Add sweeprolog-view-news command and bump version to 0.14.0

* sweeprolog.el (sweeprolog-view-news): new command for viewing the
Sweep News file.

Document sweeprolog-file-at-point, file-name-at-point-functions

* (sweeprolog-xref-project-source-files): add progress reporting

don't use file-name-split for compatibility with older Emacsen

* sweeprolog.el: capitalize "Sweep" in major mode names

ADDED: command to pipe output of Prolog goals to Emacs buffers

* sweep.c (sweep_open_channel(), sweep_fd_open()): new helper
functions for obtaining Prolog streams from Emacs pipe buffers.
* sweep.pl (sweep_async_goal/2, sweep_interrupt_async_goal/2): new
predicates.
* sweeprolog.el (sweeprolog-async-goal): new command, executes a goal
in a separate thread and redirects its output to a buffer with mode..
(sweeprolog-async-goal-output-mode): new major mode, derived from
Compilation mode.
(sweeprolog-mode-map, sweeprolog-prefix-map, sweeprolog-menu): bind
sweeprolog-async-goal.
* README.org (Executing Prolog Asynchronously): new manual section.

FIXED: possible race condition when signaling new top-level threads

Announce recent changes in NEWS.org and bump version to 0.13.0

ENHANCED: consult with library index for finding predicate defs

* sweep.pl (sweep_predicate_location_/4): also check library_index/3.
* sweeprolog-tests.el: add test for finding the source location of a
predicate in the package clib.

expose new arithmetic functions support in library(prolog_colour)

FIXED: stale xref data when jumping across files with M-.

ADDED: right-click context menus in sweeprolog-mode

* sweeprolog.el (sweeprolog-context-menu-find-module)
(sweeprolog-context-menu-find-module-other-window)
(sweeprolog-context-menu-describe-module)
(sweeprolog-context-menu-find-file)
(sweeprolog-context-menu-find-file-other-window)
(sweeprolog-context-menu-describe-predicate): new commands, add to context menus by...
(sweeprolog-context-menu-for-predicate)
(sweeprolog-context-menu-for-module)
(sweeprolog-context-menu-for-file): new functions, used in...
(sweeprolog-context-menu-functions): new abnormal hook, used by...
(sweeprolog-context-menu-function): new function.
(sweeprolog-mode): add it to context-menu-functions.

* README.org (Context Menu): new section.

Announce recent changes in NEWS.org and bump version to 0.12.0

ADDED: short description for tokens on mouse hover (help-echo)

* sweep.pl (sweep_predicate_dependencies/2): new predicate.
* sweeprolog.el (sweeprolog-enable-help-echo): new user-option, when
non-nil sweeprolog-analyze-region-start-hook and
sweeprolog-analyze-region-fragment-hook are extended with...
(sweeprolog-analyze-start-help-echo)
(sweeprolog-analyze-fragment-help-echo): new functions, manage the
help-echo text property for Prolog text.
* README.org ("Hover for Help"): new section about help-echo.

ENHANCED: improve semantic highlighting for several constructs

* sweep.pl (sweep_color_normalized_/4): fix handling of non-callable
terms, propagate type error expected type to Elisp.
(sweeprolog_goal_kind_normalized/2): rename to...
(sweep_goal_kind_normalized/2): normalize all goal and head classes.
* sweeprolog.el (sweeprolog-analyze-fragment-to-faces): adapt to new
info from sweep_goal_kind_normalized/2, and highlight some missing
token kinds.

Announce recent changes in NEWS.org and bump version to 0.11.3

* README.org ("Initialization and Cleanup"): improve listings

* README.org: use ~code~ over =verbatim= more consistently

* README.org ("High-level Architecture"): fix out-of-date docs

* README.org ("Initialization and Cleanup"): use title case

* README.org ("Querying Prolog"): improve function listing

* (sweeprolog-prefix-map): bind sweeprolog-top-level-send-goal to q

DOC: improve listings in the "Editing Prolog Code" section

Bind C-c S-TAB to sweeprolog-backward-hole for symmetry

Add a couple of missing docstrings

* sweeprolog.el
(sweeprolog-read-predicate-documentation-with-holes)
(sweeprolog-read-predicate-documentation-default-function): add
docstrings.

