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撤销和历史
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@sumneko
sumneko committed May 25, 2024
1 parent d8aa150 commit eb1fd0a
Showing 1 changed file with 121 additions and 20 deletions.
141 changes: 121 additions & 20 deletions src/console/client.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -70,40 +70,117 @@ class Pseudoterminal implements vscode.Pseudoterminal {

close() {};

private historyStack: string[] = [];
private historyIndex: number = 0;
private inputedBeforeHitEnter: string = '';

private saveHistory(data: string) {
let last = this.historyStack[this.historyStack.length - 1];
if (last === data) {
return;
}
this.historyStack.push(data);
if (this.historyStack.length > 100) {
this.historyStack.shift();
}
}

private lookLastHistory() {
if (this.historyStack.length === 0) {
return;
}
// 第一次按上箭头，要先临时保存当前的输入
if (this.historyIndex === 0) {
this.inputedBeforeHitEnter = this.inputedData;
}
if (this.historyIndex < this.historyStack.length) {
this.historyIndex++;
let data = this.historyStack[this.historyStack.length - this.historyIndex];
this.refreshLineWithoutUndo(data, data.length);
}
}

private lookNextHistory() {
if (this.historyIndex > 0) {
this.historyIndex--;
let data = this.historyStack[this.historyStack.length - this.historyIndex];
if (data) {
this.refreshLineWithoutUndo(data, data.length);
} else {
// 最后一次按下箭头，要恢复到原来的输入
this.refreshLineWithoutUndo(this.inputedBeforeHitEnter, this.inputedBeforeHitEnter.length);
}
}
}

private applyInput(data: string) {
this.saveHistory(data);
this.applyInputWithoutHistory(data);
}

private applyInputWithoutHistory(data: string) {
}

private inputedData: string = '';
private curOffset: number = 0;
private headPos = [0, 0];

private refreshLine(data: string) {
private undoStack: [string, number][] = [];
private undoIndex: number = 0;

private saveUndoStack() {
this.undoStack[this.undoIndex] = [this.inputedData, this.curOffset];
this.undoIndex++;
this.undoStack.splice(this.undoIndex);
if (this.undoStack.length > 100) {
this.undoStack.shift();
this.undoIndex--;
}
}

private refreshLine(data: string, offset: number) {
this.refreshLineWithoutUndo(data, offset);
this.saveUndoStack();
}

private refreshLineWithoutUndo(data: string, offset: number) {
this.moveCursor(0);
this.write(CSI.CLEAR_LINE);
this.inputedData = data;
this.write(data);
this.moveCursor(this.curOffset);
this.inputedData = data;
this.curOffset = offset;
this.moveCursor(offset);
}

private undo() {
if (this.undoIndex > 1) {
this.undoIndex--;
let [data, offset] = this.undoStack[this.undoIndex - 1];
this.refreshLineWithoutUndo(data, offset);
}
}

private redo() {
if (this.undoIndex < this.undoStack.length) {
this.undoIndex++;
let [data, offset] = this.undoStack[this.undoIndex - 1];
this.refreshLineWithoutUndo(data, offset);
}
}

handleInput(data: string): void {
if (data === '\r') { // 回车键
this.applyInput(this.inputedData);
this.inputedData = '';
this.curOffset = 0;
this.write('\r\n');
this.newStart();
return;
} else if (data === '\x7F') { // 删除前一个文字
if (this.curOffset > 0) {
this.refreshLine(this.inputedData.slice(0, this.curOffset - 1) + this.inputedData.slice(this.curOffset));
this.curOffset -= 1;
this.moveCursor(this.curOffset);
this.refreshLine(this.inputedData.slice(0, this.curOffset - 1) + this.inputedData.slice(this.curOffset), this.curOffset - 1);
}
return;
} else if (data === '\x1B') { // ESC键
this.refreshLine('');
this.curOffset = 0;
this.moveCursor(this.curOffset);
this.refreshLine('', 0);
return;
} else if (data === '\x03') { // Ctrl+C
vscode.env.clipboard.writeText(this.inputedData);
Expand All @@ -113,6 +190,17 @@ class Pseudoterminal implements vscode.Pseudoterminal {
this.handleCommonInput(text);
});
return;

} else if (data === '\x18') { // Ctrl+X
vscode.env.clipboard.writeText(this.inputedData);
this.refreshLine('', 0);
return;
} else if (data === '\x1A') { // Ctrl+Z
this.undo();
return;
} else if (data === '\x19') { // Ctrl+Y
this.redo();
return;
}

if (data.startsWith('\x1B[')) {
Expand All @@ -130,18 +218,14 @@ class Pseudoterminal implements vscode.Pseudoterminal {
switch (func) {
case '~': // 一些特殊键
if (args[0] === 3) { // 删除键
this.refreshLine(this.inputedData.slice(0, this.curOffset) + this.inputedData.slice(this.curOffset + 1));
} else if (args[0] === 1) { // Home键
this.curOffset = 0;
this.moveCursor(this.curOffset);
} else if (args[0] === 4) { // End键
this.curOffset = this.inputedData.length;
this.moveCursor(this.curOffset);
this.refreshLine(this.inputedData.slice(0, this.curOffset) + this.inputedData.slice(this.curOffset + 1), this.curOffset);
}
break;
case 'A': // 上箭头
this.lookLastHistory();
break;
case 'B': // 下箭头
this.lookNextHistory();
break;
case 'C': // 右箭头
if (this.curOffset < this.inputedData.length) {
Expand All @@ -155,6 +239,14 @@ class Pseudoterminal implements vscode.Pseudoterminal {
this.moveCursor(this.curOffset);
}
break;
case 'F': // End 键
this.curOffset = this.inputedData.length;
this.moveCursor(this.curOffset);
break;
case 'H': // Home 键
this.curOffset = 0;
this.moveCursor(this.curOffset);
break;
case 'R': // 光标位置回应
this.responseCursorPos(args[0], args[1]);
break;
Expand All @@ -164,10 +256,14 @@ class Pseudoterminal implements vscode.Pseudoterminal {
}

private handleCommonInput(data: string) {
// 如果是单个的不可见字符，直接忽略
if (data.length === 1 && data.charCodeAt(0) < 32) {
return;
}
data = data.replace(/[^\x20-\x7E\u4E00-\u9FA5]/g, ' ');
let newData = this.inputedData.slice(0, this.curOffset) + data + this.inputedData.slice(this.curOffset);
this.curOffset += data.length;
this.refreshLine(newData);
this.refreshLine(newData, this.curOffset + data.length);
this.historyIndex = 0;
}

private moveCursor(offset: number) {
Expand All @@ -179,8 +275,13 @@ class Pseudoterminal implements vscode.Pseudoterminal {

private newStart() {
this.write(`${CSI.GREEN}>${CSI.RESET_COLOR}`);
this.undoStack.splice(0);
this.undoIndex = 0;
this.historyIndex = 0;
this.inputedBeforeHitEnter = '';
this.requestCursorPos((row, col) => {
this.headPos = [row, col];
this.refreshLine('', 0);
});
}

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