Move creating a GrDiffProcessor to the diff model
*Replacing* the current GrDiffProcessor will happen in a follow-up.
Release-Notes: skip
Google-Bug-Id: b/280019334
Change-Id: I6863d863c397e638928e36668a02e1996febe30e
diff --git a/polygerrit-ui/app/embed/diff/gr-diff/gr-diff-utils.ts b/polygerrit-ui/app/embed/diff/gr-diff/gr-diff-utils.ts
index d309556..0b688a6 100644
--- a/polygerrit-ui/app/embed/diff/gr-diff/gr-diff-utils.ts
+++ b/polygerrit-ui/app/embed/diff/gr-diff/gr-diff-utils.ts
@@ -188,6 +188,45 @@
right: {[key: string]: boolean};
}
+/**
+ * "Context" is the number of lines that we are showing around diff chunks and
+ * commented lines. This typically comes from a user preference and is set to
+ * something like 3 or 10.
+ *
+ * `FULL_CONTEXT` means that the user wants to see the entire file. We could
+ * also call this "infinite context".
+ */
+export const FULL_CONTEXT = -1;
+
+export enum FullContext {
+ /** User has opted into showing the full context. */
+ YES = 'YES',
+ /** User has opted into showing only limited context. */
+ NO = 'NO',
+ /**
+ * User has not decided yet. Will see a warning message with two options then,
+ * if the file is too large.
+ */
+ UNDECIDED = 'UNDECIDED',
+}
+
+export function computeContext(
+ prefsContext: number | undefined,
+ showFullContext: FullContext,
+ defaultContext: number
+) {
+ if (showFullContext === FullContext.YES) {
+ return FULL_CONTEXT;
+ }
+ if (
+ prefsContext &&
+ !(showFullContext === FullContext.NO && prefsContext === FULL_CONTEXT)
+ ) {
+ return prefsContext;
+ }
+ return defaultContext;
+}
+
export function computeKeyLocations(
lineOfInterest: DisplayLine | undefined,
comments: GrDiffCommentThread[]
