feat: Allow text property APIs to accept layer/group names defined by define-tp/define-tp-group

- Add tp--resolve-props helper function to resolve layer/group names to property lists
- Modify tp--parse-args to handle layer name symbols for tp-set, tp-reset, tp-add
- Update tp-match-set, tp-match-reset, tp-match-add to accept layer names
- Update tp-regexp-set, tp-regexp-reset, tp-regexp-add to accept layer names
- Update docstrings to document the new functionality
- Add comprehensive tests for all affected functions

Co-authored-by: Kinneyzhang <38454496+Kinneyzhang@users.noreply.github.com>

tp-tests.el

@@ -2042,5 +2042,169 @@ Returns list of (START END VALUE) intervals."
       ;; Cleanup
       (makunbound 'tp-test-undef-color))))
 
+;;; ============================================================
+;;; Layer Name in Property-Setting APIs Tests
+;;; ============================================================
+
+(ert-deftest tp-test-set-with-layer-name ()
+  "Test tp-set accepts a layer name defined by define-tp."
+  (tp-test-with-temp-buffer
+    (insert "Hello World")
+    (tp-define-layer my-style (face bold help-echo "tip"))
+    ;; Use layer name instead of plist
+    (tp-set 1 6 'my-style)
+    (should (eq (tp-at 1 'face) 'bold))
+    (should (equal (tp-at 1 'help-echo) "tip"))))
+
+(ert-deftest tp-test-set-with-layer-name-on-string ()
+  "Test tp-set accepts a layer name on string."
+  (let ((str (copy-sequence "Hello World")))
+    (setq tp-layer-alist nil)
+    (setq tp-layer-groups nil)
+    (tp-define-layer my-style (face italic))
+    (tp-set 0 5 'my-style str)
+    (should (eq (get-text-property 0 'face str) 'italic))))
+
+(ert-deftest tp-test-reset-with-layer-name ()
+  "Test tp-reset accepts a layer name defined by define-tp."
+  (tp-test-with-temp-buffer
+    (insert "Hello World")
+    (tp-set 1 6 '(mouse-face highlight))
+    (tp-define-layer my-style (face underline))
+    ;; Use layer name - should completely replace
+    (tp-reset 1 6 'my-style)
+    (should (eq (tp-at 1 'face) 'underline))
+    (should (null (tp-at 1 'mouse-face)))))
+
+(ert-deftest tp-test-add-with-layer-name ()
+  "Test tp-add accepts a layer name defined by define-tp."
+  (tp-test-with-temp-buffer
+    (insert "Hello World")
+    (tp-set 1 6 '(help-echo "existing"))
+    (tp-define-layer my-style (face bold))
+    ;; Use layer name - should preserve existing properties
+    (tp-add 1 6 'my-style)
+    (should (eq (tp-at 1 'face) 'bold))
+    (should (equal (tp-at 1 'help-echo) "existing"))))
+
+(ert-deftest tp-test-match-set-with-layer-name ()
+  "Test tp-match-set accepts a layer name."
+  (tp-test-with-temp-buffer
+    (insert "Hello World Hello")
+    (tp-define-layer match-style (face bold help-echo "matched"))
+    (tp-match-set "Hello" 'match-style)
+    (should (eq (tp-at 1 'face) 'bold))
+    (should (equal (tp-at 1 'help-echo) "matched"))
+    (should (eq (tp-at 13 'face) 'bold))))
+
+(ert-deftest tp-test-match-set-with-layer-name-on-string ()
+  "Test tp-match-set accepts a layer name on string."
+  (let ((str (copy-sequence "Hello World Hello")))
+    (setq tp-layer-alist nil)
+    (setq tp-layer-groups nil)
+    (tp-define-layer match-style (face italic))
+    (tp-match-set "Hello" 'match-style str)
+    (should (eq (get-text-property 0 'face str) 'italic))
+    (should (eq (get-text-property 12 'face str) 'italic))))
+
+(ert-deftest tp-test-match-reset-with-layer-name ()
+  "Test tp-match-reset accepts a layer name."
+  (tp-test-with-temp-buffer
+    (insert "Hello World Hello")
+    (tp-set 1 6 '(mouse-face highlight))
+    (tp-define-layer match-style (face bold))
+    (tp-match-reset "Hello" 'match-style)
+    (should (eq (tp-at 1 'face) 'bold))
