-map "q"  'newsticker-close-buffer)
 435 (define-key newsticker-mode-map "p"  'newsticker-previous-item)
 436 (define-key newsticker-mode-map "P"  'newsticker-previous-new-item)
 437 (define-key newsticker-mode-map "F"  'newsticker-previous-feed)
 438 (define-key newsticker-mode-map "\t" 'newsticker-next-item)
 439 (define-key newsticker-mode-map "n"  'newsticker-next-item)
 440 (define-key newsticker-mode-map "N"  'newsticker-next-new-item)
 441 (define-key newsticker-mode-map "f"  'newsticker-next-feed)
 442 (define-key newsticker-mode-map "M"  'newsticker-mark-all-items-as-read)
 443 (define-key newsticker-mode-map "m"
 444   'newsticker-mark-all-items-at-point-as-read-and-redraw)
 445 (define-key newsticker-mode-map "o"
 446   'newsticker-mark-item-at-point-as-read)
 447 (define-key newsticker-mode-map "O"
 448   'newsticker-mark-all-items-at-point-as-read)
 449 (define-key newsticker-mode-map "G"  'newsticker-get-all-news)
 450 (define-key newsticker-mode-map "g"  'newsticker-get-news-at-point)
 451 (define-key newsticker-mode-map "u"  'newsticker-buffer-update)
 452 (define-key newsticker-mode-map "U"  'newsticker-buffer-force-update)
 453 (define-key newsticker-mode-map "a"  'newsticker-add-url)
 454
 455 (define-key newsticker-mode-map "i"
 456   'newsticker-mark-item-at-point-as-immortal)
 457
 458 (define-key newsticker-mode-map "xf"
 459   'newsticker-toggle-auto-narrow-to-feed)
 460 (define-key newsticker-mode-map "xi"
 461   'newsticker-toggle-auto-narrow-to-item)
 462
 463 ;; maps for the clickable portions
 464 (defvar newsticker--url-keymap (make-sparse-keymap)
 465   "Key map for click-able headings in the newsticker buffer.")
 466 (define-key newsticker--url-keymap [mouse-1]
 467   'newsticker-mouse-browse-url)
 468 (define-key newsticker--url-keymap [mouse-2]
 469   'newsticker-mouse-browse-url)
 470 (define-key newsticker--url-keymap "\n"
 471   'newsticker-browse-url)
 472 (define-key newsticker--url-keymap "\C-m"
 473   'newsticker-browse-url)
 474 (define-key newsticker--url-keymap [(control return)]
 475   'newsticker-handle-url)
 476
 477 ;; newsticker menu
 478 (defvar newsticker-menu (make-sparse-keymap "Newsticker"))
 479
 480 (define-key newsticker-menu [newsticker-browse-url]
 481   '("Browse URL for item at point" . newsticker-browse-url))
 482 (define-key newsticker-menu [newsticker-separator-1]
 483   '("--"))
 484 (define-key newsticker-menu [newsticker-buffer-update]
 485   '("Update buffer" . newsticker-buffer-update))
 486 (define-key newsticker-menu [newsticker-separator-2]
 487   '("--"))
 488 (define-key newsticker-menu [newsticker-get-all-news]
 489   '("Get news from all feeds" . newsticker-get-all-news))
 490 (define-key newsticker-menu [newsticker-get-news-at-point]
 491   '("Get news from feed at point" . newsticker-get-news-at-point))
 492 (define-key newsticker-menu [newsticker-separator-3]
 493   '("--"))
 494 (define-key newsticker-menu [newsticker-mark-all-items-as-read]
 495   '("Mark all items as read" . newsticker-mark-all-items-as-read))
 496 (define-key newsticker-menu [newsticker-mark-all-items-at-point-as-read]
 497   '("Mark all items in feed at point as read" .
 498     newsticker-mark-all-items-at-point-as-read))
 499 (define-key newsticker-menu [newsticker-mark-item-at-point-as-read]
 500   '("Mark item at point as read" .
 501     newsticker-mark-item-at-point-as-read))
 502 (define-key newsticker-menu [newsticker-mark-item-at-point-as-immortal]
 503   '("Toggle immortality for item at point" .
 504     newsticker-mark-item-at-point-as-immortal))
 505 (define-key newsticker-menu [newsticker-separator-4]
 506   '("--"))
 507 (define-key newsticker-menu [newsticker-toggle-auto-narrow-to-item]
 508   '("Narrow to single item" . newsticker-toggle-auto-narrow-to-item))
 509 (define-key newsticker-menu [newsticker-toggle-auto-narrow-to-feed]
 510   '("Narrow to single news feed" . newsticker-toggle-auto-narrow-to-feed))
 511 (define-key newsticker-menu [newsticker-hide-old-items]
 512   '("Hide old items" . newsticker-hide-old-items))
 513 (define-key newsticker-menu [newsticker-show-old-items]
 514   '("Show old items" . newsticker-show-old-items))
 515 (define-key newsticker-menu [newsticker-next-item]
 516   '("Go to next item" . newsticker-next-item))
 517 (define-key newsticker-menu [newsticker-previous-item]
 518   '("Go to previous item" . newsticker-previous-item))
 519
 520 ;; bind menu to mouse
 521 (define-key newsticker-mode-map [down-mouse-3] newsticker-menu)
 522 ;; Put menu in menu-bar
 523 (define-key newsticker-mode-map [menu-bar Newsticker]
 524   (cons "Newsticker" newsticker-menu))
 525
 526
 527 ;; ======================================================================
 528 ;;; User fun
 529 ;; ======================================================================
 530 ;;;###autoload
 531 (defun newsticker-plainview ()
 532   "Start newsticker plainview."
 533   (interactive)
 534   (newsticker-buffer-update t)
 535   (switch-to-buffer "*newsticker*"))
 536
 537 (defun newsticker-buffer-force-update ()
 538   "Update the newsticker buffer, even if not necessary."
 539   (interactive)
 540   (newsticker-buffer-update t))
 541
 542 (defun newsticker-buffer-update (&optional force)
 543   "Update the *newsticker* buffer.
 544 Unless FORCE is t this is done only if necessary, i.e. when the
 545 *newsticker* buffer is not up-to-date."
 546   (interactive)
 547   ;; bring cache data into proper order....
 548   (newsticker--cache-sort)
 549   ;; fill buffer
 550   (save-excursion
 551     (let ((buf (get-buffer "*newsticker*")))
 552       (if buf
 553           (switch-to-buffer buf)
 554         (switch-to-buffer (get-buffer-create "*newsticker*"))
 555         (newsticker--buffer-set-uptodate nil)))
 556    (when (or force
 557              (not newsticker--buffer-uptodate-p))
 558      (message "Preparing newsticker buffer...")
 559      (setq buffer-undo-list t)
 560      (let ((inhibit-read-only t))
 561        (set-buffer-modified-p nil)
 562        (erase-buffer)
 563        (newsticker-mode)
 564        ;; Emacs 21.3.50 does not care if we turn off auto-fill in the
 565        ;; definition of newsticker-mode, so we do it here (again)
 566        (auto-fill-mode -1)
 567
 568        (set-buffer-file-coding-system 'utf-8)
 569
 570        (if newsticker-use-full-width
 571            (set (make-local-variable 'fill-column) (1- (window-width))))
 572        (newsticker--buffer-insert-all-items)
 573
 574        ;; FIXME: needed for methods buffer in ecb
 575        ;; (set-visited-file-name "*newsticker*")
 576
 577        (set-buffer-modified-p nil)
 578         (newsticker-hide-all-desc)
 579         (if newsticker-hide-old-items-in-newsticker-buffer
 580             (newsticker-hide-old-items))
 581         (if newsticker-show-descriptions-of-new-items
 582             (newsticker-show-new-item-desc))
 583        )
 584      (message ""))
 585    (newsticker--buffer-set-uptodate t)
 586    (run-hooks 'newsticker-buffer-change-hook)))
 587
 588 (defun newsticker-get-news-at-point ()
 589   "Launch retrieval of news for the feed point is in.
