added detection for double and triple mouse clicks

diff --git a/mouse.c b/mouse.c
index 556bdeffb168b819c1d65f930e5d8630478e7e4c..fcde8852bf1d8345d34a30bacecd506089e88be1 100644 (file)
--- a/mouse.c
+++ b/mouse.c
@@ -1,20 +1,110 @@
 #include "edit.h"
 
+struct {
+    uint32_t time;
+    uint32_t count;
+} Buttons[5] = { {0,0}, {0,0}, {0,0} };
+
 extern Buf Buffer;
 extern unsigned CursorPos;
 
+#ifndef __MACH__
+#include <time.h>
+#else
+#include <sys/time.h>
+#define CLOCK_MONOTONIC 0
+// clock_gettime is not implemented on OSX
+int clock_gettime(int id, struct timespec* t) {
+    (void)id;
+    struct timeval now;
+    int rv = gettimeofday(&now, NULL);
+    if (rv) return rv;
+    t->tv_sec  = now.tv_sec;
+    t->tv_nsec = now.tv_usec * 1000;
+    return 0;
+}
+#endif
+
+uint32_t getmillis(void) {
+    struct timespec time;
+    clock_gettime(CLOCK_MONOTONIC, &time);
+    return ((time.tv_sec * 1000) + (time.tv_nsec / 1000000));
+}
+
+/*****************************************************************************/
+
+enum {
+    SINGLE_CLICK = 0,
+    DOUBLE_CLICK,
+    TRIPLE_CLICK
+};
+
+void unused(MouseEvent* mevnt) {
+    (void)mevnt;
+}
+
+void move_cursor(MouseEvent* mevnt) {
+    CursorPos = screen_getoff(&Buffer, CursorPos, mevnt->y, mevnt->x);
+}
+
+void select_word(MouseEvent* mevnt) {
+    (void)mevnt;
+}
+
+void select_line(MouseEvent* mevnt) {
+    (void)mevnt;
+}
+
+void scrollup(MouseEvent* mevnt) {
+    (void)mevnt;
+    CursorPos = buf_byline(&Buffer, CursorPos, -ScrollLines);
+}
+
+void scrolldn(MouseEvent* mevnt) {
+    (void)mevnt;
+    CursorPos = buf_byline(&Buffer, CursorPos, ScrollLines);
+}
+
+void (*Actions[5][3])(MouseEvent* mevnt) = {
+    [MOUSE_LEFT] = {
+        [SINGLE_CLICK] = move_cursor,
+        [DOUBLE_CLICK] = select_word,
+        [TRIPLE_CLICK] = select_line,
+    },
+    [MOUSE_MIDDLE] = {
+        [SINGLE_CLICK] = unused,
+        [DOUBLE_CLICK] = unused,
+        [TRIPLE_CLICK] = unused,
+    },
+    [MOUSE_RIGHT] = {
+        [SINGLE_CLICK] = unused,
+        [DOUBLE_CLICK] = unused,
+        [TRIPLE_CLICK] = unused,
+    },
+    [MOUSE_WHEELUP] = {
+        [SINGLE_CLICK] = scrollup,
+        [DOUBLE_CLICK] = scrollup,
+        [TRIPLE_CLICK] = scrollup,
+    },
+    [MOUSE_WHEELDOWN] = {
+        [SINGLE_CLICK] = scrolldn,
+        [DOUBLE_CLICK] = scrolldn,
+        [TRIPLE_CLICK] = scrolldn,
+    },
+};
+
 void handle_mouse(MouseEvent* mevnt) {
-    switch (mevnt->button) {
-        case MOUSE_LEFT:
-            CursorPos = screen_getoff(&Buffer, CursorPos, mevnt->y, mevnt->x);
-            break;
-        case MOUSE_WHEELUP:
-            CursorPos = buf_byline(&Buffer, CursorPos, -ScrollLines);
-            break;
-        case MOUSE_WHEELDOWN:
-            CursorPos = buf_byline(&Buffer, CursorPos, ScrollLines);
-            break;
-        default:
-            break;
-    }
+    if (mevnt->button >= 5) return;
+    /* update the number of clicks */
+    uint32_t now = getmillis();
+    uint32_t elapsed = now - Buttons[mevnt->button].time;
+    if (elapsed <= 250)
+        Buttons[mevnt->button].count++;
+    else
+        Buttons[mevnt->button].count = 1;
+    Buttons[mevnt->button].time = now;
+    /* execute the click action */
+    uint32_t nclicks = Buttons[mevnt->button].count;
+    nclicks = (nclicks > 3 ? 1 : nclicks);
+    Actions[mevnt->button][nclicks-1](mevnt);
 }