### Plugin Settings Configuration Example

Source: https://context7.com/jesse-r-s-hines/obsidian-open-tab-settings/llms.txt

Demonstrates how to define and update settings for the Open Tab Settings plugin. Settings include options for opening files in new tabs, deduplicating tabs, and customizing tab placement. These settings are persisted to disk.

```typescript
import OpenTabSettingsPlugin from './main';
import { OpenTabSettingsPluginSettings, DEFAULT_SETTINGS } from './settings';

// Default settings structure
const DEFAULT_SETTINGS: OpenTabSettingsPluginSettings = {
    openInNewTab: true,              // Open files in new tabs by default
    deduplicateTabs: true,           // Switch to existing tabs instead of duplicating
    openInSameTabOnModClick: false,  // Ctrl/middle-click opens in same tab
    newTabPlacement: "after-active", // Where to place new tabs
    newTabTabGroupPlacement: "same", // Which pane to use in split view
};

// Update settings programmatically
class ExamplePlugin extends Plugin {
    settings: OpenTabSettingsPluginSettings;

    async updateTabSettings() {
        // Load current settings
        await this.loadSettings();

        // Update specific settings
        await this.updateSettings({
            openInNewTab: true,
            deduplicateTabs: false
        });

        // Settings are automatically persisted to data.json
        console.log('Settings updated:', this.settings);
    }
}
```

--------------------------------

### Example: Demonstrating Tab Deduplication Behavior (TypeScript)

Source: https://context7.com/jesse-r-s-hines/obsidian-open-tab-settings/llms.txt

This example demonstrates the tab deduplication functionality. The first `openFile` call for a given file creates a new tab. The second `openFile` call for the same file, with deduplication enabled, switches focus to the existing tab instead of creating a duplicate.

```typescript
// Example: Deduplication behavior
const file = app.vault.getAbstractFileByPath('existing.md');

// First open - creates new tab
const leaf1 = app.workspace.getLeaf('tab');
await leaf1.openFile(file); // Opens in new tab

// Second open with deduplication enabled - switches to existing
const leaf2 = app.workspace.getLeaf('tab');
await leaf2.openFile(file); // Switches to leaf1 instead of creating duplicate

```

--------------------------------

### Update Plugin Settings for Tab Placement (JavaScript)

Source: https