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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/Main.hs b/Main.hs new file mode 100644 --- /dev/null +++ b/Main.hs @@ -0,0 +1,134 @@ +module Main where + + import Graphics.UI.Gtk (AttrOp((:=))) + import qualified Graphics.UI.Gtk as G + import qualified Graphics.UI.Gtk.WebKit.WebView as GW + + import Control.Monad (void, forever, when) + import Control.Concurrent (forkIO, threadDelay) + import Control.Concurrent.MVar + import Data.Maybe (isJust, fromJust) + + import Text.Pandoc + import System.Directory (getTemporaryDirectory, getModificationTime) + import System.IO.Temp (openTempFile) + import GHC.IO.Handle (hPutStr, hFlush) + import Control.Monad.Trans (lift) + import Control.Monad.Trans.Maybe + + import Paths_markup_preview + + import Debug.Trace + + + generateHtml format contents = writeHtmlString def intermediaryDocument where + intermediaryDocument = + let reader = fromJust $ lookup format [("Markdown", readMarkdown), ("reStructuredText", readRST), ("Textile", readTextile)] + in reader (def { readerStandalone = True }) contents + + + createFilter name filepatterns = do + fileFilter <- G.fileFilterNew + mapM_ (G.fileFilterAddPattern fileFilter) filepatterns + G.fileFilterSetName fileFilter name + return fileFilter + + + createOpenDialog = do + dialog <- G.fileChooserDialogNew + (Just "Choose a markup file") + Nothing + G.FileChooserActionOpen + [("Ok", G.ResponseAccept), ("Cancel", G.ResponseCancel)] + createFilter "Markdown" ["*.md", "*.markdown"] >>= G.fileChooserAddFilter dialog + createFilter "reStructuredText" ["*.rst", "*.rest", "*.restx"] >>= G.fileChooserAddFilter dialog + createFilter "Textile" ["*.textile"] >>= G.fileChooserAddFilter dialog + + return dialog + + + createToolbar loadNotifier = do + toolbar <- G.toolbarNew + G.toolbarSetStyle toolbar G.ToolbarIcons + openButton <- G.toolButtonNewFromStock "gtk-open" + void $ G.onToolButtonClicked openButton $ do + openDialog <- createOpenDialog + dialogResponse <- G.dialogRun openDialog + when (dialogResponse == G.ResponseAccept) $ do + response <- runMaybeT $ do + filepath <- MaybeT $ G.fileChooserGetFilename openDialog + fileFilter <- MaybeT $ G.fileChooserGetFilter openDialog + format <- lift $ G.fileFilterGetName fileFilter + return (format, filepath) + when (isJust response) $ putMVar loadNotifier (fromJust response) + G.widgetDestroy openDialog + + G.toolbarInsert toolbar openButton 0 + + return toolbar + + + createInterface loadNotifier = do + window <- G.windowNew + scrolledWindow <- G.scrolledWindowNew Nothing Nothing + webView <- GW.webViewNew + G.set scrolledWindow [ G.containerChild := webView ] + statusBar <- G.statusbarNew + toolBar <- createToolbar loadNotifier + + singleColumn <- G.vBoxNew False 1 + G.boxPackStart singleColumn toolBar G.PackNatural 0 + G.boxPackStart singleColumn scrolledWindow G.PackGrow 0 + G.boxPackEnd singleColumn statusBar G.PackNatural 0 + + G.set window [ G.containerChild := singleColumn + , G.windowDefaultWidth := 600 + , G.windowDefaultHeight := 600 + , G.containerBorderWidth := 1 + ] + return (window, webView) + + + withGUI f = do + void G.initGUI + window <- f + G.onDestroy window G.mainQuit + G.widgetShowAll window + G.mainGUI + + + loadHtmlInView webView htmlContent = do + tempDirectory <- getTemporaryDirectory + layout <- getDataFileName "Resources/layout.html" >>= \filepath -> readFile filepath + let htmlContent' = renderTemplate [("htmlContent", htmlContent)] layout + (tempFilePath, tempHandle) <- openTempFile tempDirectory "markup-preview.html" + hPutStr tempHandle htmlContent' >> hFlush tempHandle + GW.webViewLoadUri webView ("file://" ++ tempFilePath) + + + loaderReloader webView loadNotifier Nothing Nothing = do + threadDelay 500 + (format, filepath) <- takeMVar loadNotifier + modificationTime <- getModificationTime filepath + contents <- readFile filepath + loadHtmlInView webView $ generateHtml format contents + loaderReloader webView loadNotifier (Just (format, filepath)) (Just modificationTime) + + loaderReloader webView loadNotifier (Just (format, filepath)) (Just modificationTime) = do + threadDelay 500 + noNewFile <- isEmptyMVar loadNotifier + if noNewFile + then do modificationTime' <- getModificationTime filepath + when (modificationTime' /= modificationTime) $ do + contents <- readFile filepath + loadHtmlInView webView $ generateHtml format contents + loaderReloader webView loadNotifier (Just (format, filepath)) (Just modificationTime') + else loaderReloader webView loadNotifier Nothing Nothing + + + main :: IO () + main = withGUI $ do + loadNotifier <- newEmptyMVar :: IO (MVar (String, String)) + (window, webView) <- createInterface loadNotifier + forkIO $ loaderReloader webView loadNotifier Nothing Nothing + return window diff --git a/Resources/layout.html b/Resources/layout.html new file mode 100644 --- /dev/null +++ b/Resources/layout.html @@ -0,0 +1,396 @@ + + + + + +$htmlContent$ + + diff --git a/Setup.hs b/Setup.hs new file mode 100644 --- /dev/null +++ b/Setup.hs @@ -0,0 +1,2 @@ +import Distribution.Simple +main = defaultMain diff --git a/markup-preview.cabal b/markup-preview.cabal new file mode 100644 --- /dev/null +++ b/markup-preview.cabal @@ -0,0 +1,28 @@ +-- Initial markup-preview.cabal generated by cabal init. For further +-- documentation, see http://haskell.org/cabal/users-guide/ + +name: markup-preview +version: 0.1.0.0 +synopsis: A simple markup document preview (markdown, textile, reStructuredText) +description: A GUI application that renders the markup documents (markdown, textile, reStructuredText) into + HTML and presents them into a web view. It also reloads the content automatically when the source + file changes. +license: OtherLicense +license-file: LICENSE +author: Marius Ghita +maintainer: mhitza@gmail.com +-- copyright: +category: Text +build-type: Simple +cabal-version: >=1.8 +data-files: Resources/layout.html + +source-repository head + type: git + location: https://github.com/mhitza/markup-preview + +executable markup-preview + main-is: Main.hs + ghc-options: -threaded + other-modules: Paths_markup_preview + build-depends: base == 4.*, gtk, webkit, pandoc, directory, temporary, transformers, mtl