 590 This does NOT start the retrieval timers."
 591   (interactive)
 592   ;; launch retrieval of news
 593   (let ((feed (get-text-property (point) 'feed)))
 594       (when feed
 595         (newsticker--debug-msg "Getting news for %s" (symbol-name feed))
 596         (newsticker-get-news (symbol-name feed)))))
 597
 598 (unless (fboundp 'declare-function) (defmacro declare-function (&rest r)))
 599 (declare-function w3m-toggle-inline-image "ext:w3m" (&optional force no-cache))
 600
 601 (defun newsticker-w3m-show-inline-images ()
 602   "Show inline images in visible text ranges.
 603 In-line images in invisible text ranges are hidden.  This function
 604 calls `w3m-toggle-inline-image'.  It works only if
 605 `newsticker-html-renderer' is set to `w3m-region'."
 606   (interactive)
 607   (if (eq newsticker-html-renderer 'w3m-region)
 608       (let ((inhibit-read-only t))
 609         (save-excursion
 610           (save-restriction
 611             (widen)
 612             (goto-char (point-min))
 613             (let ((pos (point)))
 614               (while pos
 615                 (setq pos (next-single-property-change pos 'w3m-image))
 616                 (when pos
 617                   (goto-char pos)
 618                   (when (get-text-property pos 'w3m-image)
 619                     (let ((invis (newsticker--lists-intersect-p
 620                                   (get-text-property (1- (point))
 621                                                      'invisible)
 622                                   buffer-invisibility-spec)))
 623                       (unless  (car (get-text-property (1- (point))
 624                                                        'display))
 625                         (unless invis
 626                           (w3m-toggle-inline-image t)))))))))))))
 627
 628 ;; ======================================================================
 629 ;;; Keymap stuff
 630 ;; ======================================================================
 631 (defun newsticker-close-buffer ()
 632   "Close the newsticker buffer."
 633   (interactive)
 634   (newsticker--cache-update t)
 635   (bury-buffer))
 636
 637 (defun newsticker-next-new-item (&optional do-not-wrap-at-eob)
 638   "Go to next new news item.
 639 If no new item is found behind point, search is continued at
 640 beginning of buffer unless optional argument DO-NOT-WRAP-AT-EOB
 641 is non-nil."
 642   (interactive)
 643   (widen)
 644   (let ((go-ahead t))
 645     (while go-ahead
 646       (unless (newsticker--buffer-goto '(item) 'new)
 647         ;; found nothing -- wrap
 648         (unless do-not-wrap-at-eob
 649           (goto-char (point-min))
 650           (newsticker-next-new-item t))
 651         (setq go-ahead nil))
 652       (unless (newsticker--lists-intersect-p
 653                (get-text-property (point) 'invisible)
 654                buffer-invisibility-spec)
 655         ;; this item is invisible -- continue search
 656         (setq go-ahead nil))))
 657   (run-hooks 'newsticker-select-item-hook)
 658   (point))
 659
 660 (defun newsticker-previous-new-item (&optional do-not-wrap-at-bob)
 661   "Go to previous new news item.
 662 If no new item is found before point, search is continued at
 663 beginning of buffer unless optional argument DO-NOT-WRAP-AT-BOB
 664 is non-nil."
 665   (interactive)
 666   (widen)
 667   (let ((go-ahead t))
 668     (while go-ahead
 669       (unless (newsticker--buffer-goto '(item) 'new t)
 670         (unless do-not-wrap-at-bob
 671           (goto-char (point-max))
 672           (newsticker--buffer-goto '(item) 'new t)))
 673       (unless (newsticker--lists-intersect-p
 674                (get-text-property (point) 'invisible)
 675                     buffer-invisibility-spec)
 676         (setq go-ahead nil))))
 677   (run-hooks 'newsticker-select-item-hook)
 678   (point))
 679
 680 (defun newsticker-next-item (&optional do-not-wrap-at-eob)
 681   "Go to next news item.
 682 Return new buffer position.
 683 If no item is found below point, search is continued at beginning
 684 of buffer unless optional argument DO-NOT-WRAP-AT-EOB is
 685 non-nil."
 686   (interactive)
 687   (widen)
 688   (let ((go-ahead t)
 689         (search-list '(item)))
 690     (if newsticker--auto-narrow-to-item
 691         (setq search-list '(item feed)))
 692     (while go-ahead
 693       (unless (newsticker--buffer-goto search-list)
 694         ;; found nothing -- wrap
 695         (unless do-not-wrap-at-eob
 696           (goto-char (point-min)))
 697         (setq go-ahead nil))
 698       (unless (newsticker--lists-intersect-p
 699                (get-text-property (point) 'invisible)
 700                     buffer-invisibility-spec)
 701         (setq go-ahead nil))))
 702   (run-hooks 'newsticker-select-item-hook)
 703   (force-mode-line-update)
 704   (point))
 705
 706 (defun newsticker-next-item-same-feed ()
 707   "Go to next news item in the same feed.
 708 Return new buffer position.  If no item is found below point or if
 709 auto-narrow-to-item is enabled, nil is returned."
 710   (interactive)
 711   (if newsticker--auto-narrow-to-item
 712       nil
 713     (let ((go-ahead t)
 714           (current-pos (point))
 715           (end-of-feed (save-excursion (newsticker--buffer-end-of-feed))))
 716       (while go-ahead
 717         (unless (newsticker--buffer-goto '(item))
 718           (setq go-ahead nil))
 719         (unless (newsticker--lists-intersect-p
 720                  (get-text-property (point) 'invisible)
 721                  buffer-invisibility-spec)
 722           (setq go-ahead nil)))
 723       (if (and (> (point) current-pos)
 724                (< (point) end-of-feed))
 725           (point)
 726         (goto-char current-pos)
 727         nil))))
 728
 729 (defun newsticker-previous-item (&optional do-not-wrap-at-bob)
 730   "Go to previous news item.
 731 Return new buffer position.
 732 If no item is found before point, search is continued at
 733 beginning of buffer unless optional argument DO-NOT-WRAP-AT-BOB
 734 is non-nil."
 735   (interactive)
 736   (widen)
 737   (let ((go-ahead t)
 738         (search-list '(item)))
 739     (if newsticker--auto-narrow-to-item
 740         (setq search-list '(item feed)))
 741     (when (bobp)
 742       (unless do-not-wrap-at-bob
 743         (goto-char (point-max))))
 744     (while go-ahead
 745       (if (newsticker--buffer-goto search-list nil t)
 746           (unless (newsticker--lists-intersect-p
 747                    (get-text-property (point) 'invisible)
 748                    buffer-invisibility-spec)
 749             (setq go-ahead nil))
 750         (goto-char (point-min))
 751         (setq go-ahead nil))))
 752   (run-hooks 'newsticker-select-item-hook)
 753   (force-mode-line-update)
 754   (point))
 755
 756 (defun newsticker-next-feed ()
 757   "Go to next news feed.
 758 Return new buffer position."
 759   (interactive)
 760   (widen)
 761   (newsticker--buffer-goto '(feed))
 762   (run-hooks 'newsticker-select-feed-hook)
 763   (force-mode-line-update)
 764   (point))
 765
 766 (defun newsticker-previous-feed ()
 767   "Go to previous news feed.
