Use XCB and SelectSelectionInput instead of GTK+
As it happens, there is no real need to constantly poll for changes, since XFixes can inform us of updates as they happen. With GTK+ gone we've got dependencies and error handling under control. XCB is a truly awful thing to learn, though. Our method will never work on Wayland or Windows, so we don't miss out on anything by abandoning the huge toolkit.
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@ -74,19 +74,18 @@ else (USE_SYSTEM_TERMO)
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set (Termo_LIBRARIES termo-static)
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endif (USE_SYSTEM_TERMO)
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# We actually don't care about the specific version
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pkg_search_module (gtk gtk+-3.0 gtk+-2.0)
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option (WITH_GTK "Compile with GTK+ support" ${gtk_FOUND})
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pkg_check_modules (xcb xcb xcb-xfixes)
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option (WITH_X11 "Compile with X11 selection support using XCB" ${xcb_FOUND})
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if (WITH_GTK)
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if (NOT gtk_FOUND)
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message (FATAL_ERROR "GTK+ library not found")
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endif (NOT gtk_FOUND)
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if (WITH_X11)
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if (NOT xcb_FOUND)
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message (FATAL_ERROR "XCB not found")
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endif (NOT xcb_FOUND)
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list (APPEND dependencies_INCLUDE_DIRS ${gtk_INCLUDE_DIRS})
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list (APPEND dependencies_LIBRARY_DIRS ${gtk_LIBRARY_DIRS})
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list (APPEND dependencies_LIBRARIES ${gtk_LIBRARIES})
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endif (WITH_GTK)
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list (APPEND dependencies_INCLUDE_DIRS ${xcb_INCLUDE_DIRS})
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list (APPEND dependencies_LIBRARY_DIRS ${xcb_LIBRARY_DIRS})
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list (APPEND dependencies_LIBRARIES ${xcb_LIBRARIES})
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endif (WITH_X11)
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link_directories (${dependencies_LIBRARY_DIRS})
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include_directories (${ZLIB_INCLUDE_DIRS} ${icu_INCLUDE_DIRS}
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2
LICENSE
2
LICENSE
@ -1,4 +1,4 @@
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Copyright (c) 2013 - 2016, Přemysl Janouch <p@janouch.name>
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Copyright (c) 2013 - 2018, Přemysl Janouch <p@janouch.name>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted.
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@ -7,7 +7,7 @@ dictionary software of this kind, GUI or not, and thus decided to write my own.
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The project is covered by a permissive license, unlike vast majority of other
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similar projects, and can serve as a base for implementing other dictionary
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software. I wasn't able to reuse _anything_.
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software. I wasn't able to reuse _anything_ for StarDict.
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Further Development
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-------------------
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@ -32,12 +32,12 @@ Building and Running
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--------------------
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Build dependencies: CMake, pkg-config, xsltproc, docbook-xsl +
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Runtime dependencies: ncursesw, zlib, ICU, termo (included),
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glib-2.0, pango, gtk+ (optional, any version)
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glib-2.0, pango, xcb and xcb-xfixes (optional)
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$ git clone --recursive https://git.janouch.name/p/sdtui.git
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$ mkdir sdtui/build
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$ cd sdtui/build
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$ cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug -DWITH_GTK=ON
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$ cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug -DWITH_X11=ON
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$ make
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To install the application, you can do either the usual:
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@ -85,7 +85,7 @@ odd = 16 255
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The `watch-selection` option makes the application watch the X11 primary
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selection for changes and automatically search for selected text.
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This feature requires GTK+ and it will never work on Wayland by its design.
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This feature requires XCB and it will never work on Wayland by its design.
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You can also set up some dictionaries to be loaded at startup automatically:
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@ -8,7 +8,7 @@
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#define GETTEXT_PACKAGE PROJECT_NAME
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#define GETTEXT_DIRNAME "${CMAKE_INSTALL_PREFIX}/share/locale"
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#cmakedefine WITH_GTK
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#cmakedefine WITH_X11
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#cmakedefine HAVE_RESIZETERM
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#endif // ! CONFIG_H
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340
src/sdtui.c
340
src/sdtui.c
@ -1,7 +1,7 @@
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/*
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* StarDict terminal UI
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*
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* Copyright (c) 2013 - 2016, Přemysl Janouch <p@janouch.name>
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* Copyright (c) 2013 - 2018, Přemysl Janouch <p@janouch.name>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted.
