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Revision: 1.9
Committed: Tue Jan 3 21:15:22 2006 UTC (18 years, 6 months ago) by root
Branch: MAIN
Changes since 1.8: +95 -12 lines
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# Content
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129 .\" ========================================================================
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131 .IX Title "rxvt 3"
132 .TH rxvt 3 "2006-01-03" "6.2" "RXVT-UNICODE"
133 .SH "NAME"
134 @@RXVT_NAME@@perl \- rxvt\-unicode's embedded perl interpreter
135 .SH "SYNOPSIS"
136 .IX Header "SYNOPSIS"
137 .Vb 1
138 \& # create a file grab_test in $HOME:
139 .Ve
140 .PP
141 .Vb 4
142 \& sub on_sel_grab {
143 \& warn "you selected ", $_[0]->selection;
144 \& ()
145 \& }
146 .Ve
147 .PP
148 .Vb 1
149 \& # start a @@RXVT_NAME@@ using it:
150 .Ve
151 .PP
152 .Vb 1
153 \& @@RXVT_NAME@@ --perl-lib $HOME -pe grab_test
154 .Ve
155 .SH "DESCRIPTION"
156 .IX Header "DESCRIPTION"
157 Everytime a terminal object gets created, scripts specified via the
158 \&\f(CW\*(C`perl\*(C'\fR resource are loaded and associated with it.
159 .PP
160 Scripts are compiled in a 'use strict' and 'use utf8' environment, and
161 thus must be encoded as \s-1UTF\-8\s0.
162 .PP
163 Each script will only ever be loaded once, even in @@RXVT_NAME@@d, where
164 scripts will be shared (but not enabled) for all terminals.
165 .Sh "Prepackaged Extensions"
166 .IX Subsection "Prepackaged Extensions"
167 This section describes the extensiosn delivered with this version. You can
168 find them in \fI@@RXVT_LIBDIR@@/urxvt/perl/\fR.
169 .PP
170 You can activate them like this:
171 .PP
172 .Vb 1
173 \& @@RXVT_NAME@@ -pe <extensionname>
174 .Ve
175 .IP "selection" 4
176 .IX Item "selection"
177 Intelligent selection. This etxension tries to be more intelligent when the user
178 extends selections (double\-click).
179 .Sp
180 It also offers the following bindable event:
181 .RS 4
182 .IP "rot13" 4
183 .IX Item "rot13"
184 Rot\-13 the selection when activated. Used via keyboard trigger:
185 .Sp
186 .Vb 1
187 \& URxvt.keysym.C-M-r: perl:selection:rot13
188 .Ve
189 .RE
190 .RS 4
191 .RE
192 .IP "digital-clock" 4
193 .IX Item "digital-clock"
194 Displays a digital clock using the built-in overlay.
195 .IP "example-refresh-hooks" 4
196 .IX Item "example-refresh-hooks"
197 Displays a very simple digital clock in the upper right corner of the
198 window. Illustrates overwriting the refresh callbacks to create your own
199 overlays or changes.
200 .Sh "General \s-1API\s0 Considerations"
201 .IX Subsection "General API Considerations"
202 All objects (such as terminals, time watchers etc.) are typical
203 reference-to-hash objects. The hash can be used to store anything you
204 like. All members starting with an underscore (such as \f(CW\*(C`_ptr\*(C'\fR or
205 \&\f(CW\*(C`_hook\*(C'\fR) are reserved for internal uses and \fB\s-1MUST\s0 \s-1NOT\s0\fR be accessed or
206 modified).
207 .PP
208 When objects are destroyed on the \*(C+ side, the perl object hashes are
209 emptied, so its best to store related objects such as time watchers and
210 the like inside the terminal object so they get destroyed as soon as the
211 terminal is destroyed.
212 .Sh "Hooks"
213 .IX Subsection "Hooks"
214 The following subroutines can be declared in loaded scripts, and will be
215 called whenever the relevant event happens.
216 .PP
217 The first argument passed to them is an object private to each terminal
218 and extension package. You can call all \f(CW\*(C`urxvt::term\*(C'\fR methods on it, but
219 its not a real \f(CW\*(C`urxvt::term\*(C'\fR object. Instead, the real \f(CW\*(C`urxvt::term\*(C'\fR
220 object that is shared between all packages is stored in the \f(CW\*(C`term\*(C'\fR
221 member.
222 .PP
223 All of them must return a boolean value. If it is true, then the event
224 counts as being \fIconsumed\fR, and the invocation of other hooks is skipped,
225 and the relevant action might not be carried out by the \*(C+ code.
226 .PP
227 When in doubt, return a false value (preferably \f(CW\*(C`()\*(C'\fR).
228 .ie n .IP "on_init $term" 4
229 .el .IP "on_init \f(CW$term\fR" 4
230 .IX Item "on_init $term"
231 Called after a new terminal object has been initialized, but before
232 windows are created or the command gets run.