 768 Return new buffer position."
 769   (interactive)
 770   (widen)
 771   (newsticker--buffer-goto '(feed) nil t)
 772   (run-hooks 'newsticker-select-feed-hook)
 773   (force-mode-line-update)
 774   (point))
 775
 776 (defun newsticker-mark-all-items-at-point-as-read-and-redraw ()
 777   "Mark all items as read and clear ticker contents."
 778   (interactive)
 779   (when (or newsticker--buffer-uptodate-p
 780             (y-or-n-p
 781              "Buffer is not up to date -- really mark items as read? "))
 782     (newsticker-mark-all-items-of-feed-as-read
 783      (get-text-property (point) 'feed))))
 784
 785 (defun newsticker-mark-all-items-of-feed-as-read (feed)
 786   "Mark all items of FEED as read, clear ticker, and redraw buffer."
 787   (when feed
 788     (let ((pos (point)))
 789       (message "Marking all items as read for %s" (symbol-name feed))
 790       (newsticker--cache-replace-age newsticker--cache feed 'new 'old)
 791       (newsticker--cache-replace-age newsticker--cache feed 'obsolete
 792                                      'old)
 793       (newsticker--cache-update)
 794       (newsticker--buffer-set-uptodate nil)
 795       (newsticker--ticker-text-setup)
 796       (newsticker-buffer-update)
 797       ;; go back to where we came frome
 798       (goto-char pos)
 799       (end-of-line)
 800       (newsticker--buffer-goto '(feed) nil t))))
 801
 802 (defun newsticker-mark-all-items-at-point-as-read ()
 803   "Mark all items as read and clear ticker contents."
 804   (interactive)
 805   (when (or newsticker--buffer-uptodate-p
 806             (y-or-n-p
 807              "Buffer is not up to date -- really mark items as read? "))
 808     (newsticker--do-mark-item-at-point-as-read t)
 809     (while (newsticker-next-item-same-feed)
 810       (newsticker--do-mark-item-at-point-as-read t))
 811     (newsticker-next-item t)))
 812
 813 (defun newsticker-mark-item-at-point-as-read (&optional respect-immortality)
 814   "Mark item at point as read and move to next item.
 815 If optional argument RESPECT-IMMORTALITY is not nil immortal items do
 816 not get changed."
 817   (interactive)
 818   (when (or newsticker--buffer-uptodate-p
 819             (y-or-n-p
 820              "Buffer is not up to date -- really mark this item as read? "))
 821     (newsticker--do-mark-item-at-point-as-read respect-immortality)
 822     ;; move forward
 823     (newsticker-next-item t)))
 824
 825 (defun newsticker--do-mark-item-at-point-as-read (&optional respect-immortality)
 826   "Mark item at point as read.
 827 If optional argument RESPECT-IMMORTALITY is not nil immortal items do
 828 not get changed."
 829   (let ((feed (get-text-property (point) 'feed)))
 830     (when feed
 831       (save-excursion
 832         (newsticker--buffer-beginning-of-item)
 833         (let ((inhibit-read-only t)
 834               (age (get-text-property (point) 'nt-age))
 835               (title (get-text-property (point) 'nt-title))
 836               (guid (get-text-property (point) 'nt-guid))
 837               (nt-desc (get-text-property (point) 'nt-desc))
 838               (pos (save-excursion (newsticker--buffer-end-of-item)))
 839               item)
 840           (when (or (eq age 'new)
 841                     (eq age 'obsolete)
 842                     (and (eq age 'immortal)
 843                          (not respect-immortality)))
 844             ;; find item
 845             (setq item (newsticker--cache-contains newsticker--cache
 846                                                    feed title nt-desc
 847                                                    nil nil guid))
 848             ;; mark as old
 849             (when item
 850               (setcar (nthcdr 4 item) 'old)
 851               (newsticker--do-forget-preformatted item))
 852             ;; clean up ticker
 853             (if (or (and (eq age 'new)
 854                          newsticker-hide-immortal-items-in-echo-area)
 855                     (and (memq age '(old immortal))
 856                          (not
 857                           (eq newsticker-hide-old-items-in-newsticker-buffer
 858                               newsticker-hide-immortal-items-in-echo-area))))
 859                 (newsticker--ticker-text-remove feed title))
 860             ;; set faces etc.
 861             (save-excursion
 862               (save-restriction
 863                 (widen)
 864                 (put-text-property (point) pos 'nt-age 'old)
 865                 (newsticker--buffer-set-faces (point) pos)))
 866             (set-buffer-modified-p nil)))))))
 867
 868 (defun newsticker-mark-item-at-point-as-immortal ()
 869   "Mark item at point as read."
 870   (interactive)
 871   (when (or newsticker--buffer-uptodate-p
 872             (y-or-n-p
 873              "Buffer is not up to date -- really mark this item as read? "))
 874     (let ((feed (get-text-property (point) 'feed))
 875           (item nil))
 876       (when feed
 877         (save-excursion
 878           (newsticker--buffer-beginning-of-item)
 879           (let ((inhibit-read-only t)
 880                 (oldage (get-text-property (point) 'nt-age))
 881                 (title (get-text-property (point) 'nt-title))
 882                 (guid (get-text-property (point) 'nt-guid))
 883                 (pos  (save-excursion (newsticker--buffer-end-of-item))))
 884             (let ((newage 'immortal))
 885               (if (eq oldage 'immortal)
 886                   (setq newage 'old))
 887               (setq item (newsticker--cache-contains newsticker--cache
 888                                                      feed title nil nil nil
 889                                                      guid))
 890               ;; change age
 891               (when item
 892                 (setcar (nthcdr 4 item) newage)
 893                 (newsticker--do-forget-preformatted item))
 894               (if (or (and (eq newage 'immortal)
 895                            newsticker-hide-immortal-items-in-echo-area)
 896                       (and (eq newage 'obsolete)
 897                            newsticker-hide-obsolete-items-in-echo-area)
 898                       (and (eq oldage 'immortal)
 899                            (not
 900                             (eq newsticker-hide-old-items-in-newsticker-buffer
 901                                 newsticker-hide-immortal-items-in-echo-area))))
 902                   (newsticker--ticker-text-remove feed title)
 903                 (newsticker--ticker-text-setup))
 904               (save-excursion
 905                 (save-restriction
 906                   (widen)
 907                   (put-text-property (point) pos 'nt-age newage)
 908                   (if (eq newage 'immortal)
 909                       (put-text-property (point) pos 'nt-age 'immortal)
 910                     (put-text-property (point) pos 'nt-age 'old))
 911                   (newsticker--buffer-set-faces (point) pos))))))
 912           (if item
 913             (newsticker-next-item t))))))
 914
 915 (defun newsticker-mark-all-items-as-read ()
 916   "Mark all items as read and clear ticker contents."
 917   (interactive)
 918   (when (or newsticker--buffer-uptodate-p
 919             (y-or-n-p
 920              "Buffer is not up to date -- really mark items as read? "))
 921     (newsticker--cache-replace-age newsticker--cache 'any 'new 'old)
 922     (newsticker--buffer-set-uptodate nil)
 923     (newsticker--ticker-text-setup)
 924     (newsticker--cache-update)
 925     (newsticker-buffer-update)))
 926
 927 (defun newsticker-hide-extra ()
 928   "Hide the extra elements of items."
 929   (interactive)
 930   (newsticker--buffer-hideshow 'extra nil)
 931   (newsticker--buffer-redraw))
 932
 933 (defun newsticker-show-extra ()
 934   "Show the extra elements of items."
