From bb04215684ff14da69591751f154d7739b9a69d7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karl=20Yngve=20Lerv=C3=A5g?= <karl.yngve+git@gmail.com>
Date: Mon, 4 Jan 2016 13:05:25 +0100
Subject: [PATCH] Simple version of includegraphics complete (#308)

---
 README.md                    |  2 +-
 autoload/vimtex/complete.vim | 35 ++++++++++++++++++----
 doc/vimtex.txt               | 56 +++++++++++++++++++-----------------
 3 files changed, 61 insertions(+), 32 deletions(-)

diff --git a/README.md b/README.md
index d68ba1b..5b1b802 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ disabled if desired.
   - [qpdfview](https://launchpad.net/qpdfview)
   - [SumatraPDF](http://www.sumatrapdfreader.org/free-pdf-reader.html)
   - Other viewers are supported through a general interface
-- Completion of citations and labels
+- Completion of citations, labels, and file names for figures
 - Document navigation through
   - table of content
   - table of labels
diff --git a/autoload/vimtex/complete.vim b/autoload/vimtex/complete.vim
index 95047e2..3cac221 100644
--- a/autoload/vimtex/complete.vim
+++ b/autoload/vimtex/complete.vim
@@ -16,7 +16,7 @@ endfunction
 function! vimtex#complete#init_script() " {{{1
   if !g:vimtex_complete_enabled | return | endif
 
-  let s:completers = [s:bib, s:ref]
+  let s:completers = [s:bib, s:ref, s:img]
 endfunction
 
 " }}}1
@@ -67,7 +67,7 @@ endfunction
 " {{{1 Bibtex completion
 
 let s:bib = {
-      \ 'pattern' : '\\\a*cite\a*\*\?\(\[[^\]]*\]\)*\_\s*{[^{}]*',
+      \ 'pattern' : '\v\\\a*cite\a*%(\s*\[[^]]*\])?\s*\{[^{}]*',
       \ 'enabled' : 1,
       \ 'bibs' : '''\v%(%(\\@<!%(\\\\)*)@<=\%.*)@<!'
       \          . '\\(bibliography|add(bibresource|globalbib|sectionbib))'
@@ -229,7 +229,7 @@ endfunction
 " {{{1 Label completion
 
 let s:ref = {
-      \ 'pattern' : '\\v\?\(auto\|eq\|page\|[cC]\|labelc\)\?ref\*\?\_\s*{[^{}]*',
+      \ 'pattern' : '\v\\v?%(auto|eq|page|[cC]|labelc)?ref\s*\{[^{}]*',
       \ 'enabled' : 1,
       \}
 
@@ -257,8 +257,8 @@ function! s:ref.complete(regex) dict " {{{2
   let suggestions = []
   for m in matches
     let entry = {
-          \ 'word': m[0],
-          \ 'menu': printf('%7s [p. %s]', '('.m[1].')', m[2])
+          \ 'word' : m[0],
+          \ 'menu' : printf('%7s [p. %s]', '('.m[1].')', m[2])
           \ }
     if g:vimtex_complete_close_braces && !s:next_chars_match('^\s*[,}]')
       let entry = copy(entry)
@@ -319,6 +319,31 @@ function! s:ref.parse_number(num_tree) dict " {{{2
   endif
 endfunction
 
+" }}}1
+" {{{1 Image filename completion
+
+let s:img = {
+      \ 'pattern' : '\v\\includegraphics%(\s*\[[^]]*\])?\s*\{[^{}]*',
+      \ 'enabled' : 1,
+      \}
+
+function! s:img.complete(regex) dict " {{{2
+  let l:candidates = []
+  for l:ext in ['png', 'eps', 'pdf', 'jpg']
+    let l:candidates += globpath(b:vimtex.root, '**/*.' . l:ext, 1, 1)
+  endfor
+
+  let l:output = b:vimtex.out()
+  call filter(l:candidates, 'v:val !=# l:output')
+  call map(l:candidates, 'strpart(v:val, len(b:vimtex.root)+1)')
+
+  if g:vimtex_complete_close_braces && !s:next_chars_match('^\s*[,}]')
+    call map(l:candidates, '{ ''abbr'' : v:val, ''word'' : v:val . ''}'' }')
+  endif
+
+  return l:candidates
+endfunction
+
 " }}}1
 
 "
diff --git a/doc/vimtex.txt b/doc/vimtex.txt
index fb36bbe..7562ca0 100644
--- a/doc/vimtex.txt
+++ b/doc/vimtex.txt
@@ -42,6 +42,7 @@ CONTENTS                                                      *vimtex-contents*
   Completion                                    |vimtex-completion|
     Complete labels                             |vimtex-complete-labels|
     Complete citations                          |vimtex-complete-cites|
+    Complete image file names                   |vimtex-complete-images|
     Autocomplete                                |vimtex-complete-auto|
       Neocomplete                               |vimtex-complete-neocomplete|
       YouCompleteMe                             |vimtex-complete-youcompleteme|
@@ -82,7 +83,7 @@ Feature overview~
   - `qpdfview`
   - `SumatraPDF`
   - Other viewers are supported through a general interface
-- Completion of citations and labels
+- Completion of citations, labels, and file names for figures
 - Document navigation through
   - table of content
   - table of labels
@@ -350,16 +351,6 @@ Options~
 
