From 920f1f010284d59bad86f78355ed90ac2f3e1d2c Mon Sep 17 00:00:00 2001
From: Benji Dial <benji6283@gmail.com>
Date: Mon, 8 Mar 2021 16:46:22 -0500
Subject: mouse movement in raleigh, with colorpicker dragging example

---
 src/kernel/idt.c    |  3 ++-
 src/kernel/isrs.asm |  2 +-
 src/kernel/window.c | 16 ++++++++++++++++
 src/kernel/window.h |  2 ++
 4 files changed, 21 insertions(+), 2 deletions(-)

(limited to 'src/kernel')

diff --git a/src/kernel/idt.c b/src/kernel/idt.c
index f07ef1d..8de5448 100644
--- a/src/kernel/idt.c
+++ b/src/kernel/idt.c
@@ -208,7 +208,8 @@ void const *syscall_table[] = {
   &sc_is_task_running,
   &sc_get_timestamp,
   &sc_file_write,
-  &sc_file_set_size
+  &sc_file_set_size,
+  &window_wants_mouse_movements
 };
 
 //these aren't really void ()'s, but gcc complains if we take an address of a void, so we give it a type
diff --git a/src/kernel/isrs.asm b/src/kernel/isrs.asm
index 70bab19..673e891 100644
--- a/src/kernel/isrs.asm
+++ b/src/kernel/isrs.asm
@@ -26,7 +26,7 @@ extern exception_halt
 extern pf_check_stack
 extern dump
 
-n_syscalls equ 0x1c
+n_syscalls equ 0x1d
 
 ;section .bss
 ;_debug_is_start_task resb 1
diff --git a/src/kernel/window.c b/src/kernel/window.c
index b1d5f92..4b01bc4 100644
--- a/src/kernel/window.c
+++ b/src/kernel/window.c
@@ -38,6 +38,7 @@ static struct window {
   struct window *below;
 
   struct task_state *from_task;
+  bool wants_mouse_movements;
 } windows[MAX_WINDOWS];
 
 static struct window *bottom_window = 0;
@@ -322,6 +323,7 @@ got_window:
   send_action(top_window, (struct window_action){.action_type = FOCUS_ENTER});
 
   w->from_task = active_task;
+  w->wants_mouse_movements = false;
 
   paint_and_above(w);
   return w;
@@ -544,6 +546,16 @@ void move_mouse_by(int16_t y, int16_t x) {
     blit(old_x, old_x + MOUSE_WIDTH  > VBE_MODE_INFO->width  ? VBE_MODE_INFO->width  : old_x + MOUSE_WIDTH,
          old_y, old_y + MOUSE_HEIGHT > VBE_MODE_INFO->height ? VBE_MODE_INFO->height : old_y + MOUSE_HEIGHT);
     blit_mouse();
+    struct window *const moving_over = buffer[mouse_y * VBE_MODE_INFO->width + mouse_x].from_window;
+    if (moving_over && moving_over->wants_mouse_movements &&
+       (mouse_y >= moving_over->ypos) && (mouse_y < moving_over->ypos + moving_over->height) &&
+       (mouse_x >= moving_over->xpos) && (mouse_x < moving_over->xpos + moving_over->width))
+      send_action(moving_over, (struct window_action){
+        .action_type = MOUSE_MOVE, .moved_to = {
+          .x = mouse_x - moving_over->xpos,
+          .y = mouse_y - moving_over->ypos
+        }
+      });
   }
   switch_to_task_cr3();
 //logf(LOG_INFO, "new mouse coords: (%d, %d)", mouse_x, mouse_y);
@@ -628,4 +640,8 @@ void mouse_button(enum mouse_button which, bool up) {
     }
     send_action(clicked_on, (struct window_action){.action_type = up ? MOUSE_UP : MOUSE_DOWN, .as_mouse = {.y = mouse_y - clicked_on->ypos, .x = mouse_x - clicked_on->xpos, .which = which}});
   }
+}
+
+void window_wants_mouse_movements(struct window *w) {
+  w->wants_mouse_movements = true;
 }
\ No newline at end of file
diff --git a/src/kernel/window.h b/src/kernel/window.h
index a1f9716..a1d6be3 100644
--- a/src/kernel/window.h
+++ b/src/kernel/window.h
@@ -36,4 +36,6 @@ void show_shutdown();
 void move_mouse_by(int16_t y, int16_t x);
 void mouse_button(enum mouse_button which, bool up);
 
+void window_wants_mouse_movements(struct window *w);
+
 #endif
-- 
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