 935   (interactive)
 936   (newsticker--buffer-hideshow 'extra t)
 937   (newsticker--buffer-redraw))
 938
 939 (defun newsticker-hide-old-item-desc ()
 940   "Hide the description of old items."
 941   (interactive)
 942   (newsticker--buffer-hideshow 'desc-old nil)
 943   (newsticker--buffer-redraw))
 944
 945 (defun newsticker-show-old-item-desc ()
 946   "Show the description of old items."
 947   (interactive)
 948   (newsticker--buffer-hideshow 'item-old t)
 949   (newsticker--buffer-hideshow 'desc-old t)
 950   (newsticker--buffer-redraw))
 951
 952 (defun newsticker-hide-new-item-desc ()
 953   "Hide the description of new items."
 954   (interactive)
 955   (newsticker--buffer-hideshow 'desc-new nil)
 956   (newsticker--buffer-hideshow 'desc-immortal nil)
 957   (newsticker--buffer-hideshow 'desc-obsolete nil)
 958   (newsticker--buffer-redraw))
 959
 960 (defun newsticker-show-new-item-desc ()
 961   "Show the description of new items."
 962   (interactive)
 963   (newsticker--buffer-hideshow 'desc-new t)
 964   (newsticker--buffer-hideshow 'desc-immortal t)
 965   (newsticker--buffer-hideshow 'desc-obsolete t)
 966   (newsticker--buffer-redraw))
 967
 968 (defun newsticker-hide-feed-desc ()
 969   "Hide the description of feeds."
 970   (interactive)
 971   (newsticker--buffer-hideshow 'desc-feed nil)
 972   (newsticker--buffer-redraw))
 973
 974 (defun newsticker-show-feed-desc ()
 975   "Show the description of old items."
 976   (interactive)
 977   (newsticker--buffer-hideshow 'desc-feed t)
 978   (newsticker--buffer-redraw))
 979
 980 (defun newsticker-hide-all-desc ()
 981   "Hide the descriptions of feeds and all items."
 982   (interactive)
 983   (newsticker--buffer-hideshow 'desc-feed nil)
 984   (newsticker--buffer-hideshow 'desc-immortal nil)
 985   (newsticker--buffer-hideshow 'desc-obsolete nil)
 986   (newsticker--buffer-hideshow 'desc-new  nil)
 987   (newsticker--buffer-hideshow 'desc-old  nil)
 988   (newsticker--buffer-redraw))
 989
 990 (defun newsticker-show-all-desc ()
 991   "Show the descriptions of feeds and all items."
 992   (interactive)
 993   (newsticker--buffer-hideshow 'desc-feed t)
 994   (newsticker--buffer-hideshow 'desc-immortal  t)
 995   (newsticker--buffer-hideshow 'desc-obsolete  t)
 996   (newsticker--buffer-hideshow 'desc-new  t)
 997   (newsticker--buffer-hideshow 'desc-old  t)
 998   (newsticker--buffer-redraw))
 999
1000 (defun newsticker-hide-old-items ()
1001   "Hide old items."
1002   (interactive)
1003   (newsticker--buffer-hideshow 'desc-old nil)
1004   (newsticker--buffer-hideshow 'item-old nil)
1005   (newsticker--buffer-redraw))
1006
1007 (defun newsticker-show-old-items ()
1008   "Show old items."
1009   (interactive)
1010   (newsticker--buffer-hideshow 'item-old t)
1011   (newsticker--buffer-redraw))
1012
1013 (defun newsticker-hide-entry ()
1014   "Hide description of entry at point."
1015   (interactive)
1016   (save-excursion
1017     (let* (pos1 pos2
1018                 (inhibit-read-only t)
1019                 inv-prop org-inv-prop
1020                 is-invisible)
1021       (newsticker--buffer-beginning-of-item)
1022       (newsticker--buffer-goto '(desc))
1023       (setq pos1 (max (point-min) (1- (point))))
1024       (newsticker--buffer-goto '(extra feed item nil))
1025       (setq pos2 (max (point-min) (1- (point))))
1026       (setq inv-prop (get-text-property pos1 'invisible))
1027       (setq org-inv-prop (get-text-property pos1 'org-invisible))
1028       (cond ((eq inv-prop t)
1029              ;; do nothing
1030              )
1031             ((eq org-inv-prop nil)
1032              (add-text-properties pos1 pos2
1033                                   (list 'invisible (list t)
1034                                         'org-invisible inv-prop)))
1035             (t
1036              ;; toggle
1037              (add-text-properties pos1 pos2
1038                                   (list 'invisible org-inv-prop))
1039              (remove-text-properties pos1 pos2 '(org-invisible))))))
1040   (newsticker--buffer-redraw))
1041
1042 (defun newsticker-show-entry ()
1043   "Show description of entry at point."
1044   (interactive)
1045   (save-excursion
1046     (let* (pos1 pos2
1047                 (inhibit-read-only t)
1048                 inv-prop org-inv-prop
1049                 is-invisible)
1050       (newsticker--buffer-beginning-of-item)
1051       (newsticker--buffer-goto '(desc))
1052       (setq pos1 (max (point-min) (1- (point))))
1053       (newsticker--buffer-goto '(extra feed item))
1054       (setq pos2 (max (point-min) (1- (point))))
1055       (setq inv-prop (get-text-property pos1 'invisible))
1056       (setq org-inv-prop (get-text-property pos1 'org-invisible))
1057       (cond ((eq org-inv-prop nil)
1058              (add-text-properties pos1 pos2
1059                                   (list 'invisible nil
1060                                         'org-invisible inv-prop)))
1061             (t
1062              ;; toggle
1063              (add-text-properties pos1 pos2
1064                                   (list 'invisible org-inv-prop))
1065              (remove-text-properties pos1 pos2 '(org-invisible))))))
1066   (newsticker--buffer-redraw))
1067
1068 (defun newsticker-toggle-auto-narrow-to-feed ()
1069   "Toggle narrowing to current news feed.
1070 If auto-narrowing is active, only news item of the current feed
1071 are visible."
1072   (interactive)
1073   (newsticker-set-auto-narrow-to-feed
1074    (not newsticker--auto-narrow-to-feed)))
1075
1076 (defun newsticker-set-auto-narrow-to-feed (value)
1077   "Turn narrowing to current news feed on or off.
1078 If VALUE is nil, auto-narrowing is turned off, otherwise it is turned on."
1079   (interactive)
1080   (setq newsticker--auto-narrow-to-item nil)
1081   (setq newsticker--auto-narrow-to-feed value)
1082   (widen)
1083   (newsticker--buffer-make-item-completely-visible)
1084   (run-hooks 'newsticker-narrow-hook))
1085
1086 (defun newsticker-toggle-auto-narrow-to-item ()
1087   "Toggle narrowing to current news item.
1088 If auto-narrowing is active, only one item of the current feed
1089 is visible."
1090   (interactive)
1091   (newsticker-set-auto-narrow-to-item
1092    (not newsticker--auto-narrow-to-item)))
1093
1094 (defun newsticker-set-auto-narrow-to-item (value)
1095   "Turn narrowing to current news item on or off.
1096 If VALUE is nil, auto-narrowing is turned off, otherwise it is turned on."
1097   (interactive)
1098   (setq newsticker--auto-narrow-to-feed nil)
1099   (setq newsticker--auto-narrow-to-item value)
1100   (widen)
1101   (newsticker--buffer-make-item-completely-visible)
1102   (run-hooks 'newsticker-narrow-hook))
1103
1104 (defun newsticker-next-feed-available-p ()
1105   "Return t if position is before last feed, nil otherwise."
