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Revision: 1.8
Committed: Tue Jan 3 04:20:37 2006 UTC (18 years, 6 months ago) by root
Branch: MAIN
Changes since 1.7: +116 -49 lines
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# User Rev Content
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131     .IX Title "rxvt 3"
132 root 1.6 .TH rxvt 3 "2006-01-03" "6.2" "RXVT-UNICODE"
133 root 1.1 .SH "NAME"
134 root 1.5 @@RXVT_NAME@@perl \- rxvt\-unicode's embedded perl interpreter
135 root 1.1 .SH "SYNOPSIS"
136     .IX Header "SYNOPSIS"
137 root 1.5 .Vb 1
138     \& # create a file grab_test in $HOME:
139     .Ve
140 root 1.1 .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 root 1.5 \& # start a @@RXVT_NAME@@ using it:
150     .Ve
151     .PP
152     .Vb 1
153     \& @@RXVT_NAME@@ --perl-lib $HOME -pe grab_test
154 root 1.1 .Ve
155     .SH "DESCRIPTION"
156     .IX Header "DESCRIPTION"
157 root 1.4 Everytime a terminal object gets created, scripts specified via the
158 root 1.5 \&\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 root 1.3 .PP
163     Each script will only ever be loaded once, even in @@RXVT_NAME@@d, where
164 root 1.7 scripts will be shared (but not enabled) for all terminals.
165     .Sh "Prepackaged Extensions"
166     .IX Subsection "Prepackaged Extensions"
167 root 1.6 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     Miscellaneous selection modifications.
178     .RS 4
179     .IP "rot13" 4
180     .IX Item "rot13"
181     Rot\-13 the selection when activated. Used via keyboard trigger:
182     .Sp
183     .Vb 1
184     \& URxvt.keysym.C-M-r: perl:selection:rot13
185     .Ve
186     .RE
187     .RS 4
188     .RE
189     .IP "digital-clock" 4
190     .IX Item "digital-clock"
191 root 1.8 Displays a digital clock using the built-in overlay.
192     .IP "example-refresh-hooks" 4
193     .IX Item "example-refresh-hooks"
194 root 1.6 Displays a very simple digital clock in the upper right corner of the
195     window. Illustrates overwriting the refresh callbacks to create your own
196     overlays or changes.
197 root 1.3 .Sh "General \s-1API\s0 Considerations"
198     .IX Subsection "General API Considerations"
199     All objects (such as terminals, time watchers etc.) are typical
200     reference-to-hash objects. The hash can be used to store anything you
201     like. All members starting with an underscore (such as \f(CW\*(C`_ptr\*(C'\fR or
202     \&\f(CW\*(C`_hook\*(C'\fR) are reserved for internal uses and must not be accessed or
203     modified).
204     .PP
205     When objects are destroyed on the \*(C+ side, the perl object hashes are
206     emptied, so its best to store related objects such as time watchers and
207     the like inside the terminal object so they get destroyed as soon as the
208     terminal is destroyed.
209 root 1.1 .Sh "Hooks"
210     .IX Subsection "Hooks"
211     The following subroutines can be declared in loaded scripts, and will be called
212     whenever the relevant event happens.
213     .PP
214     All of them must return a boolean value. If it is true, then the event
215     counts as being \fIconsumed\fR, and the invocation of other hooks is skipped,
216     and the relevant action might not be carried out by the \*(C+ code.
217     .PP
218     When in doubt, return a false value (preferably \f(CW\*(C`()\*(C'\fR).
219     .ie n .IP "on_init $term" 4
220     .el .IP "on_init \f(CW$term\fR" 4
221     .IX Item "on_init $term"
222     Called after a new terminal object has been initialized, but before
223     windows are created or the command gets run.
224     .ie n .IP "on_reset $term" 4
225     .el .IP "on_reset \f(CW$term\fR" 4
226     .IX Item "on_reset $term"
227     Called after the screen is \*(L"reset\*(R" for any reason, such as resizing or
228     control sequences. Here is where you can react on changes to size-related
229     variables.
230     .ie n .IP "on_start $term" 4
231     .el .IP "on_start \f(CW$term\fR" 4
232     .IX Item "on_start $term"
233     Called at the very end of initialisation of a new terminal, just before
234     returning to the mainloop.