* sweeprolog.el: fix some typos in docstrings

Refer to Sweep as a whole as "Sweep" without verbatim format

ADDED: command for sending a goal to top-level from any buffer

* sweeprolog.el (sweeprolog-top-level): extract buffer setup logic to...
(sweeprolog-top-level-buffer): new function.
(sweeprolog-top-level-send-string): new function, used by...
(sweeprolog-top-level-send-goal): new command, reads a goal from the
minibuffer and sends it to a Prolog top-level buffer.
(sweeprolog-mode-map): bind it to C-c C-q.
(sweeprolog-menu): add "Send Goal to Top-level" entry.
* README.org ("Sending Goals to the Top-level"): new manual section.

Support completion when reading a goal from the minibuffer

* sweeprolog.el (sweeprolog-read-goal-map): new keymap, derived from
sweeprolog-read-term-map.
(sweeprolog-goals-at-point): new function, similar to
sweeprolog-terms-at-point but only returns goal terms.
(sweeprolog-read-goal): use them.

DOC: explain how to follow source locations in top-level messages

MODIFIED: do not force set next-error buffer to Prolog buffer

Announce recent changes in NEWS.org and bump version 0.11.1

ENHANCED: use terms at point as "future history" for term-search

* sweep.pl (sweep_terms_at_point/2): new predicate.
* sweeprolog.el (sweeprolog-terms-at-point): new function.
(sweeprolog-read-term): use it for setting the future history.
(sweeprolog-read-goal): new function.
(sweeprolog-term-search): use it for reading a goal when called with
prefix argument.

Announce recent changes in NEWS.org and bump version to 0.11.1

ENHANCED: Support refining term searches with arbitrary goals

* sweep.pl (sweep_term_search/2): extend with an extra goal argument.
* sweeprolog.el (sweeprolog-read-term): new function, similar to
read--expression but for Prolog terms rather than Elisp expressions.
(sweeprolog-term-search): use it, and prompt for goal with prefix arg.

Announce recent changes in NEWS.org and bump version to 0.11.0

ENHANCED: restore original point when a term search is quit

* sweep.pl (list_tail/2): Fix possible non-termination

ADDED: command for finding terms subsumed by a given term

* sweep.pl (sweep_term_search/2): new predicate.
* sweeprolog.el (sweeprolog-term-search-in-buffer): new function.
(sweeprolog-term-search): new command.
* README.org ("Term Search"): new manual section.

FIXED: find next predicate definition more reliably

* sweep.pl (sweeprolog_beginning_of_last_predicate/2)
(sweeprolog_beginning_of_last_predicate/2): explicitly sort results,
don't assume xref_defined/3 yields ordered results.

Announce recent changes in NEWS.org and bump version to 0.10.1

Update copyright year

ADDED: user option to control predicate documentation composition

* sweeprolog.el
(sweeprolog-insert-pldoc-for-predicate): remove in favor of...
(sweeprolog-insert-predicate-documentation): new function.
 (sweeprolog-format-term-with-holes): new utility
function, used by...
(sweeprolog-read-predicate-documentation-with-holes)
(sweeprolog-read-predicate-documentation-default-function): new
functions, used for...
(sweeprolog-read-predicate-documentation-function): new user option,
used by...
(sweeprolog-read-predicate-documentation): new function, used by...
(sweeprolog-document-predicate-at-point): refactor.

Avoid excessive analysis in presence of unbalanced quotes

* sweeprolog.el (sweeprolog-analyze-fragment-fullstop): new function,
adds a dedicated text property to fullstops.
(sweeprolog-analyze-region-fragment-hook): add it.
(sweeprolog-at-fullstop-p)
(sweeprolog-end-of-last-fullstop, sweeprolog-end-of-next-fullstop):
new functions.
(sweeprolog-end-of-top-term): use them for restricting to region
between last fullstop and next fullstop.

