add operator with menu entry

@@ -375,3 +375,3 @@
  * Calculate the extents of F-Curve's data.
  */
-bool BKE_fcurve_calc_bounds(const struct FCurve *fcu,
+bool BKE_fcurve_calc_bounds(struct FCurve *fcu,

@@ -382,2 +382,3 @@
                             bool do_sel_only,
-                            bool include_handles);
+                            bool include_handles,
+                            const float range[2]);

@@ -625,3 +626,1 @@
-        /* Get endpoint keyframes. */
-        foundvert = get_fcurve_end_keyframes(fcu, &bezt_first, &bezt_last, do_sel_only);
-
+        if (range == NULL) {

@@ -628,0 +628,4 @@
+          foundvert = get_fcurve_end_keyframes(fcu, &bezt_first, &bezt_last, do_sel_only);
+        }
+        else {
+          /* If a range is passed in find the first and last keyframe within that range. */

@@ -3640,0 +3642,4 @@
+/** \name View Channel Operator
+ * \{ */
+
+static void get_normalized_fcurve_bounds(FCurve *fcu,

@@ -3640,0 +3645,4 @@
+static void get_normalized_fcurve_bounds(FCurve *fcu,
+                                         bAnimContext *ac,
+                                         bAnimListElem *ale,
+                                         bool include_handles,

@@ -3640,0 +3660,4 @@
+                         range);
+
+  float unitFac, offset;
+  short mapping_flag = ANIM_get_normalization_flags(ac);

@@ -3640,0 +3661,4 @@
+
+  float unitFac, offset;
+  short mapping_flag = ANIM_get_normalization_flags(ac);
+  unitFac = ANIM_unit_mapping_get_factor(ac->scene, ale->id, fcu, mapping_flag, &offset);

@@ -3640,0 +3665,4 @@
+  r_bounds->ymin += offset;
+  r_bounds->ymax += offset;
+  r_bounds->ymin *= unitFac;
+  r_bounds->ymax *= unitFac;

@@ -3640,0 +3726,4 @@
+  }
+}
+
+/* Take regions into account, that could block the view.

@@ -3640,0 +3733,4 @@
+  BLI_rctf_scale(bounds, 1.1f);
+
+  float pad_top = UI_TIME_SCRUB_MARGIN_Y;
+  float pad_bottom = BLI_listbase_is_empty(ED_context_get_markers(C)) ? V2D_SCROLL_HANDLE_HEIGHT :

@@ -3640,0 +3738,4 @@
+  BLI_rctf_pad_y(bounds, ac->region->winy, pad_bottom, pad_top);
+}
+
+/* Iterates through regions because the operator might not have been called from the correct

@@ -3640,0 +3764,4 @@
+  size_t anim_data_length = ANIM_animdata_filter(&ac, &anim_data, filter, ac.data, ac.datatype);
+
+  if (anim_data_length == 0) {
+    return OPERATOR_CANCELLED;

@@ -3641,0 +3663,4 @@
+
+  const float min_height = 0.01f;
+  const float height = BLI_rctf_size_y(r_bounds);
+  if (height < min_height) {