+    (should (null (tp-at 1 'mouse-face)))))
+
+(ert-deftest tp-test-match-add-with-layer-name ()
+  "Test tp-match-add accepts a layer name."
+  (tp-test-with-temp-buffer
+    (insert "Hello World Hello")
+    (tp-set 1 6 '(help-echo "original"))
+    (tp-define-layer match-style (face bold))
+    (tp-match-add "Hello" 'match-style)
+    (should (eq (tp-at 1 'face) 'bold))
+    (should (equal (tp-at 1 'help-echo) "original"))))
+
+(ert-deftest tp-test-regexp-set-with-layer-name ()
+  "Test tp-regexp-set accepts a layer name."
+  (tp-test-with-temp-buffer
+    (insert "abc 123 def 456")
+    (tp-define-layer number-style (face bold help-echo "number"))
+    (tp-regexp-set "[0-9]+" 'number-style)
+    (should (eq (tp-at 5 'face) 'bold))
+    (should (equal (tp-at 5 'help-echo) "number"))
+    (should (eq (tp-at 13 'face) 'bold))))
+
+(ert-deftest tp-test-regexp-set-with-layer-name-on-string ()
+  "Test tp-regexp-set accepts a layer name on string."
+  (let ((str (copy-sequence "abc 123 def 456")))
+    (setq tp-layer-alist nil)
+    (setq tp-layer-groups nil)
+    (tp-define-layer number-style (face italic))
+    (tp-regexp-set "[0-9]+" 'number-style str)
+    (should (eq (get-text-property 4 'face str) 'italic))
+    (should (eq (get-text-property 12 'face str) 'italic))))
+
+(ert-deftest tp-test-regexp-reset-with-layer-name ()
+  "Test tp-regexp-reset accepts a layer name."
+  (tp-test-with-temp-buffer
+    (insert "abc 123 def 456")
+    (tp-set 5 8 '(mouse-face highlight))
+    (tp-define-layer number-style (face bold))
+    (tp-regexp-reset "[0-9]+" 'number-style)
+    (should (eq (tp-at 5 'face) 'bold))
+    (should (null (tp-at 5 'mouse-face)))))
+
+(ert-deftest tp-test-regexp-add-with-layer-name ()
+  "Test tp-regexp-add accepts a layer name."
+  (tp-test-with-temp-buffer
+    (insert "abc 123 def 456")
+    (tp-set 5 8 '(help-echo "original"))
+    (tp-define-layer number-style (face bold))
+    (tp-regexp-add "[0-9]+" 'number-style)
+    (should (eq (tp-at 5 'face) 'bold))
+    (should (equal (tp-at 5 'help-echo) "original"))))
+
+(ert-deftest tp-test-set-with-group-name ()
+  "Test tp-set accepts a group name defined by define-tp-group."
+  (tp-test-with-temp-buffer
+    (insert "Hello World")
+    (tp-define-layer-group my-group
+      ("style" . (face bold help-echo "grouped")))
+    ;; Use group name - should use first layer's properties
+    (tp-set 1 6 'my-group)
+    (should (eq (tp-at 1 'face) 'bold))
+    (should (equal (tp-at 1 'help-echo) "grouped"))))
+
+(ert-deftest tp-test-match-set-with-group-name ()
+  "Test tp-match-set accepts a group name."
+  (tp-test-with-temp-buffer
+    (insert "Hello World Hello")
+    (tp-define-layer-group my-group
+      ("style" . (face italic)))
+    (tp-match-set "Hello" 'my-group)
+    (should (eq (tp-at 1 'face) 'italic))
+    (should (eq (tp-at 13 'face) 'italic))))
+
+(ert-deftest tp-test-resolve-props-returns-nil-for-unknown ()
+  "Test tp--resolve-props returns nil for unknown layer name."
+  (tp-test-with-temp-buffer
+    (should (null (tp--resolve-props 'unknown-layer-name)))))
+
+(ert-deftest tp-test-set-with-complex-layer ()
+  "Test tp-set with layer containing complex nested properties."
+  (tp-test-with-temp-buffer
+    (insert "Hello World")
+    (tp-define-layer complex-layer
+      (face (:foreground "red" :underline (:style wave))
+            help-echo "complex"))
+    (tp-set 1 6 'complex-layer)
+    (let ((face (tp-at 1 'face)))
+      (should (equal (plist-get face :foreground) "red"))
+      (should (equal (plist-get (plist-get face :underline) :style) 'wave)))
+    (should (equal (tp-at 1 'help-echo) "complex"))))
+
 (provide 'tp-ert-tests)
 ;;; tp-ert-tests.el ends here

