public void showDiffDialog(@Nullable final BranchInfo branch) { if (branch == null) { GithubNotifications.showWarningDialog( myProject, "Can't Show Diff", "Target branch is not selected"); return; } DiffInfo info; try { info = GithubUtil.computeValueInModal( myProject, "Collecting diff data...", new ThrowableConvertor<ProgressIndicator, DiffInfo, IOException>() { @Override public DiffInfo convert(ProgressIndicator indicator) throws IOException { return GithubUtil.runInterruptable( indicator, new ThrowableComputable<DiffInfo, IOException>() { @Override public DiffInfo compute() throws IOException { return getDiffInfo(branch); } }); } }); } catch (IOException e) { GithubNotifications.showError(myProject, "Can't collect diff data", e); return; } if (info == null) { GithubNotifications.showErrorDialog(myProject, "Can't Show Diff", "Can't collect diff data"); return; } GitCompareBranchesDialog dialog = new GitCompareBranchesDialog( myProject, info.getTo(), info.getFrom(), info.getInfo(), myGitRepository, true); dialog.show(); }