forked from mystiq/hydrogen-web
14ed5fd1e8
Mobile Safari seems to be the only browser that does *not* resize the viewport when the keyboard shows and hides. Instead the window is moved to make room for the keyboard which moves content at the top off screen. This uses the VisualViewport API to manually resize the `SessionView` in response to keyboard display events. Additionally, if a DOM element exists that has the `bottom-aligned-scroll` CSS class, its scroll position is retained. Currently this only applies to the `Timeline`. Note that the VisualViewport API was only introduced with iOS 13. According to [statista.com], versions below 13 made up for 19% of all iOS users in summer 2020, with the share continuing to fall off. As a result, this seems like an acceptable workaround. Fixes: #181 [statista.com]: https://www.statista.com/statistics/565270/apple-devices-ios-version-share-worldwide/ Signed-off-by: Johannes Marbach <n0-0ne+github@mailbox.org>
54 lines
2 KiB
JavaScript
54 lines
2 KiB
JavaScript
/*
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Copyright 2020 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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export async function downloadInIframe(container, iframeSrc, blobHandle, filename, isIOS) {
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let iframe = container.querySelector("iframe.downloadSandbox");
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if (!iframe) {
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iframe = document.createElement("iframe");
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iframe.setAttribute("sandbox", "allow-scripts allow-downloads allow-downloads-without-user-activation");
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iframe.setAttribute("src", iframeSrc);
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iframe.className = "hidden downloadSandbox";
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container.appendChild(iframe);
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let detach;
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await new Promise((resolve, reject) => {
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detach = () => {
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iframe.removeEventListener("load", resolve);
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iframe.removeEventListener("error", reject);
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}
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iframe.addEventListener("load", resolve);
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iframe.addEventListener("error", reject);
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});
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detach();
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}
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if (isIOS) {
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// iOS can't read a blob in a sandboxed iframe,
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// see https://github.com/vector-im/hydrogen-web/issues/244
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const buffer = await blobHandle.readAsBuffer();
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iframe.contentWindow.postMessage({
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type: "downloadBuffer",
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buffer,
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mimeType: blobHandle.mimeType,
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filename: filename
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}, "*");
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} else {
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iframe.contentWindow.postMessage({
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type: "downloadBlob",
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blob: blobHandle.nativeBlob,
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filename: filename
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}, "*");
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}
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}
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