Absorb the matrix-react-sdk repository (#28192)

Co-authored-by: github-merge-queue <118344674+github-merge-queue@users.noreply.github.com> Co-authored-by: github-merge-queue <github-merge-queue@users.noreply.github.com> Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com> Co-authored-by: Florian Duros <florian.duros@ormaz.fr> Co-authored-by: Kim Brose <kim.brose@nordeck.net> Co-authored-by: Florian Duros <florianduros@element.io> Co-authored-by: R Midhun Suresh <hi@midhun.dev> Co-authored-by: dbkr <986903+dbkr@users.noreply.github.com> Co-authored-by: ElementRobot <releases@riot.im> Co-authored-by: dbkr <dbkr@users.noreply.github.com> Co-authored-by: David Baker <dbkr@users.noreply.github.com> Co-authored-by: Michael Telatynski <7t3chguy@gmail.com> Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com> Co-authored-by: David Langley <davidl@element.io> Co-authored-by: Michael Weimann <michaelw@matrix.org> Co-authored-by: Timshel <Timshel@users.noreply.github.com> Co-authored-by: Sahil Silare <32628578+sahil9001@users.noreply.github.com> Co-authored-by: Will Hunt <will@half-shot.uk> Co-authored-by: Hubert Chathi <hubert@uhoreg.ca> Co-authored-by: Andrew Ferrazzutti <andrewf@element.io> Co-authored-by: Robin <robin@robin.town> Co-authored-by: Tulir Asokan <tulir@maunium.net>
2024-10-16 13:31:55 +01:00
parent 2b99496025
commit c05c429803
3280 changed files with 586617 additions and 905 deletions
--- a/src/ImageUtils.ts
+++ b/src/ImageUtils.ts
@@ -0,0 +1,54 @@
+/*
+Copyright 2024 New Vector Ltd.
+Copyright 2015, 2016 , 2020 Copyright 2020 The Matrix.org Foundation C.I.C.
+
+SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
+Please see LICENSE files in the repository root for full details.
+*/
+
+/**
+ * Returns the actual height that an image of dimensions (fullWidth, fullHeight)
+ * will occupy if resized to fit inside a thumbnail bounding box of size
+ * (thumbWidth, thumbHeight).
+ *
+ * If the aspect ratio of the source image is taller than the aspect ratio of
+ * the thumbnail bounding box, then we return the thumbHeight parameter unchanged.
+ * Otherwise we return the thumbHeight parameter scaled down appropriately to
+ * reflect the actual height the scaled thumbnail occupies.
+ *
+ * This is very useful for calculating how much height a thumbnail will actually
+ * consume in the timeline, when performing scroll offset calculations
+ * (e.g. scroll locking)
+ */
+export function thumbHeight(fullWidth: number, fullHeight: number, thumbWidth: number, thumbHeight: number): number;
+export function thumbHeight(
+    fullWidth: number | undefined,
+    fullHeight: number | undefined,
+    thumbWidth: number,
+    thumbHeight: number,
+): null;
+export function thumbHeight(
+    fullWidth: number | undefined,
+    fullHeight: number | undefined,
+    thumbWidth: number,
+    thumbHeight: number,
+): number | null {
+    if (!fullWidth || !fullHeight) {
+        // Cannot calculate thumbnail height for image: missing w/h in metadata. We can't even
+        // log this because it's spammy
+        return null;
+    }
+    if (fullWidth < thumbWidth && fullHeight < thumbHeight) {
+        // no scaling needs to be applied
+        return fullHeight;
+    }
+    const widthMulti = thumbWidth / fullWidth;
+    const heightMulti = thumbHeight / fullHeight;
+    if (widthMulti < heightMulti) {
+        // width is the dominant dimension so scaling will be fixed on that
+        return Math.floor(widthMulti * fullHeight);
+    } else {
+        // height is the dominant dimension so scaling will be fixed on that
+        return Math.floor(heightMulti * fullHeight);
+    }
+}