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@ -43,10 +43,6 @@
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#include "stardict.h"
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#include "utils.h"
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#ifdef WITH_GTK
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#include <gtk/gtk.h>
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#endif // WITH_GTK
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#define CTRL_KEY(x) ((x) - 'A' + 1)
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#define TOP_BAR_CUTOFF 2 ///< How many lines are reserved on top
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@ -213,6 +209,7 @@ struct application
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guint center_search : 1; ///< Whether to center the search
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guint underline_last : 1; ///< Underline the last definition
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guint hl_prefix : 1; ///< Highlight the common prefix
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guint watch_x11_sel : 1; ///< Requested X11 selection watcher
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guint32 top_position; ///< Index of the topmost dict. entry
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guint top_offset; ///< Offset into the top entry
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@ -226,10 +223,6 @@ struct application
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gfloat division; ///< Position of the division column
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guint selection_timer; ///< Selection watcher timeout timer
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gint selection_interval; ///< Selection watcher timer interval
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gchar * selection_contents; ///< Selection contents
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struct attrs attrs[ATTRIBUTE_COUNT];
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};
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@ -398,18 +391,6 @@ app_reload_view (Application *self)
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g_object_unref (iterator);
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}
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#ifdef WITH_GTK
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static gboolean on_selection_timer (gpointer data);
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static void
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rearm_selection_watcher (Application *self)
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{
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if (self->selection_interval > 0)
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self->selection_timer = g_timeout_add
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(self->selection_interval, on_selection_timer, self);
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}
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#endif // WITH_GTK
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/// Load configuration for a color using a subset of git config colors.
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static void
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app_load_color (Application *self, GKeyFile *kf, const gchar *name, int id)
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@ -468,14 +449,8 @@ app_load_config_values (Application *self, GKeyFile *kf)
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app_load_bool (kf, "underline-last", self->underline_last);
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self->hl_prefix =
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app_load_bool (kf, "hl-common-prefix", self->hl_prefix);
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guint64 timer;
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const gchar *watch_selection = "watch-selection";
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if (app_load_bool (kf, watch_selection, FALSE))
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self->selection_interval = 500;
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else if ((timer = g_key_file_get_uint64
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(kf, "Settings", watch_selection, NULL)) && timer <= G_MAXINT)
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self->selection_interval = timer;
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self->watch_x11_sel =
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app_load_bool (kf, "watch-selection", self->watch_x11_sel);
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#define XX(name, config, fg_, bg_, attrs_) \
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app_load_color (self, kf, config, ATTRIBUTE_ ## name);
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@ -613,9 +588,6 @@ static void
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app_init (Application *self, char **filenames)
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{
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self->loop = NULL;
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self->selection_interval = -1;
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self->selection_timer = 0;
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self->selection_contents = NULL;
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self->tk = NULL;
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self->tk_timer = 0;
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@ -624,6 +596,7 @@ app_init (Application *self, char **filenames)
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self->center_search = TRUE;
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self->underline_last = TRUE;
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self->hl_prefix = TRUE;
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self->watch_x11_sel = FALSE;
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self->top_position = 0;
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self->top_offset = 0;
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@ -660,18 +633,7 @@ app_init (Application *self, char **filenames)
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exit (EXIT_FAILURE);
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}
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// Now we have settings for the clipboard watcher, we can arm the timer
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#ifdef WITH_GTK
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if (gtk_init_check (0, NULL))
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{
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// So that we set the input only when it actually changes
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GtkClipboard *clipboard = gtk_clipboard_get (GDK_SELECTION_PRIMARY);
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self->selection_contents = gtk_clipboard_wait_for_text (clipboard);
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rearm_selection_watcher (self);
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}
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else
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#endif // WITH_GTK
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self->loop = g_main_loop_new (NULL, FALSE);
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self->loop = g_main_loop_new (NULL, FALSE);
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// Dictionaries given on the command line override the configuration
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if (*filenames)
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@ -744,10 +706,6 @@ app_destroy (Application *self)
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if (self->tk_timer)
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g_source_remove (self->tk_timer);
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if (self->selection_timer)
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g_source_remove (self->selection_timer);
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g_free (self->selection_contents);
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g_ptr_array_free (self->entries, TRUE);
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g_free (self->search_label);
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g_array_free (self->input, TRUE);
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@ -760,24 +718,14 @@ app_destroy (Application *self)
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static void
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app_run (Application *self)
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{
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if (self->loop)
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g_main_loop_run (self->loop);
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#ifdef WITH_GTK
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else
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gtk_main ();
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#endif // WITH_GTK
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g_main_loop_run (self->loop);
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}
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/// Quit the main event dispatch loop.