235     .ie n .IP "on_sel_make $term\fR, \f(CW$eventtime" 4
236     .el .IP "on_sel_make \f(CW$term\fR, \f(CW$eventtime\fR" 4
237     .IX Item "on_sel_make $term, $eventtime"
238     Called whenever a selection has been made by the user, but before the
239     selection text is copied, so changes to the beginning, end or type of the
240     selection will be honored.
241     .Sp
242     Returning a true value aborts selection making by urxvt, in which case you
243     have to make a selection yourself by calling \f(CW\*(C`$term\->selection_grab\*(C'\fR.
244     .ie n .IP "on_sel_grab $term\fR, \f(CW$eventtime" 4
245     .el .IP "on_sel_grab \f(CW$term\fR, \f(CW$eventtime\fR" 4
246     .IX Item "on_sel_grab $term, $eventtime"
247     Called whenever a selection has been copied, but before the selection is
248     requested from the server. The selection text can be queried and changed
249     by calling \f(CW\*(C`$term\->selection\*(C'\fR.
250     .Sp
251     Returning a true value aborts selection grabbing. It will still be hilighted.
252     .ie n .IP "on_focus_in $term" 4
253     .el .IP "on_focus_in \f(CW$term\fR" 4
254     .IX Item "on_focus_in $term"
255     Called whenever the window gets the keyboard focus, before urxvt does
256     focus in processing.
257     .ie n .IP "on_focus_out $term" 4
258     .el .IP "on_focus_out \f(CW$term\fR" 4
259     .IX Item "on_focus_out $term"
260     Called wheneever the window loses keyboard focus, before urxvt does focus
261     out processing.
262     .ie n .IP "on_view_change $term\fR, \f(CW$offset" 4
263     .el .IP "on_view_change \f(CW$term\fR, \f(CW$offset\fR" 4
264     .IX Item "on_view_change $term, $offset"
265     Called whenever the view offset changes, i..e the user or program
266     scrolls. Offset \f(CW0\fR means display the normal terminal, positive values
267     show this many lines of scrollback.
268     .ie n .IP "on_scroll_back $term\fR, \f(CW$lines\fR, \f(CW$saved" 4
269     .el .IP "on_scroll_back \f(CW$term\fR, \f(CW$lines\fR, \f(CW$saved\fR" 4
270     .IX Item "on_scroll_back $term, $lines, $saved"
271     Called whenever lines scroll out of the terminal area into the scrollback
272     buffer. \f(CW$lines\fR is the number of lines scrolled out and may be larger
273     than the scroll back buffer or the terminal.
274     .Sp
275     It is called before lines are scrolled out (so rows 0 .. min ($lines \- 1,
276     \&\f(CW$nrow\fR \- 1) represent the lines to be scrolled out). \f(CW$saved\fR is the total
277     number of lines that will be in the scrollback buffer.
278     .ie n .IP "on_tty_activity $term *NYI*" 4
279     .el .IP "on_tty_activity \f(CW$term\fR *NYI*" 4
280     .IX Item "on_tty_activity $term *NYI*"
281     Called whenever the program(s) running in the urxvt window send output.
282     .ie n .IP "on_refresh_begin $term" 4
283     .el .IP "on_refresh_begin \f(CW$term\fR" 4
284     .IX Item "on_refresh_begin $term"
285     Called just before the screen gets redrawn. Can be used for overlay
286     or similar effects by modify terminal contents in refresh_begin, and
287     restoring them in refresh_end. The built-in overlay and selection display
288     code is run after this hook, and takes precedence.
289     .ie n .IP "on_refresh_end $term" 4
290     .el .IP "on_refresh_end \f(CW$term\fR" 4
291     .IX Item "on_refresh_end $term"
292     Called just after the screen gets redrawn. See \f(CW\*(C`on_refresh_begin\*(C'\fR.
293 root 1.5 .ie n .IP "on_keyboard_command $term\fR, \f(CW$string" 4
294     .el .IP "on_keyboard_command \f(CW$term\fR, \f(CW$string\fR" 4
295     .IX Item "on_keyboard_command $term, $string"
296     Called whenever the user presses a key combination that has a
297     \&\f(CW\*(C`perl:string\*(C'\fR action bound to it (see description of the \fBkeysym\fR
298     resource in the @@RXVT_NAME@@(1) manpage).
