From a654b666c20aa4bb42116689f90f83d55484786f Mon Sep 17 00:00:00 2001
From: pommicket <pommicket@gmail.com>
Date: Fri, 6 Jan 2023 22:04:38 -0500
Subject: fix some autocomplete issues

also untested higher-than-1-second-resolution windows time_last_modified
---
 ide-autocomplete.c | 28 ++++++++++++++++++++++++----
 main.c             |  6 ++----
 os-win.c           | 25 +++++++++++++++++++++----
 3 files changed, 47 insertions(+), 12 deletions(-)

diff --git a/ide-autocomplete.c b/ide-autocomplete.c
index 4443c2b..bee99bf 100644
--- a/ide-autocomplete.c
+++ b/ide-autocomplete.c
@@ -394,11 +394,28 @@ void autocomplete_open(Ted *ted, uint32_t trigger) {
 
 static void autocomplete_find_phantom(Ted *ted) {
 	Autocomplete *ac = &ted->autocomplete;
-	if (ac->open) return;
-	if (!ted->active_buffer) return;
+	if (ac->open) {
+		autocomplete_clear_phantom(ac);
+		return;
+	}
+	if (!ted->active_buffer) {
+		autocomplete_clear_phantom(ac);
+		return;
+	}
 	TextBuffer *buffer = ted->active_buffer;
-	if (!buffer->path) return;
-	if (buffer->view_only) return;
+	if (!buffer->path) {
+		autocomplete_clear_phantom(ac);
+		return;
+	}
+	if (buffer->view_only) {
+		autocomplete_clear_phantom(ac);
+		return;
+	}
+	char32_t after_cursor = buffer_char_after_cursor(buffer);
+	if (is32_word(after_cursor)) {
+		autocomplete_clear_phantom(ac);
+		return;
+	}
 	autocomplete_find_completions(ted, TRIGGER_INVOKED, true);
 }
 
@@ -450,6 +467,9 @@ void autocomplete_frame(Ted *ted) {
 					colors[COLOR_TEXT] & 0xffffff7f);
 				text_render(font);
 				gl_geometry_draw();
+			} else {
+				// this phantom is no longer relevant
+				autocomplete_clear_phantom(ac);
 			}
 		} else {
 			// this phantom is no longer relevant
diff --git a/main.c b/main.c
index beb0acd..ba9c5e2 100644
--- a/main.c
+++ b/main.c
@@ -1,6 +1,5 @@
 /*
 @TODO:
-- do we need higher than 1-second resolution in time_last_modified on windows?
 - when searching files, put exact matches at the top
 - TESTING: make rust-analyzer-slow (waits 10s before sending response)
 - TESTING: check all IDE features with different servers
@@ -22,15 +21,14 @@ FUTURE FEATURES:
 - manual.md
 - better handling of backspace with space indentation
 - CSS highlighting
+- option for separate colors for read/write highlights
 - styles ([color] sections)
 - make go-to-definition/hover/highlight modifier key configurable
-- option for separate colors for read/write highlights
 - return to previous location in buffer
 - font setting & support for multiple fonts to cover more characters
 - comment-start & comment-end settings
 - robust find (results shouldn't move around when you type things)
-- multiple files with command line arguments
-- :set-build-command
+- open multiple files with command line arguments
 - document links using LSP textDocument/documentLink request
 - rename using LSP (textDocument/rename)
        - we have request writing & response parsing support for it, but that hasn't been tested yet
diff --git a/os-win.c b/os-win.c
index d7f29ca..c565a5b 100644
--- a/os-win.c
+++ b/os-win.c
@@ -109,12 +109,29 @@ int os_get_cwd(char *buf, size_t buflen) {
 	return 1;
 }
 
+#error "@TODO: test this"
 struct timespec time_last_modified(const char *filename) {
-	// windows' _stat does not have st_mtim
-	struct _stat statbuf = {0};
 	struct timespec ts = {0};
-	_stat(filename, &statbuf);
-	ts.tv_sec = statbuf.st_mtime;
+	FILETIME write_time = {0};
+	WCHAR wide_path[4100];
+	if (MultiByteToWideChar(CP_UTF8, 0, path, -1, wide_path, sizeof wide_path) == 0)
+		return ts;
+	HANDLE file = CreateFileW(wide_path, GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE, NULL,
+		OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL);
+	if (file == INVALID_HANDLE)
+		return ts;
+	
+	if (GetFileTime(file, NULL, NULL, &write_time)) {
+		u64 qword = (u64)write_time.dwLowDateTime
+			| (u64)write_time.dwHighDateTime << 32;
+		// annoyingly, windows gives time since jan 1, 1601 not 1970
+		// https://www.wolframalpha.com/input?i=number+of+days+between+jan+1%2C+1601+and+jan+1%2C+1970
+		qword -= (u64)10000000 * 134774 * 60 * 60 * 24;
+		ts.tv_sec = qword / 10000000;
+		ts.tv_nsec = (qword % 10000000) * 100;
+	}
+	
+	CloseHandle(file);
 	return ts;
 }
 
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