   Default value: 0
 
-*g:vimtex_complete_patterns*
-  Define patterns that control when the label and citation completion is
-  triggered.
-
-  Default value: >
-    let g:vimtex_complete_patterns = {
-      \ 'ref' : '\C\\v\?\(eq\|page\|[cC]\)\?ref\*\?\_\s*{[^{}]*',
-      \ 'bib' : '\C\\\a*cite\a*\*\?\(\[[^\]]*\]\)*\_\s*{[^{}]*',
-      \ })
-<
 *g:vimtex_change_complete_envs*
   Define a list of environments that will be completed when changing the
   surrounding environments (see |<plug>(vimtex-change-env)|).
@@ -1230,14 +1221,12 @@ If |g:vimtex_complete_enabled| is 1 (default), then |vimtex| sets the
 'omnifunc' to provide omni completion, see |compl-omni|.  Omni completion is
 then accessible with |i_CTRL-X_CTRL-O|.
 
-The omni completion completes both labels and citations.  If desired, one may
-set |g:vimtex_complete_close_braces|, which makes the completion include
-closing braces.
+The omni completion completes labels, citations, and file names for figures.
+If desired, one may set |g:vimtex_complete_close_braces|, which makes the
+completion include closing braces.
 
 Associated settings:
   |g:vimtex_complete_enabled|
-  |g:vimtex_complete_patterns.ref|
-  |g:vimtex_complete_patterns.bib|
   |g:vimtex_complete_close_braces|
   |g:vimtex_complete_recursive_bib|
 
@@ -1245,10 +1234,10 @@ Associated settings:
 Complete labels~
                                                        *vimtex-complete-labels*
 
-Label completion is triggered by '\ref{' commands as defined with
-|g:vimtex_complete_patterns.ref|.  The completion parses every relevant aux
-file to gather the completion candidates.  This is important, because it means
-that the completion only works when the LaTeX document has been compiled.
+Label completion is triggered by '\ref{' commands.  The completion parses every
+relevant aux file to gather the completion candidates.  This is important,
+because it means that the completion only works when the LaTeX document has
+been compiled.
 
 As an example: >
 
@@ -1268,10 +1257,9 @@ number.  The label completion matches:
 Complete citations~
                                                         *vimtex-complete-cites*
 
-Citation completion is triggered by '\cite{' commands as defined with
-|g:vimtex_complete_patterns.bib|.  The completion parses included bibliography
-files (`*.bib`) and `thebibliography` environments to gather the completion
-candidates.
+Citation completion is triggered by '\cite{' commands.  The completion parses
+included bibliography files (`*.bib`) and `thebibliography` environments to
+gather the completion candidates.
 
 As an example, assume that a bibliography file is included with the following
 entry: >
@@ -1291,6 +1279,18 @@ Then the bibliography key `knuth1981` will be completed with e.g.: >
 In particular, note that regular expressions (or vim patterns) can be used
 after '\cite{' to search for candidates.
 
+------------------------------------------------------------------------------
+Complete file names for figures~
+                                                       *vimtex-complete-images*
+
+File name completion for figures is triggered by '\includegraphic{' commands.
+
+As an example: >
+
+        \includegraphic{fig<CTRL-X><CTRL-O>
+
+offers a list of all matching file names.
+
 ------------------------------------------------------------------------------
 Autocomplete~
                                                          *vimtex-complete-auto*
@@ -1311,7 +1311,10 @@ documents with |neocomplete| and |vimtex|s omni completion function: >
     let g:neocomplete#sources#omni#input_patterns = {}
   endif
   let g:neocomplete#sources#omni#input_patterns.tex =
-        \ '\v\\\a*(ref|cite)\a*([^]]*\])?\{([^}]*,)*[^}]*'
+        \ '\v\\%('
+        \ . '\a*%(ref|cite)\a*%(\s*\[[^]]*\])?\s*\{[^{}]*'
+        \ . '|includegraphics%(\s*\[[^]]*\])?\s*\{[^{}]*'
+        \ . ')'
 <
 YouCompleteMe~
                                                 *vimtex-complete-youcompleteme*
@@ -1334,7 +1337,8 @@ To enable automatic completion with |youcompleteme|, use the following options:
     let g:ycm_semantic_triggers = {}
   endif
   let g:ycm_semantic_triggers.tex = [
-        \ 're!\\[A-Za-z]*(ref|cite)[A-Za-z]*([^]]*])?{([^}]*, ?)*'
+        \ 're!\\[A-Za-z]*(ref|cite)[A-Za-z]*([^]]*])?{([^}]*,?)*',
+        \ 're!\\includegraphics([^]]*])?{[^}]*'
         \ ]
 
 ==============================================================================