Fix some typos in the manual section about holes

Announce recent changes in NEWS.org and bump version to 0.10.0

ADDED: New command sweeprolog-insert-term-with-holes

* sweep.pl (sweep_format_term/2, sweep_current_functors/2): new
predicates.
* sweeprolog.el (sweeprolog-read-functor-history): new variable,
history list for...
(sweeprolog-read-functor): new function.
(sweeprolog-forward-hole-repeat-mode): rename to...
(sweeprolog-forward-hole-repeat-map): corrected name for keymap.
(sweeprolog-analyze-end-font-lock): don't rely on
sweeprolog--next-hole to move point.
(sweeprolog-at-hole-p, sweeprolog-beginning-of-hole)
(sweeprolog-end-of-hole): new functions, used by...
(sweeprolog--previous-hole, sweeprolog--next-hole): revise.
(sweeprolog--precedence-at-point): new function, used by...
(sweeprolog-insert-term-with-holes): new command.
(sweeprolog-mode-map): bind it to C-c C-m
* sweeprolog-tests: test it.
* README.org ("Filling Holes"): move to top and rename to...
("Holes"): document sweeprolog-insert-term-with-holes.

ENHANCED: use variable names from docs when inserting next clause

* sweep.pl (sweep_format_head/2): new predicate.
* sweeprolog.el (sweeprolog-insert-clause): use it.

Improve sweeprolog-menu entry names

* sweeprolog.el (sweeprolog-info-manual): new function.
(sweeprolog-menu): add it, improve entry names.

ENHANCED: highlight holes in incomplete terms

* sweeprolog.el (sweeprolog-predicate-completion-at-point): fontify
holes when inserting them.
(sweeprolog-analyze-start-font-lock): reset font-lock-face in analyzed
region.
(sweeprolog-analyze-fragment-to-faces): fix syntax error handling,
don't highlight holes as it is done by...
(sweeprolog-analyze-end-font-lock): new function, highlights holes in
analyzed region when sweeprolog-highlight-holes is non-nil.
(sweeprolog-analyze-region-end-hook): add it.
(sweeprolog--hole): fix text property used for setting stickiness.

FIXED: possible crash after calling sweeprolog-restart

* (sweeprolog-menu): add entry for sweeprolog-infer-indent-style

Duplicate LaTeX label.

Announce recent changes in NEW.org and bump version to 0.9.6

* README.org: refine a couple of ALT_TITLEs

Add short titles to all manual nodes to act as menu items

ADDED: new command sweeprolog-infer-indent-style

* sweeprolog.el (sweeprolog-infer-indent-style): new command.
* sweeprolog-tests.el: test it.
* README.org ("Indentation"): mention it.

Use indent-to instead manually indenting with spaces

* sweeprolog.el (sweeprolog-indent-line): use indent-to.
(sweeprolog-indent-offset): tweak docstring.
(sweeprolog-indent-line-after-prefix): use it instead of hard-coded
offset.
(sweeprolog-export-predicate): don't override indent-tabs-mode.

* (sweeprolog-indent-or-forward-hole): simplify

Announce recent changes in NEW.org and bump version to 0.9.5

* (sweeprolog-mode): enable comment-multi-line

* (sweeprolog-mode): Improve interaction with auto-fill-mode

* (sweeprolog-beginning-of-predicate-at-point): fix hang near bob

* (sweeprolog-align-spaces): extend to also work in comments

FIXED: stale predicate locations in loaded modified buffers

* sweep.pl (sweep_predicate_location_/2,3): prefer xref over loaded
predicate properties.
* sweeprolog.el (sweeprolog-predicate-location): first analyze buffer
if modified to update xref data.

Announce recent changes in NEWS.org and bump version to 0.9.4

Use built-in file_autoload_directives/3 to update deps

* sweep.pl (sweep_file_missing_dependencies/2): new predicate.
* sweeprolog.el (sweeprolog-update-dependencies): use it.
* sweeprolog-tests.el: add another test case for
sweeprolog-update-dependencies.

* README.org ("Filling Holes"): improve indexing

* (sweeprolog--ensure-module): detect and report missing sweep.pl

ADDED: ability to pass command line args directly to swipl

* sweeprolog.el (sweeprolog-handle-command-line-args): new function,
sets up command line argument handling using...
(sweeprolog-command-line-function): new function.

ADDED: minor mode for moving to the next hole with TAB

* sweeprolog.el (sweeprolog-forward-hole-on-tab-mode): new minor mode,
binding TAB to...
(sweeprolog-indent-or-forward-hole): new command.
* README.org ("Filling Holes"): rephrase and mention new minor mode.