299 root 1.1 .ie n .Sh "Functions in the ""urxvt"" Package"
300     .el .Sh "Functions in the \f(CWurxvt\fP Package"
301     .IX Subsection "Functions in the urxvt Package"
302     .ie n .IP "urxvt::fatal $errormessage" 4
303     .el .IP "urxvt::fatal \f(CW$errormessage\fR" 4
304     .IX Item "urxvt::fatal $errormessage"
305     Fatally aborts execution with the given error message. Avoid at all
306     costs! The only time this is acceptable is when the terminal process
307     starts up.
308     .ie n .IP "urxvt::warn $string" 4
309     .el .IP "urxvt::warn \f(CW$string\fR" 4
310     .IX Item "urxvt::warn $string"
311 root 1.3 Calls \f(CW\*(C`rxvt_warn\*(C'\fR with the given string which should not include a
312 root 1.1 newline. The module also overwrites the \f(CW\*(C`warn\*(C'\fR builtin with a function
313     that calls this function.
314     .Sp
315     Using this function has the advantage that its output ends up in the
316     correct place, e.g. on stderr of the connecting urxvtc client.
317     .IP "$time = urxvt::NOW" 4
318     .IX Item "$time = urxvt::NOW"
319     Returns the \*(L"current time\*(R" (as per the event loop).
320 root 1.8 .Sh "\s-1RENDITION\s0"
321     .IX Subsection "RENDITION"
322     Rendition bitsets contain information about colour, font, font styles and
323     similar information for each screen cell.
324     .PP
325     The following \*(L"macros\*(R" deal with changes in rendition sets. You should
326     never just create a bitset, you should always modify an existing one,
327     as they contain important information required for correct operation of
328     rxvt\-unicode.
329     .IP "$rend = urxvt::DEFAULT_RSTYLE" 4
330     .IX Item "$rend = urxvt::DEFAULT_RSTYLE"
331     Returns the default rendition, as used when the terminal is starting up or
332     being reset. Useful as a base to start when creating renditions.
333     .IP "$rend = urxvt::OVERLAY_RSTYLE" 4
334     .IX Item "$rend = urxvt::OVERLAY_RSTYLE"
335     Return the rendition mask used for overlays by default.
336     .IP "$rendbit = urxvt::RS_Bold, RS_Italic, RS_Blink, RS_RVid, RS_Uline" 4
337     .IX Item "$rendbit = urxvt::RS_Bold, RS_Italic, RS_Blink, RS_RVid, RS_Uline"
338     Return the bit that enabled bold, italic, blink, reverse-video and
339     underline, respectively. To enable such a style, just logically \s-1OR\s0 it into
340     the bitset.
341     .ie n .IP "$foreground = urxvt::GET_BASEFG $rend" 4
342     .el .IP "$foreground = urxvt::GET_BASEFG \f(CW$rend\fR" 4
343     .IX Item "$foreground = urxvt::GET_BASEFG $rend"
344     .PD 0
345     .ie n .IP "$background = urxvt::GET_BASEBG $rend" 4
346     .el .IP "$background = urxvt::GET_BASEBG \f(CW$rend\fR" 4
347     .IX Item "$background = urxvt::GET_BASEBG $rend"
348     .PD
349     Return the foreground/background colour index, respectively.
350     .ie n .IP "$rend = urxvt::SET_FGCOLOR ($rend, $new_colour)" 4
351     .el .IP "$rend = urxvt::SET_FGCOLOR ($rend, \f(CW$new_colour\fR)" 4
352     .IX Item "$rend = urxvt::SET_FGCOLOR ($rend, $new_colour)"
353     .PD 0
354     .ie n .IP "$rend = urxvt::SET_BGCOLOR ($rend, $new_colour)" 4
355     .el .IP "$rend = urxvt::SET_BGCOLOR ($rend, \f(CW$new_colour\fR)" 4
356     .IX Item "$rend = urxvt::SET_BGCOLOR ($rend, $new_colour)"
357     .PD
358     Replace the foreground/background colour in the rendition mask with the
359     specified one.
360     .IP "$value = urxvt::GET_CUSTOM ($rend)" 4
361     .IX Item "$value = urxvt::GET_CUSTOM ($rend)"
362     Return the \*(L"custom\*(R" value: Every rendition has 5 bits for use by
363     extensions. They can be set and changed as you like and are initially
364     zero.