1106   (save-excursion
1107     (let ((p (point)))
1108       (newsticker--buffer-goto '(feed))
1109       (not (= p (point))))))
1110
1111 (defun newsticker-previous-feed-available-p ()
1112   "Return t if position is behind first feed, nil otherwise."
1113   (save-excursion
1114     (let ((p (point)))
1115       (newsticker--buffer-goto '(feed) nil t)
1116       (not (= p (point))))))
1117
1118 (defun newsticker-next-item-available-p ()
1119   "Return t if position is before last feed, nil otherwise."
1120   (save-excursion
1121     (catch 'result
1122       (while (< (point) (point-max))
1123         (unless (newsticker--buffer-goto '(item))
1124           (throw 'result nil))
1125         (unless (newsticker--lists-intersect-p
1126                  (get-text-property (point) 'invisible)
1127                  buffer-invisibility-spec)
1128           (throw 'result t))))))
1129
1130 (defun newsticker-previous-item-available-p ()
1131   "Return t if position is behind first item, nil otherwise."
1132   (save-excursion
1133     (catch 'result
1134       (while (> (point) (point-min))
1135         (unless (newsticker--buffer-goto '(item) nil t)
1136           (throw 'result nil))
1137         (unless (newsticker--lists-intersect-p
1138                  (get-text-property (point) 'invisible)
1139                  buffer-invisibility-spec)
1140           (throw 'result t))))))
1141
1142 (defun newsticker-item-not-old-p ()
1143   "Return t if there is an item at point which is not old, nil otherwise."
1144     (when (get-text-property (point) 'feed)
1145       (save-excursion
1146         (newsticker--buffer-beginning-of-item)
1147         (let ((age (get-text-property (point) 'nt-age)))
1148           (and (memq  age '(new immortal obsolete)) t)))))
1149
1150 (defun newsticker-item-not-immortal-p ()
1151   "Return t if there is an item at point which is not immortal, nil otherwise."
1152     (when (get-text-property (point) 'feed)
1153       (save-excursion
1154         (newsticker--buffer-beginning-of-item)
1155         (let ((age (get-text-property (point) 'nt-age)))
1156           (and (memq  age '(new old obsolete)) t)))))
1157
1158 ;; ======================================================================
1159 ;;; Imenu stuff
1160 ;; ======================================================================
1161 (defun newsticker--imenu-create-index ()
1162   "Scan newsticker buffer and return an index for imenu."
1163   (save-excursion
1164     (goto-char (point-min))
1165     (let ((index-alist nil)
1166           (feed-list nil)
1167           (go-ahead t))
1168       (while go-ahead
1169         (let ((type  (get-text-property (point) 'nt-type))
1170               (title (get-text-property (point) 'nt-title)))
1171           (cond ((eq type 'feed)
1172                  ;; we're on a feed heading
1173                  (when feed-list
1174                    (if index-alist
1175                        (nconc index-alist (list feed-list))
1176                      (setq index-alist (list feed-list))))
1177                  (setq feed-list (list title)))
1178                 (t
1179                  (nconc feed-list
1180                         (list (cons title (point)))))))
1181         (setq go-ahead (newsticker--buffer-goto '(item feed))))
1182       (if index-alist
1183           (nconc index-alist (list feed-list))
1184         (setq index-alist (list feed-list)))
1185       index-alist)))
1186
1187 (defun newsticker--imenu-goto (name pos &rest args)
1188   "Go to item NAME at position POS and show item.
1189 ARGS are ignored."
1190   (goto-char pos)
1191   ;; show headline
1192   (newsticker--buffer-goto '(desc extra feed item))
1193   (let* ((inhibit-read-only t)
1194          (pos1 (max (point-min) (1- pos)))
1195          (pos2 (max pos1 (1- (point))))
1196          (inv-prop (get-text-property pos 'invisible))
1197          (org-inv-prop (get-text-property pos 'org-invisible)))
1198     (when (eq org-inv-prop nil)
1199       (add-text-properties pos1 pos2 (list 'invisible nil
1200                                           'org-invisible inv-prop))))
1201   ;; show desc
1202   (newsticker-show-entry))
1203
1204 ;; ======================================================================
1205 ;;; Buffer stuff
1206 ;; ======================================================================
1207 (defun newsticker--buffer-set-uptodate (value)
1208   "Set the uptodate-status of the newsticker buffer to VALUE.
1209 The mode-line is changed accordingly."
1210   (setq newsticker--buffer-uptodate-p value)
1211   (let ((b (get-buffer "*newsticker*")))
1212     (when b
1213       (save-excursion
1214        (set-buffer b)
1215        (if value
1216            (setq mode-name "Newsticker -- up to date -- ")
1217          (setq mode-name "Newsticker -- NEED UPDATE -- ")))
1218       (force-mode-line-update 0))))
1219
1220 (defun newsticker--buffer-redraw ()
1221   "Redraw the newsticker window."
1222   (if (fboundp 'force-window-update)
1223       (force-window-update (current-buffer))
1224     (redraw-frame (selected-frame)))
1225   (run-hooks 'newsticker-buffer-change-hook)
1226   (sit-for 0))
1227
1228 (defun newsticker--buffer-insert-all-items ()
1229   "Insert all cached newsticker items into the current buffer.
1230 Keeps order of feeds as given in `newsticker-url-list' and
1231 `newsticker-url-list-defaults'."
1232   (goto-char (point-min))
1233   (mapc (lambda (url-item)
1234           (let* ((feed-name (car url-item))
1235                  (feed-name-symbol (intern feed-name))
1236                  (feed (assoc feed-name-symbol newsticker--cache))
1237                  (items (cdr feed))
1238                  (pos (point)))
1239             (when feed
1240               ;; insert the feed description
1241               (mapc (lambda (item)
1242                       (when (eq (newsticker--age item) 'feed)
1243                         (newsticker--buffer-insert-item item
1244                                                         feed-name-symbol)))
1245                     items)
1246               ;;insert the items
1247               (mapc (lambda (item)
1248                       (if (memq (newsticker--age item) '(new immortal old
1249                                                              obsolete))
1250                           (newsticker--buffer-insert-item item
1251                                                           feed-name-symbol)))
1252                     items)
1253               (put-text-property pos (point) 'feed (car feed))
1254
1255               ;; insert empty line between feeds
1256               (let ((p (point)))
1257                 (insert "\n")
1258                 (put-text-property p (point) 'hard t)))))
1259         (append newsticker-url-list newsticker-url-list-defaults))
1260
1261   (newsticker--buffer-set-faces (point-min) (point-max))
1262   (newsticker--buffer-set-invisibility (point-min) (point-max))
1263   (goto-char (point-min)))
1264
1265 (defun newsticker--buffer-insert-item (item &optional feed-name-symbol)
1266   "Insert a news item in the current buffer.
1267 Insert a formatted representation of the ITEM.  The optional parameter
1268 FEED-NAME-SYMBOL determines how the item is formatted and whether the
1269 item-retrieval time is added as well."
1270   ;; insert headline
1271   (if (eq (newsticker--age item) 'feed)
1272       (newsticker--buffer-do-insert-text item 'feed feed-name-symbol)
1273     (newsticker--buffer-do-insert-text item 'item feed-name-symbol))
1274   ;; insert the description
1275   (newsticker--buffer-do-insert-text item 'desc feed-name-symbol))
1276
1277 (defun newsticker--buffer-do-insert-text (item type feed-name-symbol)
1278   "Actually insert contents of news item, format it, render it and all that.
