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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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# 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 root 1.9 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 root 1.6 .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 root 1.8 Displays a digital clock using the built-in overlay.
195     .IP "example-refresh-hooks" 4
196     .IX Item "example-refresh-hooks"
197 root 1.6 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 root 1.3 .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 root 1.9 \&\f(CW\*(C`_hook\*(C'\fR) are reserved for internal uses and \fB\s-1MUST\s0 \s-1NOT\s0\fR be accessed or
206 root 1.3 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 root 1.1 .Sh "Hooks"
213     .IX Subsection "Hooks"
214 root 1.9 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 root 1.1 .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 root 1.9 .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 root 1.1 .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 root 1.5 .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, $string"
314     Called whenever the user presses a key combination that has a
315     \&\f(CW\*(C`perl:string\*(C'\fR action bound to it (see description of the \fBkeysym\fR
316     resource in the @@RXVT_NAME@@(1) manpage).
317 root 1.9 .ie n .Sh "Variables in the ""urxvt"" Package"
318     .el .Sh "Variables in the \f(CWurxvt\fP Package"
319     .IX Subsection "Variables in the urxvt Package"
320     .IP "$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 root 1.1 .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 $string"
336 root 1.3 Calls \f(CW\*(C`rxvt_warn\*(C'\fR with the given string which should not include a
337 root 1.1 newline. The module also overwrites the \f(CW\*(C`warn\*(C'\fR builtin with a function
338     that calls this function.
339     .Sp
340     Using this function has the advantage that its output ends up in the
341     correct place, e.g. on stderr of the connecting urxvtc client.
342     .IP "$time = urxvt::NOW" 4
343     .IX Item "$time = urxvt::NOW"
344     Returns the \*(L"current time\*(R" (as per the event loop).
345 root 1.8 .Sh "\s-1RENDITION\s0"
346     .IX Subsection "RENDITION"
347     Rendition bitsets contain information about colour, font, font styles and
348     similar information for each screen cell.
349     .PP
350     The following \*(L"macros\*(R" deal with changes in rendition sets. You should
351     never just create a bitset, you should always modify an existing one,
352     as they contain important information required for correct operation of
353     rxvt\-unicode.
354     .IP "$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, $new_value)"
393     Change the custom value.
394 root 1.1 .ie n .Sh "The ""urxvt::term"" Class"
395     .el .Sh "The \f(CWurxvt::term\fP Class"
396     .IX Subsection "The urxvt::term Class"
397 root 1.2 .ie n .IP "$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 root 1.4 \& italicFont jumpScroll lineSpace loginShell mapAlert menu meta8 modifier
425     \& mouseWheelScrollPage name pastableTabs path perl_eval perl_ext
426 root 1.3 \& 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 root 1.2 .Ve
433 root 1.1 .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$newtext\fR.
455 root 1.8 .Sp
456     #=item \f(CW$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[, $border]])"
485 root 1.1 Create a new (empty) overlay at the given position with the given
486 root 1.8 width/height. \f(CW$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$y\fR is negative, then this is counted from the
493     right/bottom side, respectively.
494     .Sp
495     This method returns an urxvt::overlay object. The overlay will be visible
496     as long as the perl object is referenced.
497     .Sp
498 root 1.9 The methods currently supported on \f(CW\*(C`urxvt::overlay\*(C'\fR objects are:
499     .RS 4
500 root 1.8 .ie n .IP "$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`$term\->ROW_r\*(C'\fR in that it puts
504     text in rxvt\-unicode's special encoding and an array of rendition values
505     at a specific position inside the overlay.
506 root 1.9 .IP "$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 "$overlay->show"
511     If hidden, display the overlay again.
512     .RE
513     .RS 4
514     .RE
515 root 1.3 .ie n .IP "$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 root 1.6 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 root 1.9 line \f(CW\*(C`\-$term\->nsaved\*(C'\fR. Nothing will be returned if a nonexistent line
567     is requested.
568 root 1.6 .Sp
569     If \f(CW$new_text\fR is specified, it will replace characters in the current
570     line, starting at column \f(CW$start_col\fR (default \f(CW0\fR), which is useful
571 root 1.8 to replace only parts of a line. The font index in the rendition will
572 root 1.6 automatically be updated.
573     .Sp
574     \&\f(CW$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`$term\->ROW_t\*(C'\fR.
592     .Sp
593     When setting rendition, the font mask will be ignored.
594     .Sp
595 root 1.8 See the section on \s-1RENDITION\s0, above.
596 root 1.6 .ie n .IP "$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[, $new_length])"
599 root 1.9 Returns the number of screen cells that are in use (\*(L"the line
600     length\*(R"). Unlike the urxvt core, this returns \f(CW\*(C`$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 $string"
652 root 1.6 Converts a perl string into the special encoding used by rxvt\-unicode,
653     where one character corresponds to one screen cell. See
654     \&\f(CW\*(C`$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 root 1.1 .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 root 1.8 .Vb 8
667     \& $term->{overlay} = $term->overlay (-1, 0, 8, 1, urxvt::OVERLAY_RSTYLE, 0);
668 root 1.1 \& $term->{timer} = urxvt::timer
669     \& ->new
670 root 1.8 \& ->interval (1)
671 root 1.1 \& ->cb (sub {
672 root 1.8 \& $term->{overlay}->set (0, 0,
673     \& sprintf "%2d:%02d:%02d", (localtime urxvt::NOW)[2,1,0]);
674 root 1.1 \& });
675     .Ve
676     .IP "$timer = new urxvt::timer" 4
677     .IX Item "$timer = new urxvt::timer"
678 root 1.8 Create a new timer object in started state. It is scheduled to fire
679     immediately.
680 root 1.1 .ie n .IP "$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$tstamp\fR.
692 root 1.8 .ie n .IP "$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 root 1.1 .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 root 1.2 .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 root 1.1 .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