tp.el

@@ -248,7 +248,10 @@ Supports four calling conventions:
 1. Buffer region: (START END PROPS)
 2. Buffer region with object: (START END PROPS OBJECT)
 3. String region: (START END PROPS STRING)
-4. Entire string: (STRING PROP VAL ...)"
+4. Entire string: (STRING PROP VAL ...)
+
+PROPS can also be a symbol representing a layer or group name defined
+by `define-tp' or `define-tp-group', which will be resolved to its properties."
   (let (object start finish props)
     (cond
      ;; First arg is a string - apply to entire string
@@ -272,8 +275,11 @@ Supports four calling conventions:
         (setq object nil
               props props-or-val)))
      (t (error "Invalid first argument: %S" start-or-string)))
-    ;; Handle properties as a list
+    ;; Resolve layer/group name to properties if props is a symbol
-    (when (listp (car-safe props))
+    (when (symbolp props)
+      (setq props (or (tp--resolve-props props) props)))
+    ;; Handle properties as a list (only if props is a list and its first element is also a list)
+    (when (and (listp props) (listp (car-safe props)))
       (setq props (car props)))
     (list object start finish props)))
 
@@ -284,16 +290,22 @@ This function supports four calling conventions:
 
 1. Current buffer:
    (tp-set START END \\='(PROPERTY VALUE ...))
+   (tp-set START END LAYER-NAME)
 
 2. Specific buffer:
    (tp-set START END \\='(PROPERTY VALUE ...) BUFFER)
+   (tp-set START END LAYER-NAME BUFFER)
 
 3. Specific string (0-indexed positions):
    (tp-set START END \\='(PROPERTY VALUE ...) STRING)
+   (tp-set START END LAYER-NAME STRING)
 
 4. Entire string:
    (tp-set STRING PROPERTY VALUE ...)
 
+PROPS can also be a symbol representing a layer or group name defined
+by `define-tp' or `define-tp-group', which will be resolved to its properties.
+
 This replaces only the properties specified, preserving other properties.
 Return the modified object (string) or region (START . END) for buffer."
   (pcase-let ((`(,object ,start ,finish ,props)
@@ -318,16 +330,22 @@ This function supports four calling conventions:
 
 1. Current buffer:
    (tp-reset START END \\='(PROPERTY VALUE ...))
+   (tp-reset START END LAYER-NAME)
 
 2. Specific buffer:
    (tp-reset START END \\='(PROPERTY VALUE ...) BUFFER)
+   (tp-reset START END LAYER-NAME BUFFER)
 
 3. Specific string (0-indexed positions):
    (tp-reset START END \\='(PROPERTY VALUE ...) STRING)
+   (tp-reset START END LAYER-NAME STRING)
 
 4. Entire string:
    (tp-reset STRING PROPERTY VALUE ...)
 
+PROPS can also be a symbol representing a layer or group name defined
+by `define-tp' or `define-tp-group', which will be resolved to its properties.
+
 Unlike `tp-set', this completely replaces all existing properties.
 Return the modified object (string) or region (START . END) for buffer."
   (pcase-let ((`(,object ,start ,finish ,props)
@@ -415,16 +433,22 @@ This function supports four calling conventions:
 