1279 ITEM is a news item, TYPE tells which part of the item shall be inserted,
1280 FEED-NAME-SYMBOL tells to which feed this item belongs."
1281   (let* ((pos (point))
1282          (format newsticker-desc-format)
1283          (pos-date-start nil)
1284          (pos-date-end nil)
1285          (pos-stat-start nil)
1286          (pos-stat-end nil)
1287          (pos-text-start nil)
1288          (pos-text-end nil)
1289          (pos-extra-start nil)
1290          (pos-extra-end nil)
1291          (pos-enclosure-start nil)
1292          (pos-enclosure-end nil)
1293          (age (newsticker--age item))
1294          (preformatted-contents (newsticker--preformatted-contents item))
1295          (preformatted-title (newsticker--preformatted-title item)))
1296     (cond ((and preformatted-contents
1297                 (not (eq (aref preformatted-contents 0) ?\n));; we must
1298                                                        ;; NOT have a line
1299                                                        ;; break!
1300                 (eq type 'desc))
1301            (insert preformatted-contents))
1302           ((and preformatted-title
1303                 (not (eq (aref preformatted-title 0) ?\n));; we must NOT have a
1304                                                     ;; line break!
1305                 (eq type 'item))
1306            (insert preformatted-title))
1307           (t
1308            ;; item was not formatted before.
1309            ;; Let's go.
1310            (if (eq type 'item)
1311                (setq format newsticker-item-format)
1312              (if (eq type 'feed)
1313                  (setq format newsticker-heading-format)))
1314
1315            (while (> (length format) 0)
1316              (let ((prefix (if (> (length format) 1)
1317                                (substring format 0 2)
1318                              "")))
1319                (cond ((string= "%c" prefix)
1320                       ;; contents
1321                       (when (newsticker--desc item)
1322                         (setq pos-text-start (point-marker))
1323                         (insert (newsticker--desc item))
1324                         (setq pos-text-end (point-marker)))
1325                       (setq format (substring format 2)))
1326                      ((string= "%d" prefix)
1327                       ;; date
1328                       (setq pos-date-start (point-marker))
1329                       (if (newsticker--time item)
1330                           (insert (format-time-string newsticker-date-format
1331                                                       (newsticker--time item))))
1332                       (setq pos-date-end (point-marker))
1333                       (setq format (substring format 2)))
1334                      ((string= "%l" prefix)
1335                       ;; logo
1336                       (let ((disabled (cond ((eq (newsticker--age item) 'feed)
1337                                              (= (newsticker--stat-num-items
1338                                                  feed-name-symbol 'new) 0))
1339                                             (t
1340                                              (not (eq (newsticker--age item)
1341                                                       'new))))))
1342                         (let ((img (newsticker--image-read feed-name-symbol
1343                                                            disabled)))
1344                           (when img
1345                             (newsticker--insert-image img (car item)))))
1346                       (setq format (substring format 2)))
1347                      ((string= "%L" prefix)
1348                       ;; logo or title
1349                       (let ((disabled (cond ((eq (newsticker--age item) 'feed)
1350                                              (= (newsticker--stat-num-items
1351                                                  feed-name-symbol 'new) 0))
1352                                             (t
1353                                              (not (eq (newsticker--age item)
1354                                                       'new))))))
1355                         (let ((img (newsticker--image-read feed-name-symbol
1356                                                            disabled)))
1357                           (if img
1358                               (newsticker--insert-image img (car item))
1359                             (when (car item)
1360                               (setq pos-text-start (point-marker))
1361                               (if (eq (newsticker--age item) 'feed)
1362                                   (insert (newsticker--title item))
1363                                 ;; FIXME: This is not the "real" title!
1364                                 (insert (format "%s"
1365                                                 (car (newsticker--cache-get-feed
1366                                                       feed-name-symbol)))))
1367                               (setq pos-text-end (point-marker))))))
1368                       (setq format (substring format 2)))
1369                      ((string= "%s" prefix)
1370                       ;; statistics
1371                       (setq pos-stat-start (point-marker))
1372                       (if (eq (newsticker--age item) 'feed)
1373                           (insert (newsticker--buffer-statistics
1374                                    feed-name-symbol)))
1375                       (setq pos-stat-end (point-marker))
1376                       (setq format (substring format 2)))
1377                      ((string= "%t" prefix)
1378                       ;; title
1379                       (when (car item)
1380                         (setq pos-text-start (point-marker))
1381                         (insert (car item))
1382                         (setq pos-text-end (point-marker)))
1383                       (setq format (substring format 2)))
1384                      ((string-match "%." prefix)
1385                       ;; unknown specifier!
1386                       (insert prefix)
1387                       (setq format (substring format 2)))
1388                      ((string-match "^\\([^%]*\\)\\(.*\\)" format) ;; FIXME!
1389                       ;; everything else
1390                       (let ((p (point)))
1391                         (insert (substring format
1392                                            (match-beginning 1) (match-end 1)))
1393                         ;; in case that the format string contained newlines
1394                         (put-text-property p (point) 'hard t))
1395                       (setq format (substring format (match-beginning 2)))))))
1396
1397            ;; decode HTML if possible...
1398            (let ((is-rendered-HTML nil))
1399              (when (and newsticker-html-renderer pos-text-start pos-text-end)
1400                (condition-case error-data
1401                    (save-excursion
1402                      ;; check whether it is necessary to call html renderer
1403                      ;; (regexp inspired by htmlr.el)
1404                      (goto-char pos-text-start)
1405                      (when (re-search-forward
1406                             "</?[A-Za-z1-6]*\\|&#?[A-Za-z0-9]+;" pos-text-end t)
1407                        ;; (message "%s" (newsticker--title item))
1408                        (let ((w3m-fill-column (if newsticker-use-full-width
1409                                                   -1 fill-column))
1410                              (w3-maximum-line-length
1411                               (if newsticker-use-full-width nil fill-column)))
1412                          (save-excursion
1413                            (funcall newsticker-html-renderer pos-text-start
1414                                     pos-text-end)))
1415                        (cond ((eq newsticker-html-renderer 'w3m-region)
1416                               (add-text-properties pos (point-max)
1417                                                    (list 'keymap
1418                                                          w3m-minor-mode-map)))
1419                              ((eq newsticker-html-renderer 'w3-region)
1420                               (add-text-properties pos (point-max)
1421                                                    (list 'keymap w3-mode-map))))
1422                        (setq is-rendered-HTML t)))
1423                  (error
1424                   (message "Error: HTML rendering failed: %s, %s"
1425                            (car error-data) (cdr error-data)))))
1426              ;; After html rendering there might be chunks of blank
1427              ;; characters between rendered text and date, statistics or
1428              ;; whatever.  Remove it
1429              (when (and (eq type 'item) is-rendered-HTML)
1430                (goto-char pos)
1431                (while (re-search-forward "[ \t]*\n[ \t]*" nil t)
1432                  (replace-match " " nil nil))
1433                (goto-char (point-max)))
1434              (when (and newsticker-justification
1435                         (memq type '(item desc))
1436                         (not is-rendered-HTML))
1437                (condition-case nil
1438                    (let ((use-hard-newlines t))
1439                      (fill-region pos (point-max) newsticker-justification))
1440                  (error nil))))
1441
1442            ;; remove leading and trailing newlines
1443            (goto-char pos)
