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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,233 @@ | ||
| /* | ||
| MIT License | ||
| Copyright (c) 2022 Lonny Wong | ||
| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| SOFTWARE. | ||
| */ | ||
|
|
||
| package trzsz | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "errors" | ||
| "fmt" | ||
| "os" | ||
| "strings" | ||
| ) | ||
|
|
||
| func detectDragFiles(buf []byte) ([]string, bool) { | ||
| if IsLinux() { | ||
| return detectDragFilesOnLinux(buf) | ||
| } else if IsMacOS() { | ||
| return detectDragFilesOnMacOS(buf) | ||
| } else if IsWindows() { | ||
| return detectDragFilesOnWindows(buf) | ||
| } | ||
| return nil, false | ||
| } | ||
|
|
||
| func detectFilePath(path string, dragFiles *[]string, hasDir *bool) bool { | ||
| fileInfo, err := os.Stat(path) | ||
| if errors.Is(err, os.ErrNotExist) { | ||
| return false | ||
| } | ||
| if fileInfo.IsDir() { | ||
| *hasDir = true | ||
| *dragFiles = append(*dragFiles, path) | ||
| return true | ||
| } | ||
| if fileInfo.Mode().IsRegular() { | ||
| *dragFiles = append(*dragFiles, path) | ||
| return true | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| func detectDragFilesOnLinux(buf []byte) ([]string, bool) { | ||
| length := len(buf) | ||
| if length < 5 || buf[0] != '\'' || buf[1] != '/' || buf[length-1] != ' ' || buf[length-2] != '\'' { | ||
| return nil, false | ||
| } | ||
| hasDir := false | ||
| var dragFiles []string | ||
| paths := strings.Split(string(buf[1:length-2]), "' '") | ||
| for _, path := range paths { | ||
| if !detectFilePath(path, &dragFiles, &hasDir) { | ||
| return nil, false | ||
| } | ||
| } | ||
| return dragFiles, hasDir | ||
| } | ||
|
|
||
| func detectDragFilesOnMacOS(buf []byte) ([]string, bool) { | ||
| length := len(buf) | ||
| if length < 3 || buf[0] != '/' || buf[length-1] != ' ' || buf[length-2] == '\\' { | ||
| return nil, false | ||
| } | ||
| hasDir := false | ||
| var dragFiles []string | ||
| pathBuf := new(bytes.Buffer) | ||
| for i := 0; i < length; i++ { | ||
| if buf[i] == ' ' { | ||
| path := string(pathBuf.Bytes()) | ||
| if !detectFilePath(path, &dragFiles, &hasDir) { | ||
| return nil, false | ||
| } | ||
| pathBuf.Reset() | ||
| } else if buf[i] == '\\' { | ||
| i++ | ||
| if i < length { | ||
| pathBuf.WriteByte(buf[i]) | ||
| } | ||
| } else { | ||
| pathBuf.WriteByte(buf[i]) | ||
| } | ||
| } | ||
| if pathBuf.Len() != 0 { | ||
| return nil, false | ||
| } | ||
| return dragFiles, hasDir | ||
| } | ||
|
|
||
| func detectDragFilesOnWindows(buf []byte) ([]string, bool) { | ||
| length := len(buf) | ||
| if length < 4 { | ||
| return nil, false | ||
| } | ||
| hasDir := false | ||
| var dragFiles []string | ||
| if buf[length-1] == '"' && buf[0] >= 'A' && buf[0] <= 'Z' && buf[1] == ':' && buf[2] == '\\' && | ||
| bytes.IndexByte(buf[:length-1], '"') < 0 { | ||
| // Cmd & PowerShell may lost the first `"`, and supports one path only. | ||
| if detectFilePath(string(buf[:length-1]), &dragFiles, &hasDir) { | ||
| return dragFiles, hasDir | ||
| } | ||
| } | ||
| isWinPath, isMsysPath, isCygPath := false, false, false | ||
| if (buf[0] == '"' && buf[1] >= 'A' && buf[1] <= 'Z' && buf[2] == ':' && buf[3] == '\\') || | ||
| (buf[0] >= 'A' && buf[0] <= 'Z' && buf[1] == ':' && buf[2] == '\\') { | ||
| isWinPath = true | ||
| } else if (buf[0] == '\'' && buf[1] == '/' && buf[2] >= 'a' && buf[2] <= 'z' && buf[3] == '/') || | ||
