Merge pull request #35 from ajalexei/master

Added syntax highlighting for BibTeX files, PDF preview for LaTeX files, compilation of LaTeX files into PDF

4 files changed, 114 insertions, 0 deletions

diff --git a/README.md b/README.md
index 48f9796..114f114 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,7 @@ Plugin | Description
 *[`indentguide`](plugins/indentguide.lua?raw=1)* | Adds indent guides *([screenshot](https://user-images.githubusercontent.com/3920290/79640716-f9860000-818a-11ea-9c3b-26d10dd0e0c0.png))*
 [`language_angelscript`](plugins/language_angelscript.lua?raw=1) | Syntax for the [Angelscript](https://www.angelcode.com/angelscript/) programming language
 [`language_batch`](plugins/language_batch.lua?raw=1) | Syntax for Windows [Batch Files](https://en.wikipedia.org/wiki/Batch_file)
+[`language_bib`](plugins/language_bib.lua?raw=1) | Syntax for [BibTex](https://en.wikipedia.org/wiki/BibTeX) files
 [`language_cmake`](plugins/language_cmake.lua?raw=1) | Syntax for the CMake build system language
 [`language_cpp`](plugins/language_cpp.lua?raw=1) | Syntax for the [C++](https://isocpp.org/) programming language
 [`language_csharp`](plugins/language_csharp.lua?raw=1) | Syntax for the [C#](http://csharp.net) programming language
@@ -98,6 +99,7 @@ Plugin | Description
 [`openfilelocation`](plugins/openfilelocation.lua?raw=1) | Opens the parent directory of the current file in the file manager
 [`openselected`](plugins/openselected.lua?raw=1) | Opens the selected filename or url
 ~~[`projectmanager`](plugins/projectmanager.lua?raw=1)~~ | Integrated in lite-xl with improvements ~~Save projects and load/reload them quickly~~
+[`pdfview`](plugins/pdfview.lua?raw=1) | PDF preview for TeX files
 [`rainbowparen`](plugins/rainbowparen.lua?raw=1) | Show nesting of parentheses with rainbow colours
 [`restoretabs`](plugins/restoretabs.lua?raw=1) | Keep a list of recently closed tabs, and restore the tab in order on cntrl+shift+t.
 [`regexreplaceplugin`](plugins/regexreplaceplugin.lua?raw=1) | Allows for you to write a regex and its replacement in one go, and live preview the results.
@@ -107,6 +109,7 @@ Plugin | Description
 [`sort`](plugins/sort.lua?raw=1) | Sorts selected lines alphabetically
 [`spellcheck`](plugins/spellcheck.lua?raw=1) | Underlines misspelt words *([screenshot](https://user-images.githubusercontent.com/3920290/79923973-9caa7400-842e-11ea-85d4-7a196a91ca50.png))* *— note: on Windows a [`words.txt`](https://github.com/dwyl/english-words/blob/master/words.txt) dictionary file must be placed beside the exe*
 [`tabnumbers`](plugins/tabnumbers.lua?raw=1) | Displays tab numbers from 1–9 next to their names *([screenshot](https://user-images.githubusercontent.com/16415678/101285362-007a8500-37e5-11eb-869b-c10eb9d9d902.png))
+[`texcompile`](plugins/texcompile.lua?raw=1) | Compile Tex files into PDF
 [`theme16`](https://github.com/monolifed/theme16)* | Theme manager with base16 themes
 [`themescheduler`](https://github.com/BenStigsen/lite-config/blob/main/plugins/themescheduler.lua?raw=1) | Schedule themes to be used at certain times
 [`themeselect`](plugins/themeselect.lua?raw=1) | Select a theme based on filename of active document
diff --git a/plugins/language_bib.lua b/plugins/language_bib.lua
new file mode 100644
index 0000000..08a5662
--- /dev/null
+++ b/plugins/language_bib.lua
