From a6a06900bf7206dc86017bbb1895272ebfac5418 Mon Sep 17 00:00:00 2001
From: pommicket <pommicket@gmail.com>
Date: Sat, 24 Dec 2022 12:02:40 -0500
Subject: start LSP setting

---
 buffer.c | 15 ++-------------
 config.c |  1 +
 lsp.c    |  5 +++++
 main.c   |  3 +--
 syntax.c |  9 +++++++++
 ted.c    | 37 ++++++++++++++++++++++++++++++++-----
 ted.cfg  |  3 +++
 ted.h    |  2 ++
 util.c   |  8 ++++++++
 9 files changed, 63 insertions(+), 20 deletions(-)

diff --git a/buffer.c b/buffer.c
index d904c38..831bf89 100644
--- a/buffer.c
+++ b/buffer.c
@@ -307,7 +307,7 @@ static long context_score(const char *path, Language lang, const SettingsContext
 	}
 	
 	if (context->path) {
-		if (path && str_has_prefix(path, context->path)) {
+		if (path && str_has_path_prefix(path, context->path)) {
 			score += (long)strlen(context->path);
 		} else {
 			// dont use this. it's path-specific and for the wrong path.
@@ -320,18 +320,7 @@ static long context_score(const char *path, Language lang, const SettingsContext
 
 // Get the settings used for this buffer.
 Settings *buffer_settings(TextBuffer *buffer) {
-	Ted *ted = buffer->ted;
-	long best_score = 0;
-	Settings *settings = ted->default_settings;
-	Language language = buffer_language(buffer);
-	arr_foreach_ptr(ted->all_settings, Settings, s) {
-		long score = context_score(buffer->filename, language, &s->context);
-		if (score > best_score) {
-			best_score = score;
-			settings = s;
-		}
-	}
-	return settings;
+	return ted_get_settings(buffer->ted, buffer->filename, buffer_language(buffer));
 }
 
 
diff --git a/config.c b/config.c
index f3b6428..9cfad1e 100644
--- a/config.c
+++ b/config.c
@@ -275,6 +275,7 @@ static OptionString const options_string[] = {
 	{"bg-shader", options_zero.bg_shader_text, sizeof options_zero.bg_shader_text, true},
 	{"bg-texture", options_zero.bg_shader_image, sizeof options_zero.bg_shader_image, true},
 	{"root-identifiers", options_zero.root_identifiers, sizeof options_zero.root_identifiers, true},
+	{"lsp", options_zero.lsp, sizeof options_zero.lsp, true},
 };
 
 static void option_bool_set(Settings *settings, const OptionBool *opt, bool value) {
diff --git a/lsp.c b/lsp.c
index a8a2445..7aa4d56 100644
--- a/lsp.c
+++ b/lsp.c
@@ -295,6 +295,11 @@ LSP *lsp_create(const char *root_dir, Language language, const char *analyzer_co
 	LSP *lsp = calloc(1, sizeof *lsp);
 	if (!lsp) return NULL;
 	
+	#if DEBUG
+		printf("Starting up LSP `%s` for language %s in %s\n",
+			analyzer_command, language_to_str(language), root_dir);
+	#endif
+	
 	ProcessSettings settings = {
 		.stdin_blocking = true,
 		.stdout_blocking = false,
diff --git a/main.c b/main.c
index a93439a..9df6824 100644
--- a/main.c
+++ b/main.c
@@ -1,7 +1,6 @@
 /*
 @TODO:
-- LSP setting
-   - figure out workspace using root-files variable (also do this for :build)
+- why is it creating the LSP on exit
 - make sure "save as" works
 - more LSP stuff:
      - go to definition using LSP
diff --git a/syntax.c b/syntax.c
index b156451..dfd7035 100644
--- a/syntax.c
+++ b/syntax.c
@@ -13,6 +13,15 @@ Language language_from_str(char const *str) {
 	return LANG_NONE;
 }
 
+const char *language_to_str(Language language) {
+	for (int i = 0; i < LANG_COUNT; ++i) {
+		if (language_names[i].lang == language)
+			return language_names[i].name;
+	}
+	return "???";
+
+}
+
 // start of single line comment for language l -- used for comment/uncomment selection
 char const *language_comment_start(Language l) {
 	switch (l) {
diff --git a/ted.c b/ted.c
index 9000676..3472a98 100644
--- a/ted.c
+++ b/ted.c
@@ -78,14 +78,41 @@ Settings *ted_active_settings(Ted *ted) {
 	return settings;
 }
 
