From 4ed070b68cf3bb85b6920ca9d77bd57cea966b70 Mon Sep 17 00:00:00 2001
From: Nulo <git@nulo.in>
Date: Sun, 7 Nov 2021 21:07:34 -0300
Subject: [PATCH] WIP: weird matching mechanism

---
 river/Keyboard.zig |  2 ++
 river/Seat.zig     | 28 +++++++++++++++++++++++++++-
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/river/Keyboard.zig b/river/Keyboard.zig
index ba82180..c2426cf 100644
--- a/river/Keyboard.zig
+++ b/river/Keyboard.zig
@@ -94,6 +94,7 @@ fn handleKey(listener: *wl.Listener(*wlr.Keyboard.event.Key), event: *wlr.Keyboa
 
     // First check translated keysyms as xkb reports them
     for (wlr_keyboard.xkb_state.?.keyGetSyms(keycode)) |sym| {
+        std.log.debug("sym: {}, mods: {}, released: {}", .{ sym, modifiers, released });
         // Handle builtin mapping only when keys are pressed
         if (!released and self.handleBuiltinMapping(sym)) {
             handled = true;
@@ -109,6 +110,7 @@ fn handleKey(listener: *wl.Listener(*wlr.Keyboard.event.Key), event: *wlr.Keyboa
     if (!handled) {
         const layout_index = wlr_keyboard.xkb_state.?.keyGetLayout(keycode);
         for (wlr_keyboard.keymap.?.keyGetSymsByLevel(keycode, layout_index, 0)) |sym| {
+            std.log.debug("Ignoring modifiers: sym: {}", .{sym});
             // Handle builtin mapping only when keys are pressed
             if (!released and self.handleBuiltinMapping(sym)) {
                 handled = true;
diff --git a/river/Seat.zig b/river/Seat.zig
index 966263d..0c0357b 100644
--- a/river/Seat.zig
+++ b/river/Seat.zig
@@ -323,6 +323,22 @@ pub fn handleViewUnmap(self: *Self, view: *View) void {
     if (self.focused == .view and self.focused.view == view) self.focus(null);
 }
 
+fn getMatches(
+    mod1: wlr.Keyboard.ModifierMask,
+    mod2: wlr.Keyboard.ModifierMask,
+) u5 {
+    var this: u5 = 0;
+    if (mod1.shift and mod2.shift) this += 1;
+    if (mod1.caps and mod2.caps) this += 1;
+    if (mod1.ctrl and mod2.ctrl) this += 1;
+    if (mod1.alt and mod2.alt) this += 1;
+    if (mod1.mod2 and mod2.mod2) this += 1;
+    if (mod1.mod3 and mod2.mod3) this += 1;
+    if (mod1.logo and mod2.logo) this += 1;
+    if (mod1.mod5 and mod2.mod5) this += 1;
+    return this;
+}
+
 /// Handle any user-defined mapping for the passed keysym and modifiers
 /// Returns true if the key was handled
 pub fn handleMapping(
@@ -332,8 +348,18 @@ pub fn handleMapping(
     released: bool,
 ) bool {
     const modes = &server.config.modes;
+    var highest_match: u5 = 0;
     for (modes.items[self.mode_id].mappings.items) |*mapping| {
-        if (std.meta.eql(modifiers, mapping.modifiers) and keysym == mapping.keysym and released == mapping.release) {
+        if (keysym != mapping.keysym or released != mapping.release) continue;
+        const matches = getMatches(mapping.modifiers, modifiers);
+        if (matches > highest_match) {
+            highest_match = matches;
+        }
+    }
+    for (modes.items[self.mode_id].mappings.items) |*mapping| {
+        const matches = getMatches(mapping.modifiers, modifiers);
+        if (matches == highest_match and keysym == mapping.keysym and released == mapping.release) {
+            std.log.debug("Using first highest match ({}) mapping: {}", .{ highest_match, mapping });
             if (mapping.repeat) {
                 self.repeating_mapping = mapping;
                 self.mapping_repeat_timer.timerUpdate(server.config.repeat_delay) catch {