Update UI for stacktrace filters for show/hide

Rather than putting everything in the show category, move all of those into the
hide category and put the "positive" filters on the top line. Modify the fuction
to return the correct face for filters.

Author: Dan Sutton

cider-stacktrace.el

@@ -117,24 +117,18 @@ The error types are represented as strings."
   :group 'cider-stacktrace
   :package-version '(cider . "0.7.0"))
 
-(defface cider-stacktrace-filter-shown-face
+(defface cider-stacktrace-filter-active-face
   '((t (:inherit button :underline t :weight normal)))
   "Face for filter buttons representing frames currently visible"
   :group 'cider-stacktrace
   :package-version '(cider . "0.6.0"))
 
-(defface cider-stacktrace-filter-hidden-face
+(defface cider-stacktrace-filter-inactive-face
   '((t (:inherit button :underline nil :weight normal)))
   "Face for filter buttons representing frames currently filtered out"
   :group 'cider-stacktrace
   :package-version '(cider . "0.6.0"))
 
-(defface cider-stacktrace-filter-positive-face
-  '((t (:inherit button :underline t :weight normal)))
-  "Face for filter buttons representing frames currently filtered out"
-  :group 'cider-stacktrace
-  :package-version '(cider . "0.15.0"))
-
 (defface cider-stacktrace-face
   '((t (:inherit default)))
   "Face for stack frame text"
@@ -252,11 +246,18 @@ The error types are represented as strings."
 
 (defun cider-stacktrace--face-for-filter (filter neg-filters pos-filters)
   "Return whether we should mark the filter is active or not."
-  (cond ((member filter neg-filters) 'cider-stacktrace-filter-hidden-face)
-        ((member filter pos-filters) 'cider-stacktrace-filter-positive-face)
-        ((member filter '(project)) 'cider-stacktrace-filter-hidden-face)
-        ((null filter) 'cider-stacktrace-filter-hidden-face)
-        (t 'cider-stacktrace-filter-shown-face)))
+  (cond ((member filter '(clj java repl tooling dup)) ; negative filter
+         (if (member filter neg-filters)
+             'cider-stacktrace-filter-active-face
+           'cider-stacktrace-filter-inactive-face))
+        ((member filter '(project))                   ; positive filter
+         (if (member filter pos-filters)
+             'cider-stacktrace-filter-active-face
+           'cider-stacktrace-filter-inactive-face))
+        ((null filter)                               ; "all" filter
+         (if (null neg-filters)
+             'cider-stacktrace-filter-active-face
+           'cider-stacktrace-filter-inactive-face))))
 
 (defun cider-stacktrace-indicate-filters (filters pos-filters)
   "Update enabled state of filter buttons.
@@ -594,17 +595,20 @@ prompt and whether to use a new window.  Similar to `cider-find-var'."
       (setq-local fill-prefix indent)
       (fill-region beg (point)))))
 
-(defun cider-stacktrace-render-filters (buffer filters)
+(defun cider-stacktrace-render-filters (buffer special-filters filters)
   "Emit into BUFFER toggle buttons for each of the FILTERS."
   (with-current-buffer buffer
     (insert "  Show: ")
-    (insert-text-button "Project-Only"
-                        'filter 'project
-                        'follow-link t
-                        'action 'cider-stacktrace-show-only-project
-                        'help-echo "Project frames only")
-    (insert " ") ;; if you put the space after project-only the button
-                 ;; highlighting spills into the next button
+    (dolist (filter special-filters)
+      (insert-text-button (car filter)
+                          'filter (cadr filter)
+                          'follow-link t
+                          'action (or (nth 3 filter) 'cider-stacktrace-filter)
+                          'help-echo (format "Toggle %s stack frames"
+                                             (car filter)))
+      (insert " "))
+    (insert "\n")
+    (insert "  Hide: ")
     (dolist (filter filters)
       (insert-text-button (car filter)
                           'filter (cadr filter)
@@ -768,8 +772,9 @@ through the `cider-stacktrace-suppressed-errors' variable."
       ;; Stacktrace filters
       (cider-stacktrace-render-filters
        buffer
+       `(("Project-Only" project cider-stacktrace-show-only-project) ("All" ,nil))
        `(("Clojure" clj) ("Java" java) ("REPL" repl)
-         ("Tooling" tooling) ("Duplicates" dup) ("All" ,nil)))
+         ("Tooling" tooling) ("Duplicates" dup)))
       (insert "\n")
       ;; Option to suppress internal/middleware errors
       (when error-types