| (buf[0] == '/' && buf[1] >= 'a' && buf[1] <= 'z' && buf[2] == '/') { | ||
| isMsysPath = true | ||
| } else if (length > 13 && string(buf[:11]) == "'/cygdrive/" && buf[11] >= 'a' && buf[11] <= 'z' && buf[12] == '/') || | ||
| (length > 12 && string(buf[:10]) == "/cygdrive/" && buf[10] >= 'a' && buf[10] <= 'z' && buf[11] == '/') { | ||
| isCygPath = true | ||
| } else { | ||
| return nil, false | ||
| } | ||
| var i int | ||
| var path string | ||
| for idx := 0; idx < length; idx += i { | ||
| if isWinPath { | ||
| path, i = nextWinPath(buf[idx:]) | ||
| } else if isMsysPath { | ||
| path, i = nextMsysPath(buf[idx:]) | ||
| } else if isCygPath { | ||
| path, i = nextCygPath(buf[idx:]) | ||
| } | ||
| if path == "" { | ||
| return nil, false | ||
| } | ||
| if !detectFilePath(path, &dragFiles, &hasDir) { | ||
| return nil, false | ||
| } | ||
| } | ||
| return dragFiles, hasDir | ||
| } | ||
|
|
||
| func nextWinPath(buf []byte) (string, int) { | ||
| length := len(buf) | ||
| if length < 4 { | ||
| return "", 0 | ||
| } | ||
| if buf[0] == '"' && buf[1] >= 'A' && buf[1] <= 'Z' && buf[2] == ':' && buf[3] == '\\' { | ||
| idx := bytes.IndexByte(buf[1:], '"') | ||
| if idx < 0 { | ||
| return "", 0 | ||
| } | ||
| idx++ | ||
| if idx+1 < length && buf[idx+1] != ' ' { | ||
| return "", 0 | ||
| } | ||
| return string(buf[1:idx]), idx + 2 | ||
| } else if buf[0] >= 'A' && buf[0] <= 'Z' && buf[1] == ':' && buf[2] == '\\' { | ||
| idx := bytes.IndexByte(buf, ' ') | ||
| if idx < 0 { | ||
| return string(buf), length | ||
| } | ||
| return string(buf[:idx]), idx + 1 | ||
| } | ||
| return "", 0 | ||
| } | ||
|
|
||
| func nextMsysPath(buf []byte) (string, int) { | ||
| length := len(buf) | ||
| if length < 4 { | ||
| return "", 0 | ||
| } | ||
| if buf[0] == '\'' && buf[1] == '/' && buf[2] >= 'a' && buf[2] <= 'z' && buf[3] == '/' { | ||
| idx := bytes.IndexByte(buf[1:], '\'') | ||
| if idx < 0 { | ||
| return "", 0 | ||
| } | ||
| idx++ | ||
| if idx+1 < length && buf[idx+1] != ' ' { | ||
| return "", 0 | ||
| } | ||
| return unixPathToWinPath(buf[1:idx]), idx + 2 | ||
| } else if buf[0] == '/' && buf[1] >= 'a' && buf[1] <= 'z' && buf[2] == '/' { | ||
| idx := bytes.IndexByte(buf, ' ') | ||
| if idx < 0 { | ||
| return unixPathToWinPath(buf), length | ||
| } | ||
| return unixPathToWinPath(buf[:idx]), idx + 1 | ||
| } | ||
| return "", 0 | ||
| } | ||
|
|
||
| func nextCygPath(buf []byte) (string, int) { | ||
| length := len(buf) | ||
| if length < 13 { | ||
| return "", 0 | ||
| } | ||
| if string(buf[:11]) == "'/cygdrive/" && buf[11] >= 'a' && buf[11] <= 'z' && buf[12] == '/' { | ||
| idx := bytes.IndexByte(buf[1:], '\'') | ||
| if idx < 0 { | ||
| return "", 0 | ||
| } | ||
| idx++ | ||
| if idx+1 < length && buf[idx+1] != ' ' { | ||
| return "", 0 | ||
| } | ||
| return unixPathToWinPath(buf[10:idx]), idx + 2 | ||
| } else if string(buf[:10]) == "/cygdrive/" && buf[10] >= 'a' && buf[10] <= 'z' && buf[11] == '/' { | ||
| idx := bytes.IndexByte(buf, ' ') | ||
| if idx < 0 { | ||
| return unixPathToWinPath(buf[9:]), length | ||
| } | ||
| return unixPathToWinPath(buf[9:idx]), idx + 1 | ||
| } | ||
| return "", 0 | ||
| } | ||
|
|
||
| func unixPathToWinPath(buf []byte) string { | ||
| return fmt.Sprintf("%c:%s", buf[1], strings.ReplaceAll(string(buf[2:]), "/", "\\")) | ||
| } |
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