 1. Current buffer:
    (tp-add START END \\='(PROPERTY VALUE ...))
+   (tp-add START END LAYER-NAME)
 
 2. Specific buffer:
    (tp-add START END \\='(PROPERTY VALUE ...) BUFFER)
+   (tp-add START END LAYER-NAME BUFFER)
 
 3. Specific string (0-indexed positions):
    (tp-add START END \\='(PROPERTY VALUE ...) STRING)
+   (tp-add START END LAYER-NAME STRING)
 
 4. Entire string:
    (tp-add STRING PROPERTY VALUE ...)
 
+PROPS can also be a symbol representing a layer or group name defined
+by `define-tp' or `define-tp-group', which will be resolved to its properties.
+
 Unlike `tp-set', this deeply merges nested properties.
 For example, \\='(face (:underline (:style wave))) will merge with
 existing face properties rather than replacing them entirely.
@@ -1030,13 +1054,16 @@ Merges nested plists instead of replacing them."
 
 PATTERN is a string (single pattern) or list of strings (multiple patterns).
 Each pattern will be matched and have properties applied.
-PLIST is a property list like \\='(face bold help-echo \"tip\").
+PLIST is a property list like \\='(face bold help-echo \"tip\"),
+or a symbol representing a layer/group name defined by `define-tp'
+or `define-tp-group'.
 OBJECT is a buffer or string; nil means current buffer.
 
 Returns:
 - For strings: the modified string
 - For buffers: list of (START . END) pairs for all matches."
-  (tp--match-apply pattern plist #'tp-set object))
+  (let ((props (if (symbolp plist) (or (tp--resolve-props plist) plist) plist)))
+    (tp--match-apply pattern props #'tp-set object)))
 
 (defun tp-match-reset (pattern plist &optional object)
   "Reset (completely replace) properties on all occurrences of PATTERN.
@@ -1044,14 +1071,17 @@ Returns:
   (tp-match-reset PATTERN PLIST &optional OBJECT)
 
 PATTERN is a string (single pattern) or list of strings (multiple patterns).
-PLIST is a property list like \\='(face bold help-echo \"tip\").
+PLIST is a property list like \\='(face bold help-echo \"tip\"),
+or a symbol representing a layer/group name defined by `define-tp'
+or `define-tp-group'.
 OBJECT is a buffer or string; nil means current buffer.
 
 Unlike `tp-match-set', this completely replaces all existing properties."
-  (tp--match-apply pattern plist
+  (let ((props (if (symbolp plist) (or (tp--resolve-props plist) plist) plist)))
+    (tp--match-apply pattern props
                      (lambda (start end props obj)
                        (set-text-properties start end props obj))
-                   object))
+                     object)))
 
 (defun tp-match-add (pattern plist &optional object)
   "Add/update properties on all occurrences of PATTERN.
@@ -1059,11 +1089,14 @@ Unlike `tp-match-set', this completely replaces all existing properties."
   (tp-match-add PATTERN PLIST &optional OBJECT)
 
 PATTERN is a string (single pattern) or list of strings (multiple patterns).
-PLIST is a property list like \\='(face bold help-echo \"tip\").
+PLIST is a property list like \\='(face bold help-echo \"tip\"),
+or a symbol representing a layer/group name defined by `define-tp'
+or `define-tp-group'.
 OBJECT is a buffer or string; nil means current buffer.
 
 Unlike `tp-match-set', this deeply merges nested properties."
-  (tp--match-apply pattern plist #'tp--deep-merge-apply object))
+  (let ((props (if (symbolp plist) (or (tp--resolve-props plist) plist) plist)))
+    (tp--match-apply pattern props #'tp--deep-merge-apply object)))
 
 (defun tp-regexp-set (pattern plist &optional object)
   "Set properties on all matches of PATTERN (regexp).
@@ -1072,13 +1105,16 @@ Unlike `tp-match-set', this deeply merges nested properties."
 
 PATTERN is a string (single regexp) or list of strings (multiple regexps).
 Each pattern will be matched and have properties applied.
-PLIST is a property list like \\='(face bold help-echo \"tip\").
+PLIST is a property list like \\='(face bold help-echo \"tip\"),
+or a symbol representing a layer/group name defined by `define-tp'
+or `define-tp-group'.
 OBJECT is a buffer or string; nil means current buffer.
 
