--- /dev/null
+/*
+ Copyright (C) 2009 Matthias Kruk <mkruk@matthiaskruk.de>
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ See the file COPYING for the full license text.
+*/
+
+#include <midori/midori.h>
+#include "mouse-gestures.h"
+
+#define MOUSE_GESTURES_VERSION "0.1"
+#define DEVIANCE 20 // the deviance to determine if a line is straight or not
+#define MINLENGTH 50 // the minimal length of a line to be treated as a gesture
+
+// #define __MOUSE_GESTURES_DEBUG__ // uncomment for debugging purposes
+
+MouseGesture *gesture;
+
+void mouse_gesture_clear(MouseGesture *g)
+{
+ g->start.x = 0;
+ g->start.y = 0;
+ g->middle.x = 0;
+ g->middle.y = 0;
+ g->end.x = 0;
+ g->end.y = 0;
+ g->last = MOUSE_BUTTON_UNSET;
+ return;
+}
+
+MouseGesture* mouse_gesture_new(void)
+{
+ MouseGesture *g = NULL;
+ if((g = g_new(MouseGesture, 1)) == NULL)
+ return(NULL);
+ mouse_gesture_clear(g);
+ return(g);
+}
+
+static gboolean mouse_gestures_handle_events(GtkWidget *widget, GdkEvent *event, MidoriBrowser *browser)
+{
+ if(event->type == GDK_BUTTON_PRESS) // a button was pressed
+ {
+ if(gesture->last == MOUSE_BUTTON_UNSET) // if the gesture was previously cleaned -> new gesture -> new start coordinates
+ {
+ gesture->start.x = event->button.x;
+ gesture->start.y = event->button.y;
+ gesture->last = event->button.button;
+ }
+ return(TRUE);
+ }
+ else if(event->type == GDK_MOTION_NOTIFY) // the mouse was moved
+ {
+ if(gesture->last != MOUSE_BUTTON_UNSET)
+ {
+ guint x, y;
+ x = event->motion.x;
+ y = event->motion.y;
+ if((gesture->start.x - x < DEVIANCE && gesture->start.x - x > -DEVIANCE) ||
+ (gesture->start.y - y < DEVIANCE && gesture->start.y - y > -DEVIANCE))
+ {
+ gesture->middle.x = x;
+ gesture->middle.y = y;
+ }
+ else if((gesture->middle.x - x < DEVIANCE && gesture->middle.x - x > -DEVIANCE) ||
+ (gesture->middle.y - y < DEVIANCE && gesture->middle.y - y > -DEVIANCE))
+ {
+ gesture->end.x = x;
+ gesture->end.y = y;
+ }
+ }
+ return(TRUE);
+ }
+ else if(event->type == GDK_BUTTON_RELEASE)
+ {
+ if(gesture->last == MOUSE_BUTTON_MIDDLE) // all mouse gestures will use the middle mouse button
+ {
+ // middle mouse button has been released
+ if(gesture->middle.x - gesture->start.x < DEVIANCE && gesture->middle.x - gesture->start.x > -DEVIANCE)
+ {
+ // StartNode to MiddleNode is a straight vertical line
+ if(gesture->middle.y > gesture->start.y + MINLENGTH)
+ {
+ // StartNode to MiddleNode is drawn downwards
+ if(gesture->middle.y - gesture->end.y < DEVIANCE && gesture->middle.y - gesture->end.y > -DEVIANCE && gesture->end.x > gesture->middle.x + MINLENGTH)
+ {
+ // MiddleNode to EndNode is a straight horizontal line (to the right) -> close tab
+ midori_browser_activate_action(browser, "TabClose");
+ #ifdef __MOUSE_GESTURES_DEBUG__
+ g_print("TabClose gesture\n");
+ #endif
+ }
+ else if(gesture->middle.y - gesture->end.y < DEVIANCE && gesture->middle.y - gesture->end.y > -DEVIANCE && gesture->end.x < gesture->middle.x - MINLENGTH)
+ {
+ // MiddleNode to EndNode is a straight horizontal line (to the left) -> reload
+ midori_browser_activate_action(browser, "Reload");
+ #ifdef __MOUSE_GESTURES_DEBUG__
+ g_print("Reload gesture\n");
+ #endif
+ }
+ else if(gesture->end.y == 0 && gesture->end.x == 0)
+ {
+ // no EndNode, just a vertical line -> new tab
+ midori_browser_activate_action(browser, "TabNew");
+ #ifdef __MOUSE_GESTURES_DEBUG__
+ g_print("TabNew gesture\n");
+ #endif
+ }
+ }
+ if(gesture->middle.y < gesture->start.y - MINLENGTH)
+ {
+ // StartNode to MiddleNode is drawn upwards
+ if(gesture->end.y == 0 && gesture->end.x == 0)
+ {
+ // no EndNode, just a vertical line -> stop
+ midori_browser_activate_action(browser, "Stop");
+ #ifdef __MOUSE_GESTURES_DEBUG__
+ g_print("Stop gesture\n");
+ #endif
+ }
+ }
+ }
+ else if(gesture->middle.y - gesture->start.y < DEVIANCE && gesture->middle.y - gesture->start.y > -DEVIANCE)
+ {
+ // Start Node to MiddleNode is a straight horizontal line
+ if(gesture->middle.x > gesture->start.x + MINLENGTH)
+ {
+ // the line was drawn from left to right
+ if(gesture->end.x == 0 && gesture->end.y == 0)
+ {
+ // we only have one horizontal line from left to right -> forward gesture
+ midori_browser_activate_action(browser, "Forward");
+ #ifdef __MOUSE_GESTURES_DEBUG__