365     .ie n .IP "$rend = urxvt::SET_CUSTOM ($rend, $new_value)" 4
366     .el .IP "$rend = urxvt::SET_CUSTOM ($rend, \f(CW$new_value\fR)" 4
367     .IX Item "$rend = urxvt::SET_CUSTOM ($rend, $new_value)"
368     Change the custom value.
369 root 1.1 .ie n .Sh "The ""urxvt::term"" Class"
370     .el .Sh "The \f(CWurxvt::term\fP Class"
371     .IX Subsection "The urxvt::term Class"
372 root 1.2 .ie n .IP "$value = $term\fR\->resource ($name[, \f(CW$newval])" 4
373     .el .IP "$value = \f(CW$term\fR\->resource ($name[, \f(CW$newval\fR])" 4
374     .IX Item "$value = $term->resource ($name[, $newval])"
375     Returns the current resource value associated with a given name and
376     optionally sets a new value. Setting values is most useful in the \f(CW\*(C`init\*(C'\fR
377     hook. Unset resources are returned and accepted as \f(CW\*(C`undef\*(C'\fR.
378     .Sp
379     The new value must be properly encoded to a suitable character encoding
380     before passing it to this method. Similarly, the returned value may need
381     to be converted from the used encoding to text.
382     .Sp
383     Resource names are as defined in \fIsrc/rsinc.h\fR. Colours can be specified
384     as resource names of the form \f(CW\*(C`color+<index>\*(C'\fR, e.g. \f(CW\*(C`color+5\*(C'\fR. (will
385     likely change).
386     .Sp
387     Please note that resource strings will currently only be freed when the
388     terminal is destroyed, so changing options frequently will eat memory.
389     .Sp
390     Here is a a likely non-exhaustive list of resource names, not all of which
391     are supported in every build, please see the source to see the actual
392     list:
393     .Sp
394     .Vb 12
395     \& answerbackstring backgroundPixmap backspace_key boldFont boldItalicFont
396     \& borderLess color cursorBlink cursorUnderline cutchars delete_key
397     \& display_name embed ext_bwidth fade font geometry hold iconName
398     \& imFont imLocale inputMethod insecure int_bwidth intensityStyles
399 root 1.4 \& italicFont jumpScroll lineSpace loginShell mapAlert menu meta8 modifier
400     \& mouseWheelScrollPage name pastableTabs path perl_eval perl_ext
401 root 1.3 \& perl_lib pointerBlank pointerBlankDelay preeditType print_pipe pty_fd
402     \& reverseVideo saveLines scrollBar scrollBar_align scrollBar_floating
403     \& scrollBar_right scrollBar_thickness scrollTtyKeypress scrollTtyOutput
404     \& scrollWithBuffer scrollstyle secondaryScreen secondaryScroll selectstyle
405     \& shade term_name title transparent transparent_all tripleclickwords
406     \& utmpInhibit visualBell
407 root 1.2 .Ve
408 root 1.1 .ie n .IP "($row, $col\fR) = \f(CW$term\fR\->selection_mark ([$row, \f(CW$col])" 4
409     .el .IP "($row, \f(CW$col\fR) = \f(CW$term\fR\->selection_mark ([$row, \f(CW$col\fR])" 4
410     .IX Item "($row, $col) = $term->selection_mark ([$row, $col])"
411     .PD 0
412     .ie n .IP "($row, $col\fR) = \f(CW$term\fR\->selection_beg ([$row, \f(CW$col])" 4
413     .el .IP "($row, \f(CW$col\fR) = \f(CW$term\fR\->selection_beg ([$row, \f(CW$col\fR])" 4
414     .IX Item "($row, $col) = $term->selection_beg ([$row, $col])"
415     .ie n .IP "($row, $col\fR) = \f(CW$term\fR\->selection_end ([$row, \f(CW$col])" 4
416     .el .IP "($row, \f(CW$col\fR) = \f(CW$term\fR\->selection_end ([$row, \f(CW$col\fR])" 4
417     .IX Item "($row, $col) = $term->selection_end ([$row, $col])"
418     .PD
419     Return the current values of the selection mark, begin or end positions,
420     and optionally set them to new values.
421     .ie n .IP "$success = $term\->selection_grab ($eventtime)" 4
422     .el .IP "$success = \f(CW$term\fR\->selection_grab ($eventtime)" 4
423     .IX Item "$success = $term->selection_grab ($eventtime)"
424     Try to request the primary selection from the server (for example, as set
425     by the next method).