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static void
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app_quit (Application *self)
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{
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if (self->loop)
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g_main_loop_quit (self->loop);
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#ifdef WITH_GTK
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else
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gtk_main_quit ();
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#endif // WITH_GTK
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g_main_loop_quit (self->loop);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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@ -1023,7 +971,7 @@ app_show_help (Application *self)
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{
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PROJECT_NAME " " PROJECT_VERSION,
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_("Terminal UI for StarDict dictionaries"),
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"Copyright (c) 2013 - 2016, Přemysl Janouch",
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"Copyright (c) 2013 - 2018, Přemysl Janouch",
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"",
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_("Type to search")
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};
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@ -1835,6 +1783,215 @@ install_winch_handler (void)
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sigaction (SIGWINCH, &act, &oldact);
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}
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// --- X11 selection watcher ---------------------------------------------------
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#ifdef WITH_X11
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#include <xcb/xcb.h>
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#include <xcb/xfixes.h>
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/// Data relating to one entry within the dictionary.
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typedef struct selection_watch SelectionWatch;
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struct selection_watch
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{
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Application *app;
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xcb_connection_t *X;
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const xcb_query_extension_reply_t *xfixes;
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guint watch; ///< X11 connection watcher
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xcb_window_t wid; ///< Withdrawn communications window
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xcb_atom_t atom_utf8_string; ///< UTF8_STRING
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xcb_timestamp_t in_progress; ///< Timestamp of last processed event
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};
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static gboolean
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is_xcb_ok (xcb_connection_t *X)
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{
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int xcb_error = xcb_connection_has_error (X);
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if (xcb_error)
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{
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g_warning (_("X11 connection failed (error code %d)"), xcb_error);
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return FALSE;
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}
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return TRUE;
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}
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static xcb_atom_t
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resolve_atom (xcb_connection_t *X, const char *atom)
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{
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xcb_intern_atom_reply_t *iar = xcb_intern_atom_reply (X,
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xcb_intern_atom (X, false, strlen (atom), atom), NULL);
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xcb_atom_t result = iar ? iar->atom : XCB_NONE;
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free (iar);
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return result;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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static void
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app_set_input (Application *self, const gchar *text, gsize text_len);
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static void
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on_selection_text_received (SelectionWatch *self, const gchar *text);
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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static gboolean
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read_utf8_property (SelectionWatch *self, xcb_window_t wid, xcb_atom_t property,
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GString *buf)
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{
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guint32 offset = 0;
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gboolean loop = TRUE, ok = TRUE;
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while (ok && loop)
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{
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xcb_get_property_reply_t *gpr = xcb_get_property_reply (self->X,
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xcb_get_property (self->X, FALSE /* delete */, wid,
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property, XCB_GET_PROPERTY_TYPE_ANY, offset, 0x7fff), NULL);
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if (!gpr || gpr->type != self->atom_utf8_string || gpr->format != 8)
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ok = FALSE;
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else
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{
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int len = xcb_get_property_value_length (gpr);
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g_string_append_len (buf, xcb_get_property_value (gpr), len);
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offset += len >> 2;
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loop = gpr->bytes_after > 0;
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}
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free (gpr);
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}
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return ok;
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}
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static void
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process_x11_event (SelectionWatch *self, xcb_generic_event_t *event)
|
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{
|
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xcb_generic_error_t *err = NULL;
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int event_code = event->response_type & 0x7f;
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if (event_code == 0)
|
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{
|
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err = (xcb_generic_error_t *) event;
|
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g_warning (_("X11 request error (%d, major %d, minor %d)"),
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err->error_code, err->major_code, err->minor_code);
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}
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else if (event_code ==
|
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self->xfixes->first_event + XCB_XFIXES_SELECTION_NOTIFY)
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{
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xcb_xfixes_selection_notify_event_t *e =
|
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(xcb_xfixes_selection_notify_event_t *) event;
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|
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// Not checking whether we should give up when this interrupts our
|
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// current retrieval attempt--the timeout solves this
|
||||
if (e->owner == XCB_NONE)
|
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return;
|
||||
|
||||
// Don't try to process two things at once. Each request gets a few
|
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// seconds to finish, then we move on, hoping that a property race
|
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// doesn't commence. Ideally we'd set up a separate queue for these
|
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// skipped requests and process them later.
