feat: add sheet creation command

CHANGELOG.md

@@ -7,6 +7,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.0] - 2026-03-10
+
+### Added
+
+- Added `:addsheet <name>` to create a new sheet after the current sheet
+- Added undo and redo support for sheet creation
+
+### Fixed
+
+- Load all lazy-loaded sheets before saving to avoid writing unloaded sheets as blank
+- Count sheet name length by characters so non-ASCII names such as Chinese sheet names are validated correctly
+
 ## [0.3.0] - 2025-05-07
 
 ### Added
@@ -74,7 +86,8 @@ This is the initial release of excel-cli, a lightweight terminal-based Excel vie
 - Copy, cut, and paste functionality with `y`, `d`, and `p` keys
 - Support for pipe operator when exporting to JSON
 
-[Unreleased]: https://github.com/fuhan666/excel-cli/compare/v0.3.0...HEAD
+[Unreleased]: https://github.com/fuhan666/excel-cli/compare/v0.4.0...HEAD
+[0.4.0]: https://github.com/fuhan666/excel-cli/releases/tag/v0.4.0
 [0.3.0]: https://github.com/fuhan666/excel-cli/releases/tag/v0.3.0
 [0.2.0]: https://github.com/fuhan666/excel-cli/releases/tag/v0.2.0
 [0.1.1]: https://github.com/fuhan666/excel-cli/releases/tag/v0.1.1

README.md

@@ -7,10 +7,10 @@ English | [中文](README_zh.md)
 ## Features
 
 - Browse and navigate Excel worksheets with Vim-like hotkeys
-- Switch between sheets in multi-sheet workbooks
+- Create, switch, and delete sheets in multi-sheet workbooks
 - Edit cell contents directly in the terminal
 - Export data to JSON format
-- Delete rows, columns, and sheets
+- Delete rows and columns
 - Search functionality with highlighting
 - Command mode for advanced operations
 
@@ -105,7 +105,7 @@ The application has a simple and intuitive interface:
 - `y`: Copy current cell content
 - `d`: Cut current cell content
 - `p`: Paste clipboard content to current cell
-- `u`: Undo the last operation (edit, row/column/sheet deletion)
+- `u`: Undo the last operation (edit, row/column changes, sheet creation/deletion)
 - `Ctrl+r`: Redo the last undone operation
 - `/`: Start forward search
 - `?`: Start backward search
@@ -218,6 +218,7 @@ The JSON files are saved in the same directory as the original Excel file.
 
 ### Sheet Management Commands
 
+- `:addsheet [name]` - Add a new sheet after the current sheet
 - `:sheet [name/number]` - Switch to sheet by name or index (1-based)
 - `:delsheet` - Delete the current sheet
 
@@ -241,6 +242,7 @@ Excel-CLI uses a non-destructive approach to file saving:
 
 - When you save a file (using `:w`, `:wq`, or `:x`), the application checks if any changes have been made
 - If no changes have been made, no new file is created, and a "No changes to save" message is displayed
+- If lazy loading is enabled, all unloaded sheets are loaded before saving so the workbook content is preserved
 - If changes have been made, a new file is created with a timestamp in the filename, following the format `original_filename_YYYYMMDD_HHMMSS.xlsx`
 - The new file is created without any styling
 - The original file is never modified

README_zh.md

@@ -7,10 +7,10 @@
 ## 功能特点
 
 - 使用类 Vim 快捷键浏览 Excel 工作表
-- 在多工作表的 Excel 文件中切换工作表
+- 在多工作表的 Excel 文件中创建、切换和删除工作表
 - 直接在终端中编辑单元格内容
 - 将数据导出为 JSON 格式
-- 删除行、列和工作表
+- 删除行和列
 - 搜索并高亮显示结果
 - 支持高级操作的命令模式
 
@@ -105,7 +105,7 @@ excel-cli path/to/your/file.xlsx -j > data.json # （示例）将JSON输出保
 - `y`：复制当前单元格内容
 - `d`：剪切当前单元格内容
 - `p`：将剪贴板内容粘贴到当前单元格
-- `u`：撤销上一次操作（编辑、行/列/工作表删除）
+- `u`：撤销上一次操作（编辑、行列变更、工作表创建/删除）
 - `Ctrl+r`：重做上一次被撤销的操作
 - `/`：开始向前搜索
 - `?`：开始向后搜索
@@ -218,6 +218,7 @@ JSON 文件保存在原始 Excel 文件所在的目录中。
 