233 .ie n .IP "on_reset $term" 4
234 .el .IP "on_reset \f(CW$term\fR" 4
235 .IX Item "on_reset $term"
236 Called after the screen is \*(L"reset\*(R" for any reason, such as resizing or
237 control sequences. Here is where you can react on changes to size-related
238 variables.
239 .ie n .IP "on_start $term" 4
240 .el .IP "on_start \f(CW$term\fR" 4
241 .IX Item "on_start $term"
242 Called at the very end of initialisation of a new terminal, just before
243 returning to the mainloop.
244 .ie n .IP "on_sel_make $term\fR, \f(CW$eventtime" 4
245 .el .IP "on_sel_make \f(CW$term\fR, \f(CW$eventtime\fR" 4
246 .IX Item "on_sel_make $term, $eventtime"
247 Called whenever a selection has been made by the user, but before the
248 selection text is copied, so changes to the beginning, end or type of the
249 selection will be honored.
250 .Sp
251 Returning a true value aborts selection making by urxvt, in which case you
252 have to make a selection yourself by calling \f(CW\*(C`$term\->selection_grab\*(C'\fR.
253 .ie n .IP "on_sel_grab $term\fR, \f(CW$eventtime" 4
254 .el .IP "on_sel_grab \f(CW$term\fR, \f(CW$eventtime\fR" 4
255 .IX Item "on_sel_grab $term, $eventtime"
256 Called whenever a selection has been copied, but before the selection is
257 requested from the server. The selection text can be queried and changed
258 by calling \f(CW\*(C`$term\->selection\*(C'\fR.
259 .Sp
260 Returning a true value aborts selection grabbing. It will still be hilighted.
261 .ie n .IP "on_sel_extend $term" 4
262 .el .IP "on_sel_extend \f(CW$term\fR" 4
263 .IX Item "on_sel_extend $term"
264 Called whenever the user tries to extend the selection (e.g. with a double
265 click) and is either supposed to return false (normal operation), or
266 should extend the selection itelf and return true to suppress the built-in
267 processing.
268 .Sp
269 See the \fIselection\fR example extension.
270 .ie n .IP "on_focus_in $term" 4
271 .el .IP "on_focus_in \f(CW$term\fR" 4
272 .IX Item "on_focus_in $term"
273 Called whenever the window gets the keyboard focus, before urxvt does
274 focus in processing.
275 .ie n .IP "on_focus_out $term" 4
276 .el .IP "on_focus_out \f(CW$term\fR" 4
277 .IX Item "on_focus_out $term"
278 Called wheneever the window loses keyboard focus, before urxvt does focus
279 out processing.
280 .ie n .IP "on_view_change $term\fR, \f(CW$offset" 4
281 .el .IP "on_view_change \f(CW$term\fR, \f(CW$offset\fR" 4
282 .IX Item "on_view_change $term, $offset"
283 Called whenever the view offset changes, i..e the user or program
284 scrolls. Offset \f(CW0\fR means display the normal terminal, positive values
285 show this many lines of scrollback.
286 .ie n .IP "on_scroll_back $term\fR, \f(CW$lines\fR, \f(CW$saved" 4
287 .el .IP "on_scroll_back \f(CW$term\fR, \f(CW$lines\fR, \f(CW$saved\fR" 4
288 .IX Item "on_scroll_back $term, $lines, $saved"
289 Called whenever lines scroll out of the terminal area into the scrollback
290 buffer. \f(CW$lines\fR is the number of lines scrolled out and may be larger
291 than the scroll back buffer or the terminal.
292 .Sp
293 It is called before lines are scrolled out (so rows 0 .. min ($lines \- 1,
294 \&\f(CW$nrow\fR \- 1) represent the lines to be scrolled out). \f(CW$saved\fR is the total
295 number of lines that will be in the scrollback buffer.
296 .ie n .IP "on_tty_activity $term *NYI*" 4
297 .el .IP "on_tty_activity \f(CW$term\fR *NYI*" 4
298 .IX Item "on_tty_activity $term *NYI*"
299 Called whenever the program(s) running in the urxvt window send output.
300 .ie n .IP "on_refresh_begin $term" 4
301 .el .IP "on_refresh_begin \f(CW$term\fR" 4
302 .IX Item "on_refresh_begin $term"
303 Called just before the screen gets redrawn. Can be used for overlay
304 or similar effects by modify terminal contents in refresh_begin, and
305 restoring them in refresh_end. The built-in overlay and selection display
306 code is run after this hook, and takes precedence.
307 .ie n .IP "on_refresh_end $term" 4
308 .el .IP "on_refresh_end \f(CW$term\fR" 4
309 .IX Item "on_refresh_end $term"
310 Called just after the screen gets redrawn. See \f(CW\*(C`on_refresh_begin\*(C'\fR.
311 .ie n .IP "on_keyboard_command $term\fR, \f(CW$string" 4
312 .el .IP "on_keyboard_command \f(CW$term\fR, \f(CW$string\fR" 4
313 .IX Item "on_keyboard_command $term, $string"
314 Called whenever the user presses a key combination that has a
315 \&\f(CW\*(C`perl:string\*(C'\fR action bound to it (see description of the \fBkeysym\fR
316 resource in the @@RXVT_NAME@@(1) manpage).