426     .ie n .IP "$oldtext = $term\->selection ([$newtext])" 4
427     .el .IP "$oldtext = \f(CW$term\fR\->selection ([$newtext])" 4
428     .IX Item "$oldtext = $term->selection ([$newtext])"
429     Return the current selection text and optionally replace it by \f(CW$newtext\fR.
430 root 1.8 .Sp
431     #=item \f(CW$term\fR\->overlay ($x, \f(CW$y\fR, \f(CW$text\fR)
432     #
433     #Create a simple multi-line overlay box. See the next method for details.
434     #
435     #=cut
436     .Sp
437     sub urxvt::term::scr_overlay {
438     die;
439     my ($self, \f(CW$x\fR, \f(CW$y\fR, \f(CW$text\fR) = \f(CW@_\fR;
440     .Sp
441     .Vb 1
442     \& my @lines = split /\en/, $text;
443     .Ve
444     .Sp
445     .Vb 4
446     \& my $w = 0;
447     \& for (map $self->strwidth ($_), @lines) {
448     \& $w = $_ if $w < $_;
449     \& }
450     .Ve
451     .Sp
452     .Vb 3
453     \& $self->scr_overlay_new ($x, $y, $w, scalar @lines);
454     \& $self->scr_overlay_set (0, $_, $lines[$_]) for 0.. $#lines;
455     \&}
456     .Ve
457     .ie n .IP "$term\->overlay ($x, $y\fR, \f(CW$width\fR, \f(CW$height\fR[, \f(CW$rstyle\fR[, \f(CW$border]])" 4
458     .el .IP "$term\->overlay ($x, \f(CW$y\fR, \f(CW$width\fR, \f(CW$height\fR[, \f(CW$rstyle\fR[, \f(CW$border\fR]])" 4
459     .IX Item "$term->overlay ($x, $y, $width, $height[, $rstyle[, $border]])"
460 root 1.1 Create a new (empty) overlay at the given position with the given
461 root 1.8 width/height. \f(CW$rstyle\fR defines the initial rendition style
462     (default: \f(CW\*(C`OVERLAY_RSTYLE\*(C'\fR).
463     .Sp
464     If \f(CW$border\fR is \f(CW2\fR (default), then a decorative border will be put
465     around the box.
466     .Sp
467     If either \f(CW$x\fR or \f(CW$y\fR is negative, then this is counted from the
468     right/bottom side, respectively.
469     .Sp
470     This method returns an urxvt::overlay object. The overlay will be visible
471     as long as the perl object is referenced.
472     .Sp
473     Currently, the only method on the \f(CW\*(C`urxvt::overlay\*(C'\fR object is \f(CW\*(C`set\*(C'\fR:
474     .ie n .IP "$overlay\->set ($x, $y\fR, \f(CW$text\fR, \f(CW$rend)" 4
475     .el .IP "$overlay\->set ($x, \f(CW$y\fR, \f(CW$text\fR, \f(CW$rend\fR)" 4
476     .IX Item "$overlay->set ($x, $y, $text, $rend)"
477     Similar to \f(CW\*(C`$term\->ROW_t\*(C'\fR and \f(CW\*(C`$term\->ROW_r\*(C'\fR in that it puts
478     text in rxvt\-unicode's special encoding and an array of rendition values
479     at a specific position inside the overlay.
480 root 1.3 .ie n .IP "$cellwidth = $term\fR\->strwidth \f(CW$string" 4
481     .el .IP "$cellwidth = \f(CW$term\fR\->strwidth \f(CW$string\fR" 4
482     .IX Item "$cellwidth = $term->strwidth $string"
483     Returns the number of screen-cells this string would need. Correctly
484     accounts for wide and combining characters.
485     .ie n .IP "$octets = $term\fR\->locale_encode \f(CW$string" 4
486     .el .IP "$octets = \f(CW$term\fR\->locale_encode \f(CW$string\fR" 4
487     .IX Item "$octets = $term->locale_encode $string"
488     Convert the given text string into the corresponding locale encoding.
489     .ie n .IP "$string = $term\fR\->locale_decode \f(CW$octets" 4
490     .el .IP "$string = \f(CW$term\fR\->locale_decode \f(CW$octets\fR" 4
491     .IX Item "$string = $term->locale_decode $octets"
492     Convert the given locale-encoded octets into a perl string.
493     .IP "$term\->tt_write ($octets)" 4
494     .IX Item "$term->tt_write ($octets)"
495     Write the octets given in \f(CW$data\fR to the tty (i.e. as program input). To
496 root 1.6 pass characters instead of octets, you should convert your strings first
497     to the locale-specific encoding using \f(CW\*(C`$term\->locale_encode\*(C'\fR.