@@ -0,0 +1,22 @@
+-- mod-version:1 -- lite-xl 1.16
+local syntax = require "core.syntax"
+
+syntax.add {
+  files = { "%.bib$" },
+  comment = "%%",
+  patterns = {
+    { pattern = {"%%", "\n"},     type = "comment"   },
+    { pattern = "@%a+",           type = "keyword"   },
+    { pattern = "%a+%s=",         type = "keyword2"  },
+  },
+  symbols = {
+    ["author"] = "keyword",
+    ["doi"] = "keyword",
+    ["issue"] = "keyword",
+    ["journal"] = "keyword",
+    ["month"] = "keyword",
+    ["numpages"] = "keyword",
+    ["pages"] = "keyword",
+    ["publisher"] = "keyword",
+  }
+}
diff --git a/plugins/pdfview.lua b/plugins/pdfview.lua
new file mode 100644
index 0000000..41e8ad0
--- /dev/null
+++ b/plugins/pdfview.lua
@@ -0,0 +1,45 @@
+-- mod-version:1 -- lite-xl 1.16
+local core = require "core"
+local command = require "core.command"
+local keymap = require "core.keymap"
+
+command.add("core.docview", {
+  ["pdfview:show-preview"] = function()
+    local av = core.active_view
+
+-- User's home directory
+    local homedir = ""
+
+    if PLATFORM == "Windows" then
+        homedir = os.getenv("USERPROFILE")
+    else
+        homedir = os.getenv("HOME")
+    end
+
+-- The current (La)TeX file
+    local texfile = av:get_filename()
+    texfile = string.gsub(texfile, '~', homedir)
+-- Construct the PDF file name out of the (La)Tex filename
+    local pdffile = string.gsub(texfile, ".tex", ".pdf")
+-- PDF viewer - is there any provided by the environment
+    local pdfcmd = os.getenv("LITE_PDF_VIEWER")
+
+    core.log("Opening pdf preview for \"%s\"", texfile)
+
+    if pdfcmd ~= nil then
+        system.exec(pdfcmd .. " " .. pdffile)
+    elseif PLATFORM == "Windows" then
+        system.exec("start " .. pdffile)
+    else
+        system.exec(string.format("xdg-open %q", pdffile))
+    end
+
+--    core.add_thread(function()
+--      coroutine.yield(5)
+--      os.remove(htmlfile)
+--    end)
+  end
+})
+
+
+keymap.add { ["ctrl+shift+v"] = "pdfview:show-preview" }
diff --git a/plugins/texcompile.lua b/plugins/texcompile.lua
new file mode 100644
index 0000000..7a5fd6e
--- /dev/null
+++ b/plugins/texcompile.lua
@@ -0,0 +1,44 @@
+-- mod-version:1 -- lite-xl 1.16
+local core = require "core"
+local command = require "core.command"
+local keymap = require "core.keymap"
+
+command.add("core.docview", {
+  ["texcompile:tex-compile"] = function()
+    local av = core.active_view
+
+-- User's home directory
+    local homedir = ""
+
+    if PLATFORM == "Windows" then
+        homedir = os.getenv("USERPROFILE")
+    else
+        homedir = os.getenv("HOME")
+    end
+
+-- The current (La)TeX file and path
+    local texname = av:get_name()
+    local texpath = av:get_filename()
+    texpath = string.gsub(texpath, '~', homedir)
+    texpath = string.gsub(texpath, texname, '')
+
+-- LaTeX compiler - is there any provided by the environment
+    local texcmd = os.getenv("LITE_LATEX_COMPILER")
+
+    if texcmd == nil then
+        core.log("No LaTeX compiler found")
+    else
+        core.log("LaTeX compiler is %s, compiling %s", texcmd, texname)
+
+        system.exec(string.format("cd %q && %q %q", texpath, texcmd, texname))
+    end
+
+--    core.add_thread(function()
+--      coroutine.yield(5)
+--      os.remove(htmlfile)
+--    end)
+  end
+})
+
+
+keymap.add { ["ctrl+shift+t"] = "texcompile:tex-compile" }