317 .ie n .Sh "Variables in the ""urxvt"" Package"
318 .el .Sh "Variables in the \f(CWurxvt\fP Package"
319 .IX Subsection "Variables in the urxvt Package"
320 .IP "$urxvt::TERM" 4
321 .IX Item "$urxvt::TERM"
322 The current terminal. Whenever a callback/Hook is bein executed, this
323 variable stores the current \f(CW\*(C`urxvt::term\*(C'\fR object.
324 .ie n .Sh "Functions in the ""urxvt"" Package"
325 .el .Sh "Functions in the \f(CWurxvt\fP Package"
326 .IX Subsection "Functions in the urxvt Package"
327 .ie n .IP "urxvt::fatal $errormessage" 4
328 .el .IP "urxvt::fatal \f(CW$errormessage\fR" 4
329 .IX Item "urxvt::fatal $errormessage"
330 Fatally aborts execution with the given error message. Avoid at all
331 costs! The only time this is acceptable is when the terminal process
332 starts up.
333 .ie n .IP "urxvt::warn $string" 4
334 .el .IP "urxvt::warn \f(CW$string\fR" 4
335 .IX Item "urxvt::warn $string"
336 Calls \f(CW\*(C`rxvt_warn\*(C'\fR with the given string which should not include a
337 newline. The module also overwrites the \f(CW\*(C`warn\*(C'\fR builtin with a function
338 that calls this function.
339 .Sp
340 Using this function has the advantage that its output ends up in the
341 correct place, e.g. on stderr of the connecting urxvtc client.
342 .IP "$time = urxvt::NOW" 4
343 .IX Item "$time = urxvt::NOW"
344 Returns the \*(L"current time\*(R" (as per the event loop).
345 .Sh "\s-1RENDITION\s0"
346 .IX Subsection "RENDITION"
347 Rendition bitsets contain information about colour, font, font styles and
348 similar information for each screen cell.
349 .PP
350 The following \*(L"macros\*(R" deal with changes in rendition sets. You should
351 never just create a bitset, you should always modify an existing one,
352 as they contain important information required for correct operation of
353 rxvt\-unicode.
354 .IP "$rend = urxvt::DEFAULT_RSTYLE" 4
355 .IX Item "$rend = urxvt::DEFAULT_RSTYLE"
356 Returns the default rendition, as used when the terminal is starting up or
357 being reset. Useful as a base to start when creating renditions.
358 .IP "$rend = urxvt::OVERLAY_RSTYLE" 4
359 .IX Item "$rend = urxvt::OVERLAY_RSTYLE"
360 Return the rendition mask used for overlays by default.
361 .IP "$rendbit = urxvt::RS_Bold, RS_Italic, RS_Blink, RS_RVid, RS_Uline" 4
362 .IX Item "$rendbit = urxvt::RS_Bold, RS_Italic, RS_Blink, RS_RVid, RS_Uline"
363 Return the bit that enabled bold, italic, blink, reverse-video and
364 underline, respectively. To enable such a style, just logically \s-1OR\s0 it into
365 the bitset.
366 .ie n .IP "$foreground = urxvt::GET_BASEFG $rend" 4
367 .el .IP "$foreground = urxvt::GET_BASEFG \f(CW$rend\fR" 4
368 .IX Item "$foreground = urxvt::GET_BASEFG $rend"
369 .PD 0
370 .ie n .IP "$background = urxvt::GET_BASEBG $rend" 4
371 .el .IP "$background = urxvt::GET_BASEBG \f(CW$rend\fR" 4
372 .IX Item "$background = urxvt::GET_BASEBG $rend"
373 .PD
374 Return the foreground/background colour index, respectively.
375 .ie n .IP "$rend = urxvt::SET_FGCOLOR ($rend, $new_colour)" 4
376 .el .IP "$rend = urxvt::SET_FGCOLOR ($rend, \f(CW$new_colour\fR)" 4
377 .IX Item "$rend = urxvt::SET_FGCOLOR ($rend, $new_colour)"
378 .PD 0
379 .ie n .IP "$rend = urxvt::SET_BGCOLOR ($rend, $new_colour)" 4
380 .el .IP "$rend = urxvt::SET_BGCOLOR ($rend, \f(CW$new_colour\fR)" 4
381 .IX Item "$rend = urxvt::SET_BGCOLOR ($rend, $new_colour)"
382 .PD
383 Replace the foreground/background colour in the rendition mask with the
384 specified one.
385 .IP "$value = urxvt::GET_CUSTOM ($rend)" 4
386 .IX Item "$value = urxvt::GET_CUSTOM ($rend)"
387 Return the \*(L"custom\*(R" value: Every rendition has 5 bits for use by
388 extensions. They can be set and changed as you like and are initially
389 zero.
