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word_line_cache.go
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word_line_cache.go
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// Copyright (c) 2023 The Go-Curses Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package memphis
import (
"fmt"
"github.com/go-curses/cdk/log"
)
// TODO: Surface caching!
type CWordPage []WordLine
type WordLineCacheFn = func() []WordLine
type WordPageCache interface {
Hit(tag string, fn WordLineCacheFn) []WordLine
}
type CWordLineCache struct {
cache map[string]CWordPage
}
func NewWordPageCache() (wpc *CWordLineCache) {
return &CWordLineCache{
cache: make(map[string]CWordPage),
}
}
func (c *CWordLineCache) Clear() {
if len(c.cache) > 0 {
c.cache = make(map[string]CWordPage)
log.TraceF("WordLineCache.Clear(): cache purged")
}
}
func (c *CWordLineCache) Hit(tag string, fn WordLineCacheFn) (lines []WordLine) {
// if v, ok := c.cache[tag]; ok {
// // TraceF("WordLineCache.Hit(): returning cached value for \"%v\"", tag)
// return v
// }
// TraceF("WordLineCache.Hit(): caching new value for \"%v\"", tag)
// c.cache[tag] = fn()
// return c.cache[tag]
return fn()
}
func MakeTag(argv ...interface{}) (tag string) {
tag += "{"
for i, v := range argv {
if len(tag) > 1 {
tag += ";"
}
tag += fmt.Sprintf("%d=%v", i, v)
}
tag += "}"
return
}