1444            (unless (= 0 (skip-chars-forward " \t\r\n"))
1445              (delete-region pos (point)))
1446            (goto-char (point-max))
1447            (let ((end (point)))
1448              (unless (= 0 (skip-chars-backward " \t\r\n" (1+ pos)))
1449                (delete-region (point) end)))
1450            (goto-char (point-max))
1451            ;; closing newline
1452            (unless nil ;;(eq pos (point))
1453              (insert "\n")
1454              (put-text-property (1- (point)) (point) 'hard t))
1455
1456            ;; insert enclosure element
1457            (when (eq type 'desc)
1458              (setq pos-enclosure-start (point))
1459              (newsticker--insert-enclosure item newsticker--url-keymap)
1460              (setq pos-enclosure-end (point)))
1461
1462            ;; show extra elements
1463            (when (eq type 'desc)
1464              (goto-char (point-max))
1465              (setq pos-extra-start (point))
1466              (newsticker--print-extra-elements item newsticker--url-keymap)
1467              (setq pos-extra-end (point)))
1468
1469            ;; text properties
1470            (when (memq type '(feed item))
1471              (add-text-properties pos (1- (point))
1472                                   (list 'mouse-face 'highlight
1473                                         'nt-link (newsticker--link item)
1474                                         'help-echo
1475                                         (format "mouse-2: visit item (%s)"
1476                                                 (newsticker--link item))
1477                                         'keymap newsticker--url-keymap))
1478              (add-text-properties pos (point)
1479                                   (list 'nt-title (newsticker--title item)
1480                                         'nt-desc (newsticker--desc item))))
1481
1482            (add-text-properties pos (point)
1483                                 (list 'nt-type type
1484                                       'nt-face type
1485                                       'nt-age  age
1486                                       'nt-guid (newsticker--guid item)))
1487            (when (and pos-date-start pos-date-end)
1488              (put-text-property pos-date-start pos-date-end 'nt-face 'date))
1489            (when (and pos-stat-start pos-stat-end)
1490              (put-text-property pos-stat-start pos-stat-end 'nt-face 'stat))
1491            (when (and pos-extra-start pos-extra-end)
1492              (put-text-property pos-extra-start pos-extra-end
1493                                 'nt-face 'extra)
1494              (put-text-property pos-extra-start pos-extra-end
1495                                 'nt-type 'extra))
1496            (when (and pos-enclosure-start pos-enclosure-end
1497                       (> pos-enclosure-end pos-enclosure-start))
1498              (put-text-property pos-enclosure-start (1- pos-enclosure-end)
1499                                 'nt-face 'enclosure))
1500
1501            ;; left margin
1502            ;;(unless (memq type '(feed item))
1503            ;;(set-left-margin pos (1- (point)) 1))
1504
1505            ;; save rendered stuff
1506            (cond ((eq type 'desc)
1507                   ;; preformatted contents
1508                   (newsticker--cache-set-preformatted-contents
1509                    item (buffer-substring pos (point))))
1510                   ((eq type 'item)
1511                    ;; preformatted title
1512                    (newsticker--cache-set-preformatted-title
1513                     item (buffer-substring pos (point)))))))))
1514
1515 (defun newsticker--buffer-statistics (feed-name-symbol)
1516   "Return a statistic string for the feed given by FEED-NAME-SYMBOL.
1517 See `newsticker-statistics-format'."
1518   (let ((case-fold-search nil))
1519     (replace-regexp-in-string
1520      "%a"
1521      (format "%d" (newsticker--stat-num-items feed-name-symbol))
1522      (replace-regexp-in-string
1523       "%i"
1524       (format "%d" (newsticker--stat-num-items feed-name-symbol 'immortal))
1525       (replace-regexp-in-string
1526        "%n"
1527        (format "%d" (newsticker--stat-num-items feed-name-symbol 'new))
1528        (replace-regexp-in-string
1529         "%o"
1530         (format "%d" (newsticker--stat-num-items feed-name-symbol 'old))
1531         (replace-regexp-in-string
1532          "%O"
1533          (format "%d" (newsticker--stat-num-items feed-name-symbol 'obsolete))
1534          newsticker-statistics-format)))))))
1535
1536 (defun newsticker--buffer-set-faces (start end)
1537   "Add face properties according to mark property.
1538 Scans the buffer between START and END."
1539   (save-excursion
1540     (put-text-property start end 'face 'newsticker-default-face)
1541     (goto-char start)
1542     (let ((pos1 start)
1543           (pos2 1)
1544           (nt-face (get-text-property start 'nt-face))
1545           (nt-age (get-text-property start 'nt-age)))
1546       (when nt-face
1547         (setq pos2 (next-single-property-change (point) 'nt-face))
1548         (newsticker--set-face-properties pos1 pos2 nt-face nt-age)
1549         (setq nt-face (get-text-property pos2 'nt-face))
1550         (setq pos1 pos2))
1551       (while (and (setq pos2 (next-single-property-change pos1 'nt-face))
1552                   (<= pos2 end)
1553                   (> pos2 pos1))
1554         (newsticker--set-face-properties pos1 pos2 nt-face nt-age)
1555         (setq nt-face (get-text-property pos2 'nt-face))
1556         (setq nt-age (get-text-property pos2 'nt-age))
1557         (setq pos1 pos2)))))
1558
1559 (defun newsticker--buffer-set-invisibility (start end)
1560   "Add invisibility properties according to nt-type property.
1561 Scans the buffer between START and END.  Sets the 'invisible
1562 property to '(<nt-type>-<nt-age> <nt-type> <nt-age>)."
1563   (save-excursion
1564     ;; reset invisibility settings
1565     (put-text-property start end 'invisible nil)
1566     ;; let's go
1567     (goto-char start)
1568     (let ((pos1 start)
1569           (pos2 1)
1570           (nt-type (get-text-property start 'nt-type))
1571           (nt-age (get-text-property start 'nt-age)))
1572       (when nt-type
1573         (setq pos2 (next-single-property-change (point) 'nt-type))
1574         (put-text-property (max (point-min) pos1) (1- pos2)
1575                            'invisible
1576                            (list (intern
1577                                   (concat
1578                                    (symbol-name
1579                                     (if (eq nt-type 'extra) 'desc nt-type))
1580                                    "-"
1581                                    (symbol-name nt-age)))
1582                                  nt-type
1583                                  nt-age))
1584         (setq nt-type (get-text-property pos2 'nt-type))
1585         (setq pos1 pos2))
1586       (while (and (setq pos2 (next-single-property-change pos1 'nt-type))
1587                   (<= pos2 end)
1588                   (> pos2 pos1))
1589         ;; must shift one char to the left in order to handle inivisible
1590         ;; newlines, motion in invisible text areas and all that correctly
1591         (put-text-property (1- pos1) (1- pos2)
1592                            'invisible
1593                            (list (intern
1594                                   (concat
1595                                    (symbol-name
1596                                     (if (eq nt-type 'extra) 'desc nt-type))
1597                                    "-"
1598                                    (symbol-name nt-age)))
1599                                  nt-type
1600                                  nt-age))
1601         (setq nt-type (get-text-property pos2 'nt-type))
1602         (setq nt-age (get-text-property pos2 'nt-age))
1603         (setq pos1 pos2)))))
1604
1605 (defun newsticker--set-face-properties (pos1 pos2 nt-face age)
1606   "Set the face for the text between the positions POS1 and POS2.
1607 The face is chosen according the values of NT-FACE and AGE."
1608   (let ((face (cond ((eq nt-face 'feed)
1609                      'newsticker-feed-face)
1610                     ((eq nt-face 'item)
1611                      (cond ((eq age 'new)
1612                             'newsticker-new-item-face)
1613                            ((eq age 'old)
1614                             'newsticker-old-item-face)
1615                            ((eq age 'immortal)
1616                             'newsticker-immortal-item-face)
1617                            ((eq age 'obsolete)
1618                             'newsticker-obsolete-item-face)))
1619                     ((eq nt-face 'date)
1620                      'newsticker-date-face)
1621                     ((eq nt-face 'stat)
1622                      'newsticker-statistics-face)
1623                     ((eq nt-face 'extra)
1624                      'newsticker-extra-face)
1625                     ((eq nt-face 'enclosure)
1626                      'newsticker-enclosure-face))))
1627     (when face
1628       (put-text-property pos1 (max pos1 pos2) 'face face))))
1629
1630 ;; ======================================================================
1631 ;;; Functions working on the *newsticker* buffer
1632 ;; ======================================================================
1633 (defun newsticker--buffer-make-item-completely-visible ()
1634   "Scroll buffer until current item is completely visible."