390 .ie n .IP "$rend = urxvt::SET_CUSTOM ($rend, $new_value)" 4
391 .el .IP "$rend = urxvt::SET_CUSTOM ($rend, \f(CW$new_value\fR)" 4
392 .IX Item "$rend = urxvt::SET_CUSTOM ($rend, $new_value)"
393 Change the custom value.
394 .ie n .Sh "The ""urxvt::term"" Class"
395 .el .Sh "The \f(CWurxvt::term\fP Class"
396 .IX Subsection "The urxvt::term Class"
397 .ie n .IP "$value = $term\fR\->resource ($name[, \f(CW$newval])" 4
398 .el .IP "$value = \f(CW$term\fR\->resource ($name[, \f(CW$newval\fR])" 4
399 .IX Item "$value = $term->resource ($name[, $newval])"
400 Returns the current resource value associated with a given name and
401 optionally sets a new value. Setting values is most useful in the \f(CW\*(C`init\*(C'\fR
402 hook. Unset resources are returned and accepted as \f(CW\*(C`undef\*(C'\fR.
403 .Sp
404 The new value must be properly encoded to a suitable character encoding
405 before passing it to this method. Similarly, the returned value may need
406 to be converted from the used encoding to text.
407 .Sp
408 Resource names are as defined in \fIsrc/rsinc.h\fR. Colours can be specified
409 as resource names of the form \f(CW\*(C`color+<index>\*(C'\fR, e.g. \f(CW\*(C`color+5\*(C'\fR. (will
410 likely change).
411 .Sp
412 Please note that resource strings will currently only be freed when the
413 terminal is destroyed, so changing options frequently will eat memory.
414 .Sp
415 Here is a a likely non-exhaustive list of resource names, not all of which
416 are supported in every build, please see the source to see the actual
417 list:
418 .Sp
419 .Vb 12
420 \& answerbackstring backgroundPixmap backspace_key boldFont boldItalicFont
421 \& borderLess color cursorBlink cursorUnderline cutchars delete_key
422 \& display_name embed ext_bwidth fade font geometry hold iconName
423 \& imFont imLocale inputMethod insecure int_bwidth intensityStyles
424 \& italicFont jumpScroll lineSpace loginShell mapAlert menu meta8 modifier
425 \& mouseWheelScrollPage name pastableTabs path perl_eval perl_ext
426 \& perl_lib pointerBlank pointerBlankDelay preeditType print_pipe pty_fd
427 \& reverseVideo saveLines scrollBar scrollBar_align scrollBar_floating
428 \& scrollBar_right scrollBar_thickness scrollTtyKeypress scrollTtyOutput
429 \& scrollWithBuffer scrollstyle secondaryScreen secondaryScroll selectstyle
430 \& shade term_name title transparent transparent_all tripleclickwords
431 \& utmpInhibit visualBell
432 .Ve
433 .ie n .IP "($row, $col\fR) = \f(CW$term\fR\->selection_mark ([$row, \f(CW$col])" 4
434 .el .IP "($row, \f(CW$col\fR) = \f(CW$term\fR\->selection_mark ([$row, \f(CW$col\fR])" 4
435 .IX Item "($row, $col) = $term->selection_mark ([$row, $col])"
436 .PD 0
437 .ie n .IP "($row, $col\fR) = \f(CW$term\fR\->selection_beg ([$row, \f(CW$col])" 4
438 .el .IP "($row, \f(CW$col\fR) = \f(CW$term\fR\->selection_beg ([$row, \f(CW$col\fR])" 4
439 .IX Item "($row, $col) = $term->selection_beg ([$row, $col])"
440 .ie n .IP "($row, $col\fR) = \f(CW$term\fR\->selection_end ([$row, \f(CW$col])" 4
441 .el .IP "($row, \f(CW$col\fR) = \f(CW$term\fR\->selection_end ([$row, \f(CW$col\fR])" 4
442 .IX Item "($row, $col) = $term->selection_end ([$row, $col])"
443 .PD
444 Return the current values of the selection mark, begin or end positions,
445 and optionally set them to new values.
446 .ie n .IP "$success = $term\->selection_grab ($eventtime)" 4
447 .el .IP "$success = \f(CW$term\fR\->selection_grab ($eventtime)" 4
448 .IX Item "$success = $term->selection_grab ($eventtime)"
449 Try to request the primary selection from the server (for example, as set
450 by the next method).
451 .ie n .IP "$oldtext = $term\->selection ([$newtext])" 4
452 .el .IP "$oldtext = \f(CW$term\fR\->selection ([$newtext])" 4
453 .IX Item "$oldtext = $term->selection ([$newtext])"
454 Return the current selection text and optionally replace it by \f(CW$newtext\fR.
455 .Sp
456 #=item \f(CW$term\fR\->overlay ($x, \f(CW$y\fR, \f(CW$text\fR)
457 #
458 #Create a simple multi-line overlay box. See the next method for details.