-LSP *ted_get_lsp(Ted *ted, const char *path, Language lang) {
-	for (int i = 0; i < TED_LSP_MAX; ++i) {
+Settings *ted_get_settings(Ted *ted, const char *path, Language language) {
+	long best_score = 0;
+	Settings *settings = ted->default_settings;
+	arr_foreach_ptr(ted->all_settings, Settings, s) {
+		long score = context_score(path, language, &s->context);
+		if (score > best_score) {
+			best_score = score;
+			settings = s;
+		}
+	}
+	return settings;
+}
+
+LSP *ted_get_lsp(Ted *ted, const char *path, Language language) {
+	int i;
+	for (i = 0; i < TED_LSP_MAX; ++i) {
 		LSP *lsp = ted->lsps[i];
 		if (!lsp) break;
-		if (lsp->language != lang) continue;
-		if (!str_has_prefix(path, lsp->root_dir)) continue;
-		return lsp;
+		if (lsp->language != language) continue;
+		
+		// check if root matches up
+		const char *lsp_root = lsp->root_dir;
+		if (str_has_path_prefix(path, lsp_root))
+			return lsp;
 	}
+	if (i == TED_LSP_MAX)
+		return NULL; // why are there so many LSP open???
+	Settings *settings = ted_get_settings(ted, path, language);
+	if (*settings->lsp) {
+		// start up this LSP
+		char *root_dir = settings_get_root_dir(settings, path);
+		ted->lsps[i] = lsp_create(root_dir, language, settings->lsp);
+		free(root_dir);
+	}
+	
 	return NULL;
 }
 
diff --git a/ted.cfg b/ted.cfg
index ef6f862..f10f4b0 100644
--- a/ted.cfg
+++ b/ted.cfg
@@ -70,6 +70,9 @@ root-identifiers = .ted-root.out, Cargo.toml, make.bat, CMakeLists.txt, Makefile
 # bg-texture = "/path/to/my/cool/picture.jpg" (or .png, .gif, .bmp)
 # bg-shader = "void main() { gl_FragColor = texture2D(t_texture, t_pos) * vec4(1.0,1.0,1.0,0.2); }"
 
+[Rust.core]
+lsp = "rust-analyzer"
+
 [keyboard]
 # motion and selection
 Left = :left
diff --git a/ted.h b/ted.h
index 637bed3..55a97eb 100644
--- a/ted.h
+++ b/ted.h
@@ -199,6 +199,7 @@ typedef struct {
 	char bg_shader_text[4096];
 	char bg_shader_image[TED_PATH_MAX];
 	char root_identifiers[4096];
+	char lsp[512];
 	char build_default_command[256];
 	// [i] = comma-separated string of file extensions for language i, or NULL for none
 	char *language_extensions[LANG_COUNT];
@@ -519,6 +520,7 @@ void command_execute(Ted *ted, Command c, i64 argument);
 void ted_switch_to_buffer(Ted *ted, TextBuffer *buffer);
 // the settings of the active buffer, or the default settings if there is no active buffer
 Settings *ted_active_settings(Ted *ted);
+Settings *ted_get_settings(Ted *ted, const char *path, Language lang);
 void ted_load_configs(Ted *ted, bool reloading);
 struct LSP *ted_get_lsp(Ted *ted, const char *path, Language lang);
 static TextBuffer *find_search_buffer(Ted *ted);
diff --git a/util.c b/util.c
index 32115cf..a87d230 100644
--- a/util.c
+++ b/util.c
@@ -80,6 +80,14 @@ static bool str_has_prefix(char const *str, char const *prefix) {
 	return strncmp(str, prefix, strlen(prefix)) == 0;
 }
 
+// e.g. "/usr/share/bla" has the path prefix "/usr/share" but not "/usr/sha"
+static bool str_has_path_prefix(const char *path, const char *prefix) {
+	size_t prefix_len = strlen(prefix);
+	if (strncmp(path, prefix, prefix_len) != 0)
+		return false;
+	return path[prefix_len] == '\0' || strchr(ALL_PATH_SEPARATORS, path[prefix_len]);
+}
+
 static bool streq(char const *a, char const *b) {
 	return strcmp(a, b) == 0;
 }
-- 
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