 Returns:
 - For strings: the modified string
 - For buffers: list of (START . END) pairs for all matches."
-  (tp--regexp-apply pattern plist #'tp-set object))
+  (let ((props (if (symbolp plist) (or (tp--resolve-props plist) plist) plist)))
+    (tp--regexp-apply pattern props #'tp-set object)))
 
 (defun tp-regexp-reset (pattern plist &optional object)
   "Reset (completely replace) properties on all regexp matches of PATTERN.
@@ -1086,14 +1122,17 @@ Returns:
   (tp-regexp-reset PATTERN PLIST &optional OBJECT)
 
 PATTERN is a string (single regexp) or list of strings (multiple regexps).
-PLIST is a property list like \\='(face bold help-echo \"tip\").
+PLIST is a property list like \\='(face bold help-echo \"tip\"),
+or a symbol representing a layer/group name defined by `define-tp'
+or `define-tp-group'.
 OBJECT is a buffer or string; nil means current buffer.
 
 Unlike `tp-regexp-set', this completely replaces all existing properties."
-  (tp--regexp-apply pattern plist
+  (let ((props (if (symbolp plist) (or (tp--resolve-props plist) plist) plist)))
+    (tp--regexp-apply pattern props
                       (lambda (start end props obj)
                         (set-text-properties start end props obj))
-                    object))
+                      object)))
 
 (defun tp-regexp-add (pattern plist &optional object)
   "Add/update properties on all regexp matches of PATTERN.
@@ -1101,11 +1140,14 @@ Unlike `tp-regexp-set', this completely replaces all existing properties."
   (tp-regexp-add PATTERN PLIST &optional OBJECT)
 
 PATTERN is a string (single regexp) or list of strings (multiple regexps).
-PLIST is a property list like \\='(face bold help-echo \"tip\").
+PLIST is a property list like \\='(face bold help-echo \"tip\"),
+or a symbol representing a layer/group name defined by `define-tp'
+or `define-tp-group'.
 OBJECT is a buffer or string; nil means current buffer.
 
 Unlike `tp-regexp-set', this deeply merges nested properties."
-  (tp--regexp-apply pattern plist #'tp--deep-merge-apply object))
+  (let ((props (if (symbolp plist) (or (tp--resolve-props plist) plist) plist)))
+    (tp--regexp-apply pattern props #'tp--deep-merge-apply object)))
 
 ;;; Search functions
 
@@ -1911,6 +1953,37 @@ Appends 'tp-name property to identify the layer."
               (tp-layer-props layer))
             layers)))
 
+(defun tp--resolve-props (props)
+  "Resolve PROPS to a property list.
+PROPS can be:
+- A symbol (layer name from `tp-layer-alist' or group name from `tp-layer-groups')
+- A plist (returned as-is)
+
+If PROPS is a symbol:
+- First checks `tp-layer-alist' and returns the layer properties
+- Then checks `tp-layer-groups' and returns the first layer's properties
+
+Unlike `tp-layer-props', this does NOT add the `tp-name' property,
+making it suitable for use with basic property-setting APIs like
+`tp-set', `tp-add', `tp-match-set', etc."
+  (cond
+   ;; Already a plist - return as-is
+   ((listp props) props)
+   ;; Symbol - check if it's a layer or group name
+   ((symbolp props)
+    (cond
+     ;; Check layer first
+     ((assoc props tp-layer-alist)
+      (cdr (assoc props tp-layer-alist)))
+     ;; Check group (use first layer's properties)
+     ((assoc props tp-layer-groups)
+      (when-let* ((layers (cdr (assoc props tp-layer-groups)))
+                  (first-layer (car layers)))
+        (cdr (assoc first-layer tp-layer-alist))))
+     ;; Not found - return nil (let caller decide how to handle)
+     (t nil)))
+   (t nil)))
+
 (defun tp-layer-reset ()
   "Reset all layer definitions.
 Clears both `tp-layer-alist' and `tp-layer-groups'.