459 #
460 #=cut
461 .Sp
462 sub urxvt::term::scr_overlay {
463 die;
464 my ($self, \f(CW$x\fR, \f(CW$y\fR, \f(CW$text\fR) = \f(CW@_\fR;
465 .Sp
466 .Vb 1
467 \& my @lines = split /\en/, $text;
468 .Ve
469 .Sp
470 .Vb 4
471 \& my $w = 0;
472 \& for (map $self->strwidth ($_), @lines) {
473 \& $w = $_ if $w < $_;
474 \& }
475 .Ve
476 .Sp
477 .Vb 3
478 \& $self->scr_overlay_new ($x, $y, $w, scalar @lines);
479 \& $self->scr_overlay_set (0, $_, $lines[$_]) for 0.. $#lines;
480 \&}
481 .Ve
482 .ie n .IP "$term\->overlay ($x, $y\fR, \f(CW$width\fR, \f(CW$height\fR[, \f(CW$rstyle\fR[, \f(CW$border]])" 4
483 .el .IP "$term\->overlay ($x, \f(CW$y\fR, \f(CW$width\fR, \f(CW$height\fR[, \f(CW$rstyle\fR[, \f(CW$border\fR]])" 4
484 .IX Item "$term->overlay ($x, $y, $width, $height[, $rstyle[, $border]])"
485 Create a new (empty) overlay at the given position with the given
486 width/height. \f(CW$rstyle\fR defines the initial rendition style
487 (default: \f(CW\*(C`OVERLAY_RSTYLE\*(C'\fR).
488 .Sp
489 If \f(CW$border\fR is \f(CW2\fR (default), then a decorative border will be put
490 around the box.
491 .Sp
492 If either \f(CW$x\fR or \f(CW$y\fR is negative, then this is counted from the
493 right/bottom side, respectively.
494 .Sp
495 This method returns an urxvt::overlay object. The overlay will be visible
496 as long as the perl object is referenced.
497 .Sp
498 The methods currently supported on \f(CW\*(C`urxvt::overlay\*(C'\fR objects are:
499 .RS 4
500 .ie n .IP "$overlay\->set ($x, $y\fR, \f(CW$text\fR, \f(CW$rend)" 4
501 .el .IP "$overlay\->set ($x, \f(CW$y\fR, \f(CW$text\fR, \f(CW$rend\fR)" 4
502 .IX Item "$overlay->set ($x, $y, $text, $rend)"
503 Similar to \f(CW\*(C`$term\->ROW_t\*(C'\fR and \f(CW\*(C`$term\->ROW_r\*(C'\fR in that it puts
504 text in rxvt\-unicode's special encoding and an array of rendition values
505 at a specific position inside the overlay.
506 .IP "$overlay\->hide" 4
507 .IX Item "$overlay->hide"
508 If visible, hide the overlay, but do not destroy it.
509 .IP "$overlay\->show" 4
510 .IX Item "$overlay->show"
511 If hidden, display the overlay again.
512 .RE
513 .RS 4
514 .RE
515 .ie n .IP "$cellwidth = $term\fR\->strwidth \f(CW$string" 4
516 .el .IP "$cellwidth = \f(CW$term\fR\->strwidth \f(CW$string\fR" 4
517 .IX Item "$cellwidth = $term->strwidth $string"
518 Returns the number of screen-cells this string would need. Correctly
519 accounts for wide and combining characters.
520 .ie n .IP "$octets = $term\fR\->locale_encode \f(CW$string" 4
521 .el .IP "$octets = \f(CW$term\fR\->locale_encode \f(CW$string\fR" 4
522 .IX Item "$octets = $term->locale_encode $string"
523 Convert the given text string into the corresponding locale encoding.
524 .ie n .IP "$string = $term\fR\->locale_decode \f(CW$octets" 4
525 .el .IP "$string = \f(CW$term\fR\->locale_decode \f(CW$octets\fR" 4
526 .IX Item "$string = $term->locale_decode $octets"
527 Convert the given locale-encoded octets into a perl string.
528 .IP "$term\->tt_write ($octets)" 4
529 .IX Item "$term->tt_write ($octets)"
530 Write the octets given in \f(CW$data\fR to the tty (i.e. as program input). To
531 pass characters instead of octets, you should convert your strings first
532 to the locale-specific encoding using \f(CW\*(C`$term\->locale_encode\*(C'\fR.
533 .ie n .IP "$nrow = $term\->nrow" 4
534 .el .IP "$nrow = \f(CW$term\fR\->nrow" 4
535 .IX Item "$nrow = $term->nrow"
536 .PD 0
537 .ie n .IP "$ncol = $term\->ncol" 4
538 .el .IP "$ncol = \f(CW$term\fR\->ncol" 4
539 .IX Item "$ncol = $term->ncol"
540 .PD
541 Return the number of rows/columns of the terminal window (i.e. as
542 specified by \f(CW\*(C`\-geometry\*(C'\fR, excluding any scrollback).
