1 files changed, 139 insertions, 0 deletions

diff --git a/examples/dte/msg.c b/examples/dte/msg.c
new file mode 100644
index 0000000..203347f
--- /dev/null
+++ b/examples/dte/msg.c
@@ -0,0 +1,139 @@
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "msg.h"
+#include "editor.h"
+#include "error.h"
+#include "util/debug.h"
+#include "util/numtostr.h"
+#include "util/path.h"
+#include "util/xmalloc.h"
+
+static void free_message(Message *m)
+{
+    if (m->loc) {
+        file_location_free(m->loc);
+    }
+    free(m);
+}
+
+Message *new_message(const char *msg, size_t len)
+{
+    Message *m = xmalloc(sizeof(*m) + len + 1);
+    m->loc = NULL;
+    if (len) {
+        memcpy(m->msg, msg, len);
+    }
+    m->msg[len] = '\0';
+    return m;
+}
+
+void add_message(MessageArray *msgs, Message *m)
+{
+    ptr_array_append(&msgs->array, m);
+}
+
+bool activate_current_message(EditorState *e)
+{
+    const MessageArray *msgs = &e->messages;
+    size_t count = msgs->array.count;
+    if (count == 0) {
+        return true;
+    }
+
+    size_t pos = msgs->pos;
+    BUG_ON(pos >= count);
+    const Message *m = msgs->array.ptrs[pos];
+    const FileLocation *loc = m->loc;
+    if (loc && loc->filename && !file_location_go(e->window, loc)) {
+        // Failed to jump to location; error message is visible
+        return false;
+    }
+
+    if (count == 1) {
+        info_msg("%s", m->msg);
+    } else {
+        info_msg("[%zu/%zu] %s", pos + 1, count, m->msg);
+    }
+
+    return true;
+}
+
+bool activate_current_message_save(EditorState *e)
+{
+    const View *view = e->view;
+    const BlockIter save = view->cursor;
+    FileLocation *loc = get_current_file_location(view);
+    bool ok = activate_current_message(e);
+
+    // Save position if file changed or cursor moved
+    view = e->view;
+    if (view->cursor.blk != save.blk || view->cursor.offset != save.offset) {
+        bookmark_push(&e->bookmarks, loc);
+    } else {
+        file_location_free(loc);
+    }
+
+    return ok;
+}
+
+void clear_messages(MessageArray *msgs)
+{
+    msgs->pos = 0;
+    ptr_array_free_cb(&msgs->array, FREE_FUNC(free_message));
+}
+
+String dump_messages(const MessageArray *messages)
+{
+    String buf = string_new(4096);
+    char cwd[8192];
+    if (unlikely(!getcwd(cwd, sizeof cwd))) {
+        return buf;
+    }
+
+    for (size_t i = 0, n = messages->array.count; i < n; i++) {
+        char *ptr = string_reserve_space(&buf, DECIMAL_STR_MAX(i));
+        buf.len += buf_umax_to_str(i + 1, ptr);
+        string_append_literal(&buf, ": ");
+
+        const Message *m = messages->array.ptrs[i];
+        const FileLocation *loc = m->loc;
+        if (!loc || !loc->filename) {
+            goto append_msg;
+        }
+
+        if (path_is_absolute(loc->filename)) {
+            char *rel = path_relative(loc->filename, cwd);
+            string_append_cstring(&buf, rel);
+            free(rel);
+        } else {
+            string_append_cstring(&buf, loc->filename);
+        }
+
+        string_append_byte(&buf, ':');
+
+        if (loc->pattern) {
+            string_append_literal(&buf, "  /");
+            string_append_cstring(&buf, loc->pattern);
+            string_append_literal(&buf, "/\n");
+            continue;
+        }
+
+        if (loc->line != 0) {
+            string_append_cstring(&buf, ulong_to_str(loc->line));
+            string_append_byte(&buf, ':');
+            if (loc->column != 0) {
+                string_append_cstring(&buf, ulong_to_str(loc->column));
+                string_append_byte(&buf, ':');
+            }
+        }
+
+        string_append_literal(&buf, "  ");
+
+        append_msg:
+        string_append_cstring(&buf, m->msg);
+        string_append_byte(&buf, '\n');
+    }
+
+    return buf;
+}