Divec has uploaded a new change for review.
https://gerrit.wikimedia.org/r/315199
Change subject: ve.Range: Don't fixup invalid arguments
......................................................................
ve.Range: Don't fixup invalid arguments
Hitherto, calls such as "new ve.Range( NaN, undefined )" that indicate a
programming error were
having their invalid arguments whitewashed to 0. This impeded debugging,
particularly as range
calculation errors can often propagate quite far before surfacing.
Change-Id: I05a99fb8f6760af875aca64400832e9ade236fac
---
M src/ve.Range.js
1 file changed, 7 insertions(+), 3 deletions(-)
git pull ssh://gerrit.wikimedia.org:29418/VisualEditor/VisualEditor
refs/changes/99/315199/1
diff --git a/src/ve.Range.js b/src/ve.Range.js
index c12dccf..4047200 100644
--- a/src/ve.Range.js
+++ b/src/ve.Range.js
@@ -8,12 +8,16 @@
* @class
*
* @constructor
- * @param {number} from Anchor offset
+ * @param {number} [from=0] Anchor offset
* @param {number} [to=from] Focus offset
*/
ve.Range = function VeRange( from, to ) {
- this.from = from || 0;
- this.to = to === undefined ? this.from : to;
+ // For ease of debugging, check arguments.length when applying
defaults, to preserve
+ // invalid arguments such as undefined and NaN that indicate a
programming error.
+ // Range calculation errors often seem to propagate quite far before
surfacing, so the
+ // indication is important.
+ this.from = arguments.length >= 1 ? from : 0;
+ this.to = arguments.length >= 2 ? to : this.from;
this.start = this.from < this.to ? this.from : this.to;
this.end = this.from < this.to ? this.to : this.from;
};
--
To view, visit https://gerrit.wikimedia.org/r/315199
To unsubscribe, visit https://gerrit.wikimedia.org/r/settings
Gerrit-MessageType: newchange
Gerrit-Change-Id: I05a99fb8f6760af875aca64400832e9ade236fac
Gerrit-PatchSet: 1
Gerrit-Project: VisualEditor/VisualEditor
Gerrit-Branch: master
Gerrit-Owner: Divec <da...@troi.org>
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