|
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if (self->in_progress != 0 && e->timestamp - self->in_progress < 5000)
|
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return;
|
||||
|
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// ICCCM says we should ensure the named property doesn't exist
|
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(void) xcb_delete_property (self->X, self->wid, XCB_ATOM_PRIMARY);
|
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|
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(void) xcb_convert_selection (self->X, self->wid, e->selection,
|
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self->atom_utf8_string, XCB_ATOM_PRIMARY, e->timestamp);
|
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self->in_progress = e->timestamp;
|
||||
}
|
||||
else if (event_code == XCB_SELECTION_NOTIFY)
|
||||
{
|
||||
xcb_selection_notify_event_t *e =
|
||||
(xcb_selection_notify_event_t *) event;
|
||||
if (e->time != self->in_progress)
|
||||
return;
|
||||
|
||||
self->in_progress = 0;
|
||||
if (e->property == XCB_ATOM_NONE)
|
||||
return;
|
||||
|
||||
GString *buf = g_string_new (NULL);
|
||||
if (read_utf8_property (self, e->requestor, e->property, buf))
|
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on_selection_text_received (self, buf->str);
|
||||
g_string_free (buf, TRUE);
|
||||
|
||||
(void) xcb_delete_property (self->X, self->wid, e->property);
|
||||
}
|
||||
}
|
||||
|
||||
static gboolean
|
||||
process_x11 (G_GNUC_UNUSED GIOChannel *source,
|
||||
G_GNUC_UNUSED GIOCondition condition, gpointer data)
|
||||
{
|
||||
SelectionWatch *self = data;
|
||||
|
||||
xcb_generic_event_t *event;
|
||||
while ((event = xcb_poll_for_event (self->X)))
|
||||
{
|
||||
process_x11_event (self, event);
|
||||
free (event);
|
||||
}
|
||||
(void) xcb_flush (self->X);
|
||||
return is_xcb_ok (self->X);
|
||||
}
|
||||
|
||||
static void
|
||||
selection_watch_init (SelectionWatch *self, Application *app)
|
||||
{
|
||||
memset (self, 0, sizeof *self);
|
||||
if (!app->watch_x11_sel)
|
||||
return;
|
||||
self->app = app;
|
||||
|
||||
int which_screen = -1;
|
||||
self->X = xcb_connect (NULL, &which_screen);
|
||||
if (!is_xcb_ok (self->X))
|
||||
return;
|
||||
|
||||
// Most modern applications support this, though an XCB_ATOM_STRING
|
||||
// fallback might be good to add (COMPOUND_TEXT is complex)
|
||||
g_return_if_fail
|
||||
((self->atom_utf8_string = resolve_atom (self->X, "UTF8_STRING")));
|
||||
|
||||
self->xfixes = xcb_get_extension_data (self->X, &xcb_xfixes_id);
|
||||
g_return_if_fail (self->xfixes->present);
|
||||
|
||||
(void) xcb_xfixes_query_version_unchecked (self->X,
|
||||
XCB_XFIXES_MAJOR_VERSION, XCB_XFIXES_MINOR_VERSION);
|
||||
|
||||
const xcb_setup_t *setup = xcb_get_setup (self->X);
|
||||
xcb_screen_iterator_t setup_iter = xcb_setup_roots_iterator (setup);
|
||||
while (which_screen--)
|
||||
xcb_screen_next (&setup_iter);
|
||||
|
||||
xcb_screen_t *screen = setup_iter.data;
|
||||
self->wid = xcb_generate_id (self->X);
|
||||
(void) xcb_create_window (self->X, screen->root_depth, self->wid,
|
||||
screen->root, 0, 0, 1, 1, 0, XCB_WINDOW_CLASS_INPUT_OUTPUT,
|
||||
screen->root_visual, 0, NULL);
|
||||
|
||||
(void) xcb_xfixes_select_selection_input (self->X, self->wid,
|
||||
XCB_ATOM_PRIMARY, XCB_XFIXES_SELECTION_EVENT_MASK_SET_SELECTION_OWNER |
|
||||
XCB_XFIXES_SELECTION_EVENT_MASK_SELECTION_WINDOW_DESTROY |
|
||||
XCB_XFIXES_SELECTION_EVENT_MASK_SELECTION_CLIENT_CLOSE);
|
||||
|
||||
(void) xcb_flush (self->X);
|
||||
self->watch = g_io_add_watch (g_io_channel_unix_new