543 .ie n .IP "$nsaved = $term\->nsaved" 4
544 .el .IP "$nsaved = \f(CW$term\fR\->nsaved" 4
545 .IX Item "$nsaved = $term->nsaved"
546 Returns the number of lines in the scrollback buffer.
547 .ie n .IP "$view_start = $term\->view_start ([$newvalue])" 4
548 .el .IP "$view_start = \f(CW$term\fR\->view_start ([$newvalue])" 4
549 .IX Item "$view_start = $term->view_start ([$newvalue])"
550 Returns the negative row number of the topmost line. Minimum value is
551 \&\f(CW0\fR, which displays the normal terminal contents. Larger values scroll
552 this many lines into the scrollback buffer.
553 .IP "$term\->want_refresh" 4
554 .IX Item "$term->want_refresh"
555 Requests a screen refresh. At the next opportunity, rxvt-unicode will
556 compare the on-screen display with its stored representation. If they
557 differ, it redraws the differences.
558 .Sp
559 Used after changing terminal contents to display them.
560 .ie n .IP "$text = $term\fR\->ROW_t ($row_number[, \f(CW$new_text\fR[, \f(CW$start_col]])" 4
561 .el .IP "$text = \f(CW$term\fR\->ROW_t ($row_number[, \f(CW$new_text\fR[, \f(CW$start_col\fR]])" 4
562 .IX Item "$text = $term->ROW_t ($row_number[, $new_text[, $start_col]])"
563 Returns the text of the entire row with number \f(CW$row_number\fR. Row \f(CW0\fR
564 is the topmost terminal line, row \f(CW\*(C`$term\->$ncol\-1\*(C'\fR is the bottommost
565 terminal line. The scrollback buffer starts at line \f(CW\*(C`\-1\*(C'\fR and extends to
566 line \f(CW\*(C`\-$term\->nsaved\*(C'\fR. Nothing will be returned if a nonexistent line
567 is requested.
568 .Sp
569 If \f(CW$new_text\fR is specified, it will replace characters in the current
570 line, starting at column \f(CW$start_col\fR (default \f(CW0\fR), which is useful
571 to replace only parts of a line. The font index in the rendition will
572 automatically be updated.
573 .Sp
574 \&\f(CW$text\fR is in a special encoding: tabs and wide characters that use more
575 than one cell when displayed are padded with urxvt::NOCHAR characters
576 (\f(CW\*(C`chr 65535\*(C'\fR). Characters with combining characters and other characters
577 that do not fit into the normal tetx encoding will be replaced with
578 characters in the private use area.
579 .Sp
580 You have to obey this encoding when changing text. The advantage is
581 that \f(CW\*(C`substr\*(C'\fR and similar functions work on screen cells and not on
582 characters.
583 .Sp
584 The methods \f(CW\*(C`$term\->special_encode\*(C'\fR and \f(CW\*(C`$term\->special_decode\*(C'\fR
585 can be used to convert normal strings into this encoding and vice versa.
586 .ie n .IP "$rend = $term\fR\->ROW_r ($row_number[, \f(CW$new_rend\fR[, \f(CW$start_col]])" 4
587 .el .IP "$rend = \f(CW$term\fR\->ROW_r ($row_number[, \f(CW$new_rend\fR[, \f(CW$start_col\fR]])" 4
588 .IX Item "$rend = $term->ROW_r ($row_number[, $new_rend[, $start_col]])"
589 Like \f(CW\*(C`$term\->ROW_t\*(C'\fR, but returns an arrayref with rendition
590 bitsets. Rendition bitsets contain information about colour, font, font
591 styles and similar information. See also \f(CW\*(C`$term\->ROW_t\*(C'\fR.
592 .Sp
593 When setting rendition, the font mask will be ignored.
594 .Sp
595 See the section on \s-1RENDITION\s0, above.
596 .ie n .IP "$length = $term\fR\->ROW_l ($row_number[, \f(CW$new_length])" 4
597 .el .IP "$length = \f(CW$term\fR\->ROW_l ($row_number[, \f(CW$new_length\fR])" 4
598 .IX Item "$length = $term->ROW_l ($row_number[, $new_length])"
599 Returns the number of screen cells that are in use (\*(L"the line
600 length\*(R"). Unlike the urxvt core, this returns \f(CW\*(C`$term\->ncol\*(C'\fR if the
601 line is joined with the following one.
602 .ie n .IP "$bool = $term\->is_longer ($row_number)" 4
603 .el .IP "$bool = \f(CW$term\fR\->is_longer ($row_number)" 4
604 .IX Item "$bool = $term->is_longer ($row_number)"
605 Returns true if the row is part of a multiple-row logical \*(L"line\*(R" (i.e.
606 joined with the following row), which means all characters are in use
607 and it is continued on the next row (and possibly a continuation of the
608 previous row(s)).