498     .ie n .IP "$nrow = $term\->nrow" 4
499     .el .IP "$nrow = \f(CW$term\fR\->nrow" 4
500     .IX Item "$nrow = $term->nrow"
501     .PD 0
502     .ie n .IP "$ncol = $term\->ncol" 4
503     .el .IP "$ncol = \f(CW$term\fR\->ncol" 4
504     .IX Item "$ncol = $term->ncol"
505     .PD
506     Return the number of rows/columns of the terminal window (i.e. as
507     specified by \f(CW\*(C`\-geometry\*(C'\fR, excluding any scrollback).
508     .ie n .IP "$nsaved = $term\->nsaved" 4
509     .el .IP "$nsaved = \f(CW$term\fR\->nsaved" 4
510     .IX Item "$nsaved = $term->nsaved"
511     Returns the number of lines in the scrollback buffer.
512     .ie n .IP "$view_start = $term\->view_start ([$newvalue])" 4
513     .el .IP "$view_start = \f(CW$term\fR\->view_start ([$newvalue])" 4
514     .IX Item "$view_start = $term->view_start ([$newvalue])"
515     Returns the negative row number of the topmost line. Minimum value is
516     \&\f(CW0\fR, which displays the normal terminal contents. Larger values scroll
517     this many lines into the scrollback buffer.
518     .IP "$term\->want_refresh" 4
519     .IX Item "$term->want_refresh"
520     Requests a screen refresh. At the next opportunity, rxvt-unicode will
521     compare the on-screen display with its stored representation. If they
522     differ, it redraws the differences.
523     .Sp
524     Used after changing terminal contents to display them.
525     .ie n .IP "$text = $term\fR\->ROW_t ($row_number[, \f(CW$new_text\fR[, \f(CW$start_col]])" 4
526     .el .IP "$text = \f(CW$term\fR\->ROW_t ($row_number[, \f(CW$new_text\fR[, \f(CW$start_col\fR]])" 4
527     .IX Item "$text = $term->ROW_t ($row_number[, $new_text[, $start_col]])"
528     Returns the text of the entire row with number \f(CW$row_number\fR. Row \f(CW0\fR
529     is the topmost terminal line, row \f(CW\*(C`$term\->$ncol\-1\*(C'\fR is the bottommost
530     terminal line. The scrollback buffer starts at line \f(CW\*(C`\-1\*(C'\fR and extends to
531     line \f(CW\*(C`\-$term\->nsaved\*(C'\fR.
532     .Sp
533     If \f(CW$new_text\fR is specified, it will replace characters in the current
534     line, starting at column \f(CW$start_col\fR (default \f(CW0\fR), which is useful
535 root 1.8 to replace only parts of a line. The font index in the rendition will
536 root 1.6 automatically be updated.
537     .Sp
538     \&\f(CW$text\fR is in a special encoding: tabs and wide characters that use more
539     than one cell when displayed are padded with urxvt::NOCHAR characters
540     (\f(CW\*(C`chr 65535\*(C'\fR). Characters with combining characters and other characters
541     that do not fit into the normal tetx encoding will be replaced with
542     characters in the private use area.
543     .Sp
544     You have to obey this encoding when changing text. The advantage is
545     that \f(CW\*(C`substr\*(C'\fR and similar functions work on screen cells and not on
546     characters.
547     .Sp
548     The methods \f(CW\*(C`$term\->special_encode\*(C'\fR and \f(CW\*(C`$term\->special_decode\*(C'\fR
549     can be used to convert normal strings into this encoding and vice versa.
550     .ie n .IP "$rend = $term\fR\->ROW_r ($row_number[, \f(CW$new_rend\fR[, \f(CW$start_col]])" 4
551     .el .IP "$rend = \f(CW$term\fR\->ROW_r ($row_number[, \f(CW$new_rend\fR[, \f(CW$start_col\fR]])" 4
552     .IX Item "$rend = $term->ROW_r ($row_number[, $new_rend[, $start_col]])"
553     Like \f(CW\*(C`$term\->ROW_t\*(C'\fR, but returns an arrayref with rendition
554     bitsets. Rendition bitsets contain information about colour, font, font
555     styles and similar information. See also \f(CW\*(C`$term\->ROW_t\*(C'\fR.
