63 lines
1.9 KiB
Go
63 lines
1.9 KiB
Go
// Fenrir console screen reader.
|
|
// Copyright (c) 2026 Storm Dragon
|
|
// SPDX-License-Identifier: GPL-3.0-or-later
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify it
|
|
// under the terms of the GNU General Public License as published by the Free
|
|
// Software Foundation, either version 3 of the License, or (at your option)
|
|
// any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful, but WITHOUT
|
|
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
// more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License along with
|
|
// this program. If not, see <https://www.gnu.org/licenses/gpl-3.0.html>.
|
|
|
|
package reader
|
|
|
|
import (
|
|
"strings"
|
|
|
|
"git.stormux.org/storm/fenrir/internal/presentation"
|
|
"git.stormux.org/storm/fenrir/internal/screen"
|
|
)
|
|
|
|
// Track newly emphasized spans, excluding the formerly selected row returning
|
|
// to its common appearance. No attributes means no highlight evidence.
|
|
func highlights(previous, next screen.Snapshot) []presentation.Message {
|
|
if len(previous.Attributes) != len(next.Cells) || len(next.Attributes) != len(next.Cells) {
|
|
return nil
|
|
}
|
|
counts := make(map[screen.Attribute]int)
|
|
for _, attribute := range next.Attributes {
|
|
counts[attribute]++
|
|
}
|
|
var result []presentation.Message
|
|
for row := range next.Rows {
|
|
start := -1
|
|
flush := func(end int) {
|
|
if start >= 0 {
|
|
if text := strings.TrimSpace(string(next.Line(row)[start:end])); text != "" {
|
|
result = append(result, presentation.Message{Text: text})
|
|
}
|
|
start = -1
|
|
}
|
|
}
|
|
for col := range next.Cols {
|
|
index := row*next.Cols + col
|
|
before, after := previous.Attributes[index], next.Attributes[index]
|
|
if before != after && counts[after] < counts[before] {
|
|
if start < 0 {
|
|
start = col
|
|
}
|
|
} else {
|
|
flush(col)
|
|
}
|
|
}
|
|
flush(next.Cols)
|
|
}
|
|
return result
|
|
}
|