From 74e64f292417228c99d0c775defba999281e2afd Mon Sep 17 00:00:00 2001
From: =?utf8?q?Jan=20Kundr=C3=A1t?= <jkt@kde.org>
Date: Mon, 6 Nov 2017 22:03:34 +0100
Subject: [PATCH] Add optional support for spell checking

This is based on some old code that I wrote in May 2014 (!) and which
was subsequently fixed and cleaned up by Martin. I should have picked
these pieces much, much sooner...

Relevant git commits: 00ab5e33, c051a4d9

Co-Authored-By: Martin T. H. Sandsmark <martin.sandsmark@kde.org>
Change-Id: I94ecdbcea15268418e332496fd2febb752d39bf6
---
 CMakeLists.txt               | 11 +++++++++++
 src/Gui/ComposerTextEdit.cpp | 10 ++++++++++
 src/configure.cmake.in       |  1 +
 3 files changed, 22 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index cc306415..3ec6e409 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -53,6 +53,7 @@ trojita_option(BUILD_TESTING "Build tests" ON)
 trojita_option(WITH_MIMETIC "Build with client-side MIME parsing" AUTO)
 trojita_option(WITH_GPGMEPP "Use GpgME's native C++ bindings" AUTO)
 trojita_option(WITH_KF5_GPGMEPP "Use legacy discontinued GpgME++ library from KDE frameworks" AUTO)
+trojita_option(WITH_SPELLCHECKER_SONNET "Build with spellchecker through KDE's Sonnet" AUTO "WITH_DESKTOP")
 
 if(WIN32)
     trojita_option(WITH_NSIS "Build Windows NSIS installer" AUTO "WITH_DESKTOP")
@@ -226,6 +227,13 @@ else()
     message(STATUS "Disabling COMPRESS=DEFLATE, zlib is not available")
 endif()
 
+trojita_find_package(KF5Sonnet "" "https://projects.kde.org/projects/frameworks/sonnet" "Qt5 Spell Checking Library from KDE" "Spell checking support" WITH_SPELLCHECKER_SONNET)
+if(WITH_SPELLCHECKER_SONNET)
+    set(TROJITA_HAVE_SONNET True)
+else()
+    set(TROJITA_HAVE_SONNET False)
+endif()
+
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/src/configure.cmake.in
     ${CMAKE_CURRENT_BINARY_DIR}/configure.cmake.h)
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/src/configure-plugins.cmake.in
@@ -731,6 +739,9 @@ if(WITH_DESKTOP)
     # The ${path_DesktopGui} is needed so that the generated ui_*.h file can find the headers of the custom widgets
     set_property(TARGET DesktopGui APPEND PROPERTY INCLUDE_DIRECTORIES ${path_DesktopGui})
     target_link_libraries(DesktopGui Common UiUtils Composer Cryptography Imap IPC MSA Plugins Streams qwwsmtpclient Qt5::WebKitWidgets)
+    if(WITH_SPELLCHECKER_SONNET)
+        target_link_libraries(DesktopGui KF5::SonnetUi)
+    endif()
 
     # On Windows build a real Win32 GUI application without console window
     # On other platforms WIN32 flag is ignored
diff --git a/src/Gui/ComposerTextEdit.cpp b/src/Gui/ComposerTextEdit.cpp
index ada0524d..2d417575 100644
--- a/src/Gui/ComposerTextEdit.cpp
+++ b/src/Gui/ComposerTextEdit.cpp
@@ -31,6 +31,11 @@
 #include <QPaintEvent>
 #include <QTimer>
 #include <QUrl>
+#include "configure.cmake.h"
+#ifdef TROJITA_HAVE_SONNET
+#include <SonnetUi/sonnet/spellcheckdecorator.h>
+#include <SonnetUi/sonnet/highlighter.h>
+#endif
 
 #include "Gui/Util.h"
 #include "UiUtils/Color.h"
@@ -54,6 +59,11 @@ ComposerTextEdit::ComposerTextEdit(QWidget *parent) : QTextEdit(parent)
 
     m_pasteQuoted = new QAction(tr("Paste as Quoted Text"), this);
     connect(m_pasteQuoted, &QAction::triggered, this, &ComposerTextEdit::slotPasteAsQuotation);
+
+#ifdef TROJITA_HAVE_SONNET
+    Sonnet::SpellCheckDecorator *decorator = new Sonnet::SpellCheckDecorator(this);
+    decorator->highlighter()->setAutomatic(false);
+#endif
 }
 
 void ComposerTextEdit::notify(const QString &n, uint timeout)
diff --git a/src/configure.cmake.in b/src/configure.cmake.in
index 702126d5..b7167ab7 100644
--- a/src/configure.cmake.in
+++ b/src/configure.cmake.in
@@ -4,3 +4,4 @@
 #cmakedefine TROJITA_HAVE_MIMETIC
 #cmakedefine TROJITA_HAVE_GPGMEPP
 #cmakedefine TROJITA_HAVE_CRYPTO_MESSAGES
+#cmakedefine TROJITA_HAVE_SONNET
-- 
2.11.4.GIT