556     .Sp
557     When setting rendition, the font mask will be ignored.
558     .Sp
559 root 1.8 See the section on \s-1RENDITION\s0, above.
560 root 1.6 .ie n .IP "$length = $term\fR\->ROW_l ($row_number[, \f(CW$new_length])" 4
561     .el .IP "$length = \f(CW$term\fR\->ROW_l ($row_number[, \f(CW$new_length\fR])" 4
562     .IX Item "$length = $term->ROW_l ($row_number[, $new_length])"
563     Returns the number of screen cells that are in use (\*(L"the line length\*(R"). If
564     it is \f(CW\*(C`\-1\*(C'\fR, then the line is part of a multiple-row logical \*(L"line\*(R", which
565     means all characters are in use and it is continued on the next row.
566     .ie n .IP "$text = $term\fR\->special_encode \f(CW$string" 4
567     .el .IP "$text = \f(CW$term\fR\->special_encode \f(CW$string\fR" 4
568     .IX Item "$text = $term->special_encode $string"
569     Converts a perl string into the special encoding used by rxvt\-unicode,
570     where one character corresponds to one screen cell. See
571     \&\f(CW\*(C`$term\->ROW_t\*(C'\fR for details.
572     .ie n .IP "$string = $term\fR\->special_decode \f(CW$text" 4
573     .el .IP "$string = \f(CW$term\fR\->special_decode \f(CW$text\fR" 4
574     .IX Item "$string = $term->special_decode $text"
575     Converts rxvt-unicodes text reprsentation into a perl string. See
576     \&\f(CW\*(C`$term\->ROW_t\*(C'\fR for details.
577 root 1.1 .ie n .Sh "The ""urxvt::timer"" Class"
578     .el .Sh "The \f(CWurxvt::timer\fP Class"
579     .IX Subsection "The urxvt::timer Class"
580     This class implements timer watchers/events. Time is represented as a
581     fractional number of seconds since the epoch. Example:
582     .PP
583 root 1.8 .Vb 8
584     \& $term->{overlay} = $term->overlay (-1, 0, 8, 1, urxvt::OVERLAY_RSTYLE, 0);
585 root 1.1 \& $term->{timer} = urxvt::timer
586     \& ->new
587 root 1.8 \& ->interval (1)
588 root 1.1 \& ->cb (sub {
589 root 1.8 \& $term->{overlay}->set (0, 0,
590     \& sprintf "%2d:%02d:%02d", (localtime urxvt::NOW)[2,1,0]);
591 root 1.1 \& });
592     .Ve
593     .IP "$timer = new urxvt::timer" 4
594     .IX Item "$timer = new urxvt::timer"
595 root 1.8 Create a new timer object in started state. It is scheduled to fire
596     immediately.
597 root 1.1 .ie n .IP "$timer = $timer\fR\->cb (sub { my ($timer) = \f(CW@_; ... })" 4
598     .el .IP "$timer = \f(CW$timer\fR\->cb (sub { my ($timer) = \f(CW@_\fR; ... })" 4
599     .IX Item "$timer = $timer->cb (sub { my ($timer) = @_; ... })"
600     Set the callback to be called when the timer triggers.
601     .ie n .IP "$tstamp = $timer\->at" 4
602     .el .IP "$tstamp = \f(CW$timer\fR\->at" 4
603     .IX Item "$tstamp = $timer->at"
604     Return the time this watcher will fire next.
605     .ie n .IP "$timer = $timer\->set ($tstamp)" 4
606     .el .IP "$timer = \f(CW$timer\fR\->set ($tstamp)" 4
607     .IX Item "$timer = $timer->set ($tstamp)"
608     Set the time the event is generated to \f(CW$tstamp\fR.
609 root 1.8 .ie n .IP "$timer = $timer\->interval ($interval)" 4
610     .el .IP "$timer = \f(CW$timer\fR\->interval ($interval)" 4
611     .IX Item "$timer = $timer->interval ($interval)"
612     Normally (and when \f(CW$interval\fR is \f(CW0\fR), the timer will automatically
613     stop after it has fired once. If \f(CW$interval\fR is non\-zero, then the timer
614     is automatically rescheduled at the given intervals.