 ### 工作表管理命令
 
+- `:addsheet [名称]` - 在当前工作表后新增一个工作表
 - `:sheet [名称/编号]` - 按名称或索引切换工作表（基于 1 的索引）
 - `:delsheet` - 删除当前工作表
 
@@ -241,6 +242,7 @@ Excel-CLI 使用非破坏性的文件保存方法：
 
 - 当您保存文件（使用`:w`，`:wq`或`:x`）时，应用程序会检查是否进行了任何更改
 - 如果没有进行更改，则不会创建新文件，并显示"No changes to save"消息
+- 如果启用了懒加载，保存前会先加载尚未读取的工作表，以保留完整工作簿内容
 - 如果进行了更改，则会创建一个文件名中带有时间戳的新文件，格式为`original_filename_YYYYMMDD_HHMMSS.xlsx`
 - 创建的新文件不带任何样式
 - 原始文件永远不会被修改

src/actions/command.rs

@@ -1,4 +1,5 @@
-use super::types::{ActionCommand, ActionType};
+use super::types::ActionCommand;
+use super::{ActionType, Command};
 
 impl ActionCommand {
     // Returns the action type of this command
@@ -13,7 +14,7 @@ impl ActionCommand {
             ActionCommand::MultiRow(_) => ActionType::DeleteMultiRows,
             ActionCommand::Column(_) => ActionType::DeleteColumn,
             ActionCommand::MultiColumn(_) => ActionType::DeleteMultiColumns,
-            ActionCommand::Sheet(_) => ActionType::DeleteSheet,
+            ActionCommand::Sheet(action) => action.action_type(),
         }
     }
 }

src/actions/mod.rs

@@ -10,5 +10,5 @@ pub use cell::CellAction;
 pub use column::{ColumnAction, MultiColumnAction};
 pub use history::UndoHistory;
 pub use row::{MultiRowAction, RowAction};
-pub use sheet::SheetAction;
+pub use sheet::{SheetAction, SheetOperation};
 pub use types::{ActionCommand, ActionExecutor, ActionType, Command};

src/actions/sheet.rs

@@ -2,12 +2,19 @@ use super::{ActionType, Command};
 use crate::excel::Sheet;
 use anyhow::Result;
 
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum SheetOperation {
+    Create,
+    Delete,
+}
+
 #[derive(Clone)]
 pub struct SheetAction {
     pub sheet_index: usize,
     pub sheet_name: String,
     pub sheet_data: Sheet,
     pub column_widths: Vec<usize>,
+    pub operation: SheetOperation,
 }
 
 impl Command for SheetAction {
@@ -20,6 +27,9 @@ impl Command for SheetAction {
     }
 
     fn action_type(&self) -> ActionType {
-        ActionType::DeleteSheet
+        match self.operation {
+            SheetOperation::Create => ActionType::CreateSheet,
+            SheetOperation::Delete => ActionType::DeleteSheet,
+        }
     }
 }

src/actions/types.rs

@@ -3,6 +3,7 @@ pub enum ActionType {
     Edit,
     Cut,
     Paste,
+    CreateSheet,
     DeleteRow,
     DeleteColumn,
     DeleteSheet,

src/app/sheet.rs

@@ -1,5 +1,6 @@
 use crate::actions::{
     ActionCommand, ColumnAction, MultiColumnAction, MultiRowAction, RowAction, SheetAction,
+    SheetOperation,
 };
 use crate::app::AppState;
 use crate::utils::index_to_col_name;
@@ -150,6 +151,56 @@ impl AppState<'_> {
         self.add_notification(format!("Sheet '{name_or_index}' not found"));
     }
 