|
||||
(xcb_get_file_descriptor (self->X)), G_IO_IN, process_x11, self);
|
||||
}
|
||||
|
||||
static void
|
||||
selection_watch_destroy (SelectionWatch *self)
|
||||
{
|
||||
if (self->X)
|
||||
xcb_disconnect (self->X);
|
||||
if (self->watch)
|
||||
g_source_remove (self->watch);
|
||||
}
|
||||
|
||||
#endif // WITH_X11
|
||||
|
||||
// --- Initialisation, event handling ------------------------------------------
|
||||
|
||||
static gboolean on_stdin_input_timeout (gpointer data);
|
||||
@ -1903,7 +2060,7 @@ on_terminated (gpointer user_data)
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
#ifdef WITH_GTK
|
||||
#ifdef WITH_X11
|
||||
static void
|
||||
app_set_input (Application *self, const gchar *text, gsize text_len)
|
||||
{
|
||||
@ -1935,47 +2092,19 @@ app_set_input (Application *self, const gchar *text, gsize text_len)
|
||||
}
|
||||
|
||||
static void
|
||||
on_selection_text_received (G_GNUC_UNUSED GtkClipboard *clipboard,
|
||||
const gchar *text, gpointer data)
|
||||
on_selection_text_received (SelectionWatch *self, const gchar *text)
|
||||
{
|
||||
Application *app = data;
|
||||
rearm_selection_watcher (app);
|
||||
// Strip ASCII whitespace: this is compatible with UTF-8
|
||||
while (g_ascii_isspace (*text))
|
||||
text++;
|
||||
gsize text_len = strlen (text);
|
||||
while (text_len && g_ascii_isspace (text[text_len - 1]))
|
||||
text_len--;
|
||||
|
||||
if (text)
|
||||
{
|
||||
// Strip ASCII whitespace: this is compatible with UTF-8
|
||||
while (g_ascii_isspace (*text))
|
||||
text++;
|
||||
gsize text_len = strlen (text);
|
||||
while (text_len && g_ascii_isspace (text[text_len - 1]))
|
||||
text_len--;
|
||||
|
||||
if (app->selection_contents &&
|
||||
!strncmp (app->selection_contents, text, text_len))
|
||||
return;
|
||||
|
||||
g_free (app->selection_contents);
|
||||
app->selection_contents = g_strndup (text, text_len);
|
||||
app_set_input (app, text, text_len);
|
||||
}
|
||||
else if (app->selection_contents)
|
||||
{
|
||||
g_free (app->selection_contents);
|
||||
app->selection_contents = NULL;
|
||||
}
|
||||
if (text_len)
|
||||
app_set_input (self->app, text, text_len);
|
||||
}
|
||||
|
||||
static gboolean
|
||||
on_selection_timer (gpointer data)
|
||||
{
|
||||
Application *app = data;
|
||||
GtkClipboard *clipboard = gtk_clipboard_get (GDK_SELECTION_PRIMARY);
|
||||
gtk_clipboard_request_text (clipboard, on_selection_text_received, app);
|
||||
|
||||
app->selection_timer = 0;
|
||||
return FALSE;
|
||||
}
|
||||
#endif // WITH_GTK
|
||||
#endif // WITH_X11
|
||||
|
||||
static void
|
||||
log_handler_curses (Application *self, const gchar *message)
|
||||
@ -2091,7 +2220,7 @@ G_GNUC_END_IGNORE_DEPRECATIONS
|
||||
// g_unix_signal_add() cannot handle SIGWINCH
|
||||
install_winch_handler ();
|
||||
|
||||
// GtkClipboard can internally issue some rather disruptive warnings
|
||||
// Avoid disruptive warnings
|
||||
g_log_set_default_handler (log_handler, &app);
|
||||
|
||||
// Message loop
|
||||
@ -2102,8 +2231,17 @@ G_GNUC_END_IGNORE_DEPRECATIONS
|
||||
guint watch_winch = g_io_add_watch (g_io_channel_unix_new (g_winch_pipe[0]),
|
||||
G_IO_IN, process_winch_input, &app);
|
||||
|
||||
#ifdef WITH_X11
|
||||
SelectionWatch sw;
|
||||
selection_watch_init (&sw, &app);
|
||||
#endif // WITH_X11
|
||||
|
||||
app_run (&app);
|
||||
|
||||
#ifdef WITH_X11
|
||||
selection_watch_destroy (&sw);
|
||||
#endif // WITH_X11
|
||||
|
||||
g_source_remove (watch_term);
|
||||
g_source_remove (watch_int);
|
||||
g_source_remove (watch_stdin);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user