mirror of https://github.com/pulumi/pulumi.git
43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
// Copyright 2016-2022, Pulumi Corporation.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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// Terminal detection utilities.
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package main
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import "golang.org/x/term"
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type optimalPageSizeOpts struct {
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nopts int
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terminalHeight int
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}
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// Computes how many options to display in a Terminal UI multi-select.
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// Tries to auto-detect and take terminal height into account.
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func optimalPageSize(opts optimalPageSizeOpts) int {
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pageSize := 15
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if opts.terminalHeight != 0 {
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pageSize = opts.terminalHeight
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} else if _, height, err := term.GetSize(0); err == nil {
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pageSize = height
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}
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if pageSize > opts.nopts {
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pageSize = opts.nopts
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}
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const buffer = 5
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if pageSize > buffer {
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pageSize = pageSize - buffer
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}
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return pageSize
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}
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