github.com/inspektor-gadget/inspektor-gadget@v0.28.1/pkg/columns/formatter/textcolumns/helpers.go (about)

     1  // Copyright 2022 The Inspektor Gadget authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package textcolumns
    16  
    17  import "strings"
    18  
    19  // buildFillString builds a string that has the length of the widest column; it is used to copy
    20  // whitespace from, instead of generating it character by character all the time
    21  func (tf *TextColumnsFormatter[T]) buildFillString() {
    22  	maxLength := 0
    23  	for _, column := range tf.showColumns {
    24  		if column.calculatedWidth > maxLength {
    25  			maxLength = column.calculatedWidth
    26  		}
    27  	}
    28  
    29  	var s strings.Builder
    30  	for i := 0; i < maxLength; i++ {
    31  		s.WriteString(" ")
    32  	}
    33  	tf.fillString = s.String()
    34  }