609 .ie n .IP "$line = $term\->line ($row_number)" 4
610 .el .IP "$line = \f(CW$term\fR\->line ($row_number)" 4
611 .IX Item "$line = $term->line ($row_number)"
612 Create and return a new \f(CW\*(C`urxvt::line\*(C'\fR object that stores information
613 about the logical line that row \f(CW$row_number\fR is part of. It supports the
614 following methods:
615 .RS 4
616 .ie n .IP "$text = $line\->t" 4
617 .el .IP "$text = \f(CW$line\fR\->t" 4
618 .IX Item "$text = $line->t"
619 Returns the full text of the line, similar to \f(CW\*(C`ROW_t\*(C'\fR
620 .ie n .IP "$rend = $line\->r" 4
621 .el .IP "$rend = \f(CW$line\fR\->r" 4
622 .IX Item "$rend = $line->r"
623 Returns the full rendition array of the line, similar to \f(CW\*(C`ROW_r\*(C'\fR
624 .ie n .IP "$length = $line\->l" 4
625 .el .IP "$length = \f(CW$line\fR\->l" 4
626 .IX Item "$length = $line->l"
627 Returns the length of the line in cells, similar to \f(CW\*(C`ROW_l\*(C'\fR.
628 .ie n .IP "$rownum = $line\->beg" 4
629 .el .IP "$rownum = \f(CW$line\fR\->beg" 4
630 .IX Item "$rownum = $line->beg"
631 .PD 0
632 .ie n .IP "$rownum = $line\->end" 4
633 .el .IP "$rownum = \f(CW$line\fR\->end" 4
634 .IX Item "$rownum = $line->end"
635 .PD
636 Return the row number of the first/last row of the line, respectively.
637 .ie n .IP "$offset = $line\fR\->offset_of ($row, \f(CW$col)" 4
638 .el .IP "$offset = \f(CW$line\fR\->offset_of ($row, \f(CW$col\fR)" 4
639 .IX Item "$offset = $line->offset_of ($row, $col)"
640 Returns the character offset of the given row|col pair within the logical
641 line.
642 .ie n .IP "($row, $col\fR) = \f(CW$line\->coord_of ($offset)" 4
643 .el .IP "($row, \f(CW$col\fR) = \f(CW$line\fR\->coord_of ($offset)" 4
644 .IX Item "($row, $col) = $line->coord_of ($offset)"
645 Translates a string offset into terminal coordinates again.
646 .RE
647 .RS 4
648 .RE
649 .ie n .IP "($row, $col\fR) = \f(CW$line\fR\->coord_of ($offset) =item \f(CW$text\fR = \f(CW$term\fR\->special_encode \f(CW$string" 4
650 .el .IP "($row, \f(CW$col\fR) = \f(CW$line\fR\->coord_of ($offset) =item \f(CW$text\fR = \f(CW$term\fR\->special_encode \f(CW$string\fR" 4
651 .IX Item "($row, $col) = $line->coord_of ($offset) =item $text = $term->special_encode $string"
652 Converts a perl string into the special encoding used by rxvt\-unicode,
653 where one character corresponds to one screen cell. See
654 \&\f(CW\*(C`$term\->ROW_t\*(C'\fR for details.
655 .ie n .IP "$string = $term\fR\->special_decode \f(CW$text" 4
656 .el .IP "$string = \f(CW$term\fR\->special_decode \f(CW$text\fR" 4
657 .IX Item "$string = $term->special_decode $text"
658 Converts rxvt-unicodes text reprsentation into a perl string. See
659 \&\f(CW\*(C`$term\->ROW_t\*(C'\fR for details.
660 .ie n .Sh "The ""urxvt::timer"" Class"
661 .el .Sh "The \f(CWurxvt::timer\fP Class"
662 .IX Subsection "The urxvt::timer Class"
663 This class implements timer watchers/events. Time is represented as a
664 fractional number of seconds since the epoch. Example:
665 .PP
666 .Vb 8
667 \& $term->{overlay} = $term->overlay (-1, 0, 8, 1, urxvt::OVERLAY_RSTYLE, 0);
668 \& $term->{timer} = urxvt::timer
669 \& ->new
670 \& ->interval (1)
671 \& ->cb (sub {
672 \& $term->{overlay}->set (0, 0,
673 \& sprintf "%2d:%02d:%02d", (localtime urxvt::NOW)[2,1,0]);
674 \& });
675 .Ve
676 .IP "$timer = new urxvt::timer" 4
677 .IX Item "$timer = new urxvt::timer"
678 Create a new timer object in started state. It is scheduled to fire
679 immediately.
680 .ie n .IP "$timer = $timer\fR\->cb (sub { my ($timer) = \f(CW@_; ... })" 4
681 .el .IP "$timer = \f(CW$timer\fR\->cb (sub { my ($timer) = \f(CW@_\fR; ... })" 4
682 .IX Item "$timer = $timer->cb (sub { my ($timer) = @_; ... })"
683 Set the callback to be called when the timer triggers.
684 .ie n .IP "$tstamp = $timer\->at" 4
685 .el .IP "$tstamp = \f(CW$timer\fR\->at" 4
686 .IX Item "$tstamp = $timer->at"
687 Return the time this watcher will fire next.
688 .ie n .IP "$timer = $timer\->set ($tstamp)" 4
689 .el .IP "$timer = \f(CW$timer\fR\->set ($tstamp)" 4
690 .IX Item "$timer = $timer->set ($tstamp)"
691 Set the time the event is generated to \f(CW$tstamp\fR.
692 .ie n .IP "$timer = $timer\->interval ($interval)" 4
693 .el .IP "$timer = \f(CW$timer\fR\->interval ($interval)" 4
694 .IX Item "$timer = $timer->interval ($interval)"
695 Normally (and when \f(CW$interval\fR is \f(CW0\fR), the timer will automatically
696 stop after it has fired once. If \f(CW$interval\fR is non\-zero, then the timer
697 is automatically rescheduled at the given intervals.