+    pub fn create_sheet(&mut self, name: &str) {
+        let insert_index = self.workbook.get_current_sheet_index() + 1;
+
+        match self.workbook.add_sheet(name, insert_index) {
+            Ok(sheet_name) => {
+                let default_width = 15;
+                let max_cols = self
+                    .workbook
+                    .get_sheet_by_index(insert_index)
+                    .map(|sheet| sheet.max_cols)
+                    .unwrap_or(1);
+
+                self.sheet_column_widths
+                    .insert(sheet_name.clone(), vec![default_width; max_cols + 1]);
+                self.sheet_cell_positions.insert(
+                    sheet_name.clone(),
+                    crate::app::CellPosition {
+                        selected: (1, 1),
+                        view: (1, 1),
+                    },
+                );
+
+                if let Err(e) = self.switch_sheet_by_index(insert_index) {
+                    self.sheet_column_widths.remove(&sheet_name);
+                    self.sheet_cell_positions.remove(&sheet_name);
+                    let _ = self.workbook.delete_sheet_at_index(insert_index);
+                    self.add_notification(format!("Failed to switch to new sheet: {e}"));
+                    return;
+                }
+
+                self.notification_messages.pop();
+
+                let sheet_action = SheetAction {
+                    sheet_index: insert_index,
+                    sheet_name: sheet_name.clone(),
+                    sheet_data: self.workbook.get_current_sheet().clone(),
+                    column_widths: self.column_widths.clone(),
+                    operation: SheetOperation::Create,
+                };
+
+                self.undo_history.push(ActionCommand::Sheet(sheet_action));
+                self.input_mode = crate::app::InputMode::Normal;
+                self.add_notification(format!("Created sheet: {sheet_name}"));
+            }
+            Err(e) => {
+                self.add_notification(format!("Failed to add sheet: {e}"));
+            }
+        }
+    }
+
     pub fn delete_current_sheet(&mut self) {
         let current_sheet_name = self.workbook.get_current_sheet_name();
         let sheet_index = self.workbook.get_current_sheet_index();
@@ -166,6 +217,7 @@ impl AppState<'_> {
                     sheet_name: current_sheet_name.clone(),
                     sheet_data,
                     column_widths,
+                    operation: SheetOperation::Delete,
                 };
 
                 self.undo_history.push(ActionCommand::Sheet(sheet_action));
@@ -210,6 +262,7 @@ impl AppState<'_> {
                 // Clear search results as they're specific to the previous sheet
                 self.search_results.clear();
                 self.current_search_idx = None;
+                self.update_row_number_width();
 
                 // Check if the new current sheet is loaded when using lazy loading
                 if self.workbook.is_lazy_loading() && !is_new_sheet_loaded {
@@ -722,3 +775,31 @@ impl AppState<'_> {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::app::AppState;
+    use crate::excel::{Sheet, Workbook};
+    use std::path::PathBuf;
+
+    #[test]
+    fn create_sheet_can_be_undone_and_redone() {
+        let workbook = Workbook::from_sheets_for_test(vec![Sheet::blank("Sheet1".to_string())]);
+        let mut app = AppState::new(workbook, PathBuf::from("test.xlsx")).unwrap();
+
+        app.create_sheet("Report");
+        assert_eq!(app.workbook.get_sheet_names(), vec!["Sheet1", "Report"]);
+        assert_eq!(app.workbook.get_current_sheet_name(), "Report");
+        assert!(app.workbook.is_modified());
+
+        app.undo().unwrap();
+        assert_eq!(app.workbook.get_sheet_names(), vec!["Sheet1"]);
+        assert_eq!(app.workbook.get_current_sheet_name(), "Sheet1");
+        assert!(!app.workbook.is_modified());
+
+        app.redo().unwrap();
+        assert_eq!(app.workbook.get_sheet_names(), vec!["Sheet1", "Report"]);
+        assert_eq!(app.workbook.get_current_sheet_name(), "Report");
+        assert!(app.workbook.is_modified());
+    }
+}

src/app/ui.rs

@@ -54,6 +54,7 @@ impl AppState<'_> {
                                 h=horizontal (default), v=vertical\n\
                                 [rows]=number of header rows (default: 1)\n\n\
              SHEET OPERATIONS:\n\
+             :addsheet [name] - Add a new sheet after the current sheet\n\
              :delsheet   - Delete the current sheet\n\n\
              UI ADJUSTMENTS:\n\
              +/=         - Increase info panel height\n\