1635   (when newsticker--auto-narrow-to-feed
1636     (let* ((min (or (save-excursion (newsticker--buffer-beginning-of-feed))
1637                     (point-min)))
1638            (max (or (save-excursion (newsticker--buffer-end-of-feed))
1639                     (point-max))))
1640       (narrow-to-region min max)))
1641   (when newsticker--auto-narrow-to-item
1642     (let* ((min (or (save-excursion (newsticker--buffer-beginning-of-item))
1643                     (point-min)))
1644            (max (or (save-excursion (newsticker--buffer-end-of-item))
1645                     (point-max))))
1646       (narrow-to-region min max)))
1647   (sit-for 0)
1648   ;; do not count lines and stuff because that does not work when images
1649   ;; are displayed. Do it the simple way:
1650   (save-excursion
1651     (newsticker--buffer-end-of-item)
1652     (unless (pos-visible-in-window-p)
1653       (recenter -1)))
1654   (unless (pos-visible-in-window-p)
1655     (recenter 0)))
1656
1657 (defun newsticker--buffer-get-feed-title-at-point ()
1658   "Return feed symbol of headline at point."
1659   (format "%s" (or (get-text-property (point) 'feed) " ")))
1660
1661 (defun newsticker--buffer-get-item-title-at-point ()
1662   "Return feed symbol of headline at point."
1663   (format "%s" (or (get-text-property (point) 'nt-title) " ")))
1664
1665 (defun newsticker--buffer-goto (types &optional age backwards)
1666   "Search next occurrence of TYPES in current buffer.
1667 TYPES is a list of symbols.  If TYPES is found point is moved, if
1668 not point is left unchanged.  If optional parameter AGE is not
1669 nil, the type AND the age must match.  If BACKWARDS is t, search
1670 backwards."
1671   (let ((pos (save-excursion
1672                (save-restriction
1673                  (widen)
1674                  (catch 'found
1675                    (let ((tpos (point)))
1676                      (while (setq tpos
1677                                   (if backwards
1678                                       (if (eq tpos (point-min))
1679                                           nil
1680                                         (or (previous-single-property-change
1681                                              tpos 'nt-type)
1682                                             (point-min)))
1683                                     (next-single-property-change
1684                                      tpos 'nt-type)))
1685                        (and (memq (get-text-property tpos 'nt-type) types)
1686                             (or (not age)
1687                                 (eq (get-text-property tpos 'nt-age) age))
1688                             (throw 'found tpos)))))))))
1689     (when pos
1690       (goto-char pos))
1691     pos))
1692
1693 (defun newsticker--buffer-hideshow (mark-age onoff)
1694   "Hide or show items of type MARK-AGE.
1695 If ONOFF is nil the item is hidden, otherwise it is shown."
1696   (if onoff
1697       (remove-from-invisibility-spec mark-age)
1698     (add-to-invisibility-spec mark-age)))
1699
1700 (defun newsticker--buffer-beginning-of-item ()
1701   "Move point to the beginning of the item at point.
1702 Return new position."
1703   (if (bobp)
1704       (point)
1705     (let ((type (get-text-property (point) 'nt-type))
1706           (typebefore (get-text-property (1- (point)) 'nt-type)))
1707       (if (and (memq type '(item feed))
1708                    (not (eq type typebefore)))
1709           (point)
1710         (newsticker--buffer-goto '(item feed) nil t)
1711         (point)))))
1712
1713 (defun newsticker--buffer-beginning-of-feed ()
1714   "Move point to the beginning of the feed at point.
1715 Return new position."
1716   (if (bobp)
1717       (point)
1718     (let ((type (get-text-property (point) 'nt-type))
1719           (typebefore (get-text-property (1- (point)) 'nt-type)))
1720       (if (and (memq type '(feed))
1721                    (not (eq type typebefore)))
1722           (point)
1723         (newsticker--buffer-goto '(feed) nil t)
1724         (point)))))
1725
1726 (defun newsticker--buffer-end-of-item ()
1727   "Move point to the end of the item at point.
1728 Take care: end of item is at the end of its last line!"
1729   (when (newsticker--buffer-goto '(item feed nil))
1730     (point)))
1731
1732 (defun newsticker--buffer-end-of-feed ()
1733   "Move point to the end of the last item of the feed at point.
1734 Take care: end of item is at the end of its last line!"
1735   (when (newsticker--buffer-goto '(feed nil))
1736     (backward-char 1)
1737     (point)))
1738
1739 ;; ======================================================================
1740 ;;; misc
1741 ;; ======================================================================
1742
1743 (defun newsticker-mouse-browse-url (event)
1744   "Call `browse-url' for the link of the item at which the EVENT occurred."
1745   (interactive "e")
1746   (save-excursion
1747     (switch-to-buffer (window-buffer (posn-window (event-end event))))
1748     (let ((url (get-text-property (posn-point (event-end event))
1749                                   'nt-link)))
1750       (when url
1751         (browse-url url)
1752         (save-excursion
1753           (goto-char (posn-point (event-end event)))
1754           (if newsticker-automatically-mark-visited-items-as-old
1755               (newsticker-mark-item-at-point-as-read t)))))))
1756
1757 (defun newsticker-browse-url ()
1758   "Call `browse-url' for the link of the item at point."
1759   (interactive)
1760   (let ((url (get-text-property (point) 'nt-link)))
1761     (when url
1762       (browse-url url)
1763       (if newsticker-automatically-mark-visited-items-as-old
1764           (newsticker-mark-item-at-point-as-read t)))))
1765
1766 (defvar newsticker-open-url-history
1767   '("wget" "xmms" "realplay")
1768   "...")
1769
1770 (defun newsticker-handle-url ()
1771   "Ask for a program to open the link of the item at point."
1772   (interactive)
1773   (let ((url (get-text-property (point) 'nt-link)))
1774     (when url
1775       (let ((prog (read-string "Open url with: " nil
1776                                'newsticker-open-url-history)))
1777         (when prog
1778           (message "%s %s" prog url)
1779           (start-process prog prog prog url)
1780       (if newsticker-automatically-mark-visited-items-as-old
1781           (newsticker-mark-item-at-point-as-read t)))))))
1782
1783
1784 ;; ======================================================================
1785 ;;; Misc
1786 ;; ======================================================================
1787
1788 (defun newsticker--cache-sort ()
1789   "Sort the newsticker cache data."
1790   (let ((sort-fun (cond ((eq newsticker-sort-method 'sort-by-time)
1791                          'newsticker--cache-item-compare-by-time)
1792                         ((eq newsticker-sort-method 'sort-by-title)
1793                          'newsticker--cache-item-compare-by-title)
1794                         ((eq newsticker-sort-method 'sort-by-original-order)
1795                          'newsticker--cache-item-compare-by-position))))
1796     (mapc (lambda (feed-list)
1797             (setcdr feed-list (sort (cdr feed-list)
1798                                     sort-fun)))
1799           newsticker--cache)))
1800
1801 (provide 'newsticker-plainview)
1802
1803 ;; arch-tag: 4e48b683-d48b-48dd-a13e-fe45baf41184
1804 ;;; newst-plainview.el ends here