698 .ie n .IP "$timer = $timer\->start" 4
699 .el .IP "$timer = \f(CW$timer\fR\->start" 4
700 .IX Item "$timer = $timer->start"
701 Start the timer.
702 .ie n .IP "$timer = $timer\->start ($tstamp)" 4
703 .el .IP "$timer = \f(CW$timer\fR\->start ($tstamp)" 4
704 .IX Item "$timer = $timer->start ($tstamp)"
705 Set the event trigger time to \f(CW$tstamp\fR and start the timer.
706 .ie n .IP "$timer = $timer\->stop" 4
707 .el .IP "$timer = \f(CW$timer\fR\->stop" 4
708 .IX Item "$timer = $timer->stop"
709 Stop the timer.
710 .ie n .Sh "The ""urxvt::iow"" Class"
711 .el .Sh "The \f(CWurxvt::iow\fP Class"
712 .IX Subsection "The urxvt::iow Class"
713 This class implements io watchers/events. Example:
714 .PP
715 .Vb 12
716 \& $term->{socket} = ...
717 \& $term->{iow} = urxvt::iow
718 \& ->new
719 \& ->fd (fileno $term->{socket})
720 \& ->events (1) # wait for read data
721 \& ->start
722 \& ->cb (sub {
723 \& my ($iow, $revents) = @_;
724 \& # $revents must be 1 here, no need to check
725 \& sysread $term->{socket}, my $buf, 8192
726 \& or end-of-file;
727 \& });
728 .Ve
729 .IP "$iow = new urxvt::iow" 4
730 .IX Item "$iow = new urxvt::iow"
731 Create a new io watcher object in stopped state.
732 .ie n .IP "$iow = $iow\fR\->cb (sub { my ($iow, \f(CW$reventmask\fR) = \f(CW@_; ... })" 4
733 .el .IP "$iow = \f(CW$iow\fR\->cb (sub { my ($iow, \f(CW$reventmask\fR) = \f(CW@_\fR; ... })" 4
734 .IX Item "$iow = $iow->cb (sub { my ($iow, $reventmask) = @_; ... })"
735 Set the callback to be called when io events are triggered. \f(CW$reventmask\fR
736 is a bitset as described in the \f(CW\*(C`events\*(C'\fR method.
737 .ie n .IP "$iow = $iow\->fd ($fd)" 4
738 .el .IP "$iow = \f(CW$iow\fR\->fd ($fd)" 4
739 .IX Item "$iow = $iow->fd ($fd)"
740 Set the filedescriptor (not handle) to watch.
741 .ie n .IP "$iow = $iow\->events ($eventmask)" 4
742 .el .IP "$iow = \f(CW$iow\fR\->events ($eventmask)" 4
743 .IX Item "$iow = $iow->events ($eventmask)"
744 Set the event mask to watch. Bit #0 (value \f(CW1\fR) enables watching for read
745 data, Bit #1 (value \f(CW2\fR) enables watching for write data.
746 .ie n .IP "$iow = $iow\->start" 4
747 .el .IP "$iow = \f(CW$iow\fR\->start" 4
748 .IX Item "$iow = $iow->start"
749 Start watching for requested events on the given handle.
750 .ie n .IP "$iow = $iow\->stop" 4
751 .el .IP "$iow = \f(CW$iow\fR\->stop" 4
752 .IX Item "$iow = $iow->stop"
753 Stop watching for events on the given filehandle.
754 .SH "ENVIRONMENT"
755 .IX Header "ENVIRONMENT"
756 .Sh "\s-1URXVT_PERL_VERBOSITY\s0"
757 .IX Subsection "URXVT_PERL_VERBOSITY"
758 This variable controls the verbosity level of the perl extension. Higher
759 numbers indicate more verbose output.
760 .IP "0 \- only fatal messages" 4
761 .IX Item "0 - only fatal messages"
762 .PD 0
763 .IP "3 \- script loading and management" 4
764 .IX Item "3 - script loading and management"
765 .IP "10 \- all events received" 4
766 .IX Item "10 - all events received"
767 .PD
768 .SH "AUTHOR"
769 .IX Header "AUTHOR"
770 .Vb 2
771 \& Marc Lehmann <pcg@goof.com>
772 \& http://software.schmorp.de/pkg/rxvt-unicode
773 .Ve