+ g_print("Forward gesture\n");
+ #endif
+ }
+ }
+ else if(gesture->middle.x < gesture->start.x - MINLENGTH)
+ {
+ // the line was drawn from right to left
+ if(gesture->end.x == 0 && gesture->end.y == 0)
+ {
+ // we only have one horizontal line from right to left -> backwards gesture
+ midori_browser_activate_action(browser, "Back");
+ #ifdef __MOUSE_GESTURES_DEBUG__
+ g_print("Back gesture\n");
+ #endif
+ }
+ }
+ }
+ }
+ mouse_gesture_clear(gesture); // gesture finished, clear it
+ return(TRUE);
+ }
+ else
+ return(FALSE); // this event is supposed to be handled again (by someone else's code) since it was irrelevant to us
+}
+
+static void mouse_gestures_tab_cb(MidoriBrowser* browser, GtkWidget *view) // this is performed when a new tab is created
+{
+ g_signal_connect(view, "event", G_CALLBACK(mouse_gestures_handle_events), browser); // perform the above callback when an event from the view is received
+ return;
+}
+
+static void mouse_gestures_browser_cb(MidoriApp *app, MidoriBrowser *browser) // this is performed when ever a new window is created
+{
+ g_signal_connect(browser, "add-tab", G_CALLBACK(mouse_gestures_tab_cb), NULL); // connect the above callback to the "add-tab" signal of browser
+ return;
+}
+
+/* this is performed when the extension is deactivated.
+ disconnect all signal handlers, so that mouse gestures are no longer handled */
+static void mouse_gestures_deactivate(MidoriExtension *extension, MidoriApp *app)
+{
+ gulong signal_id = g_signal_handler_find(app, G_SIGNAL_MATCH_FUNC, 0, 0, NULL, mouse_gestures_browser_cb, NULL); // get the signal handler id
+ if(signal_id != 0) // if that id is valid
+ g_signal_handler_disconnect(app, signal_id); // disconnect the signal
+ KatzeArray *browsers = katze_object_get_object(app, "browsers"); // get the array that contains all browsers
+ guint i; // our counter variable :)
+ for(i = 0; i < katze_array_get_length(browsers); i++) // from the first to the last browser
+ {
+ MidoriBrowser *browser = katze_array_get_nth_item(browsers, i); // get a pointer on the current browser
+ signal_id = g_signal_handler_find(browser, G_SIGNAL_MATCH_FUNC, 0, 0, NULL, mouse_gestures_tab_cb, NULL); // search forthe signal handler id
+ if(signal_id != 0) // and if its not invalid..
+ g_signal_handler_disconnect(browser, signal_id); // disconnect it
+
+ GtkWidget *notebook = katze_object_get_object(browser, "notebook"); // get a pointer on the notebook
+ gint j; // another counter
+ for(j = 0; j < gtk_notebook_get_n_pages(GTK_NOTEBOOK(notebook)); j++) // from the first to the last tab
+ {
+ GtkWidget *page = gtk_notebook_get_nth_page(GTK_NOTEBOOK(notebook), j); // get a pointer on the tab's view
+ signal_id = g_signal_handler_find(page, G_SIGNAL_MATCH_FUNC, 0, 0, NULL, mouse_gestures_handle_events, NULL); // find the signal id of the event handler
+ if(signal_id != 0) // if the id is valid
+ g_signal_handler_disconnect(page, signal_id); // disconnect the handler
+ }
+ }
+ g_free(gesture); // free the structure that contains the gesture information
+ return;
+}
+
+static void mouse_gestures_activate(MidoriExtension *extension, MidoriApp *app) // this is performed on extension-activation
+{
+ g_signal_connect(app, "add-browser", G_CALLBACK(mouse_gestures_browser_cb), NULL); // connect the above callback to the "add-browser" signal of app
+ g_signal_connect(extension, "deactivate", G_CALLBACK(mouse_gestures_deactivate), app); // connect the deactivate callback to the extension
+ return;
+}
+
+MidoriExtension* extension_init(void)
+{
+ MidoriExtension* extension = NULL;
+ extension = g_object_new(MIDORI_TYPE_EXTENSION,
+ "name", "Mouse gestures",
+ "description", "Control Midori by moving the mouse",
+ "version", MOUSE_GESTURES_VERSION,
+ "authors", "Matthias Kruk <mkruk@matthiaskruk.de>", NULL);
+ g_signal_connect(extension, "activate", G_CALLBACK(mouse_gestures_activate), NULL); // connect the callback that's executed on activation
+ gesture = NULL; // initialise gesture pointer; initialising pointers is always a good choice
+ if((gesture = mouse_gesture_new()) == NULL) // allocate space for the gesture
+ {
+ // no space could be allocated
+ g_free(extension); // free the space used by this extension
+ return(NULL);
+ }
+ return(extension);
+}
projects / midori / commitdiff