ENHANCED: indentation after infix operators

* sweeprolog.el (sweeprolog-indent-line-after-infix): adhere to last line
indentation even if non-standard, handle DCG RHS contexts and SSU
guards.
* sweeprolog-tests.el: add more tests for indentation.

* (sweeprolog-identifier-at-point): reliably qualify local heads

Announce recent changes in NEWS.org and bump version to 0.9.3

Add test for predicate completion with named arguments

ENHANCED: use argument names for holes in predicate completion

* sweep.pl (predicate_argument_names/2): new predicate.
(sweep_format_predicate/2): use it, and revise into...
(sweep_format_predicate/4): new predicate.
(sweep_predicate_completion_candidates): use it.

* (sweeprolog-analyze-fragment-flymake): fix typo

Add repeat keymap for sweeprolog-forward-hole

* sweeprolog.el (sweeprolog-backward-hole): new command.
(sweeprolog-forward-hole-repeat-mode): new repeat keymap.

* README.org ("Things To Do"): remove outdated item

Announce recent changes in NEWS.org and bump version to 0.9.2

ADDED: make flymake optionally complain about implicit autoloads

* sweeprolog.el (sweeprolog-note-implicit-autoloads): new user-option.
(sweeprolog-analyze-fragment-flymake): use it.
* README.org ("Managing Dependencies"): mention it.

* README.org: ("Managing Dependencies"): new section.

ADDED: new command for updating use_module/autoload directives

* sweep.pl (sweep_file_path_in_library/2): new predicate.
(sweep_color_normalized/3): normalize autoload source paths.
* sweeprolog.el (sweeprolog-analyze-buffer-with): new helper function.
(sweeprolog-update-dependencies): new command.

Announce recent changes in NEWS.org and bump version to 0.9.1

Adjust arity of predicates according to completion context

* sweep.pl (sweep_context_callable): track required arity adjustment.
(sweep_predicate_completion_candidates): take arity difference as
argument, adjust and filter candidates according to it.
* sweeprolog.el (sweeprolog-predicate-completion-at-point): use it.
* sweeprolog-tests.el: test it.

Recognize and highlight XPCE string comments as docstrings

* sweeprolog.el (sweeprolog-analyze-fragment-to-faces): recognize
string comments.

Recognize and highlight built-in predicate definitions

* sweeprolog.el (sweeprolog-analyze-fragment-to-faces): recognize
"def_swi" and "def_iso" predicate head kinds .

Do not highlight other occurrences of anonymous variables

* sweeprolog.el (sweeprolog-analyze-fragment-variable): check for
anonymous variables ("_").

Fix typos in README.org

Announce recent changes in NEWS.org and bump version to 0.9.0

ADDED: PlUnit tests block skeleton and command for inserting it

* sweeprolog.el (sweeprolog-format-string-as-atom): new function.
(sweeprolog-module-header-skeleton): use define-skeleton, making it a
command instead of a defconst.
(sweeprolog-plunit-testset-skeleton): new skeleton and command.
* sweeprolog-tests: test it.
* README.org ("Writing Tests"): new section.
("Using templates for creating new modules"): rename to "Creating New
Modules".

* (sweeprolog-beginning-of-next-top-term): revise and add tests

Bump version to 0.8.13 (bug fix release)

FIXED: instantiation error in color term normalization

Announce recent changes in NEWS.org and bump version to 0.8.12

New user-option to controlling highlighting of holes

* sweeprolog.el (sweeprolog-highlight-holes): new user-option.
(sweeprolog-analyze-fragment-to-faces): respect it.

Handle module-qualification in next-clause insertion

* sweeprolog.el (sweeprolog-definition-at-point): also return module
name when the head term is qualified.
(sweeprolog-maybe-insert-next-clause): pass module name to...
(sweeprolog-insert-clause): new argument module.
* sweeprolog-tests.el: add a couple of relevant test cases.

* (sweeprolog-hole-face): new face for highlighting holes

FIXED: sweeprolog-beginning-of-next-top-term: other possible loop

* sweeprolog.el (sweeprolog-beginning-of-next-top-term): don't loop
when called in the last term of the buffer
* sweeprolog-tests.el (beginning-of-next-top-term-at-last-clause): new
test case

* (sweeprolog-top-level-mode-map): bind sweeprolog-forward-hole