615 root 1.1 .ie n .IP "$timer = $timer\->start" 4
616     .el .IP "$timer = \f(CW$timer\fR\->start" 4
617     .IX Item "$timer = $timer->start"
618     Start the timer.
619     .ie n .IP "$timer = $timer\->start ($tstamp)" 4
620     .el .IP "$timer = \f(CW$timer\fR\->start ($tstamp)" 4
621     .IX Item "$timer = $timer->start ($tstamp)"
622     Set the event trigger time to \f(CW$tstamp\fR and start the timer.
623     .ie n .IP "$timer = $timer\->stop" 4
624     .el .IP "$timer = \f(CW$timer\fR\->stop" 4
625     .IX Item "$timer = $timer->stop"
626     Stop the timer.
627     .ie n .Sh "The ""urxvt::iow"" Class"
628     .el .Sh "The \f(CWurxvt::iow\fP Class"
629     .IX Subsection "The urxvt::iow Class"
630     This class implements io watchers/events. Example:
631     .PP
632     .Vb 12
633     \& $term->{socket} = ...
634     \& $term->{iow} = urxvt::iow
635     \& ->new
636     \& ->fd (fileno $term->{socket})
637     \& ->events (1) # wait for read data
638     \& ->start
639     \& ->cb (sub {
640     \& my ($iow, $revents) = @_;
641     \& # $revents must be 1 here, no need to check
642     \& sysread $term->{socket}, my $buf, 8192
643     \& or end-of-file;
644     \& });
645     .Ve
646     .IP "$iow = new urxvt::iow" 4
647     .IX Item "$iow = new urxvt::iow"
648     Create a new io watcher object in stopped state.
649     .ie n .IP "$iow = $iow\fR\->cb (sub { my ($iow, \f(CW$reventmask\fR) = \f(CW@_; ... })" 4
650     .el .IP "$iow = \f(CW$iow\fR\->cb (sub { my ($iow, \f(CW$reventmask\fR) = \f(CW@_\fR; ... })" 4
651     .IX Item "$iow = $iow->cb (sub { my ($iow, $reventmask) = @_; ... })"
652     Set the callback to be called when io events are triggered. \f(CW$reventmask\fR
653     is a bitset as described in the \f(CW\*(C`events\*(C'\fR method.
654     .ie n .IP "$iow = $iow\->fd ($fd)" 4
655     .el .IP "$iow = \f(CW$iow\fR\->fd ($fd)" 4
656     .IX Item "$iow = $iow->fd ($fd)"
657     Set the filedescriptor (not handle) to watch.
658     .ie n .IP "$iow = $iow\->events ($eventmask)" 4
659     .el .IP "$iow = \f(CW$iow\fR\->events ($eventmask)" 4
660     .IX Item "$iow = $iow->events ($eventmask)"
661     Set the event mask to watch. Bit #0 (value \f(CW1\fR) enables watching for read
662     data, Bit #1 (value \f(CW2\fR) enables watching for write data.
663     .ie n .IP "$iow = $iow\->start" 4
664     .el .IP "$iow = \f(CW$iow\fR\->start" 4
665     .IX Item "$iow = $iow->start"
666     Start watching for requested events on the given handle.
667     .ie n .IP "$iow = $iow\->stop" 4
668     .el .IP "$iow = \f(CW$iow\fR\->stop" 4
669     .IX Item "$iow = $iow->stop"
670     Stop watching for events on the given filehandle.
671 root 1.2 .SH "ENVIRONMENT"
672     .IX Header "ENVIRONMENT"
673     .Sh "\s-1URXVT_PERL_VERBOSITY\s0"
674     .IX Subsection "URXVT_PERL_VERBOSITY"
675     This variable controls the verbosity level of the perl extension. Higher
676     numbers indicate more verbose output.
677     .IP "0 \- only fatal messages" 4
678     .IX Item "0 - only fatal messages"
679     .PD 0
680     .IP "3 \- script loading and management" 4
681     .IX Item "3 - script loading and management"
682     .IP "10 \- all events received" 4
683     .IX Item "10 - all events received"
684     .PD
685 root 1.1 .SH "AUTHOR"
686     .IX Header "AUTHOR"
687     .Vb 2
688     \& Marc Lehmann <pcg@goof.com>
689     \& http://software.schmorp.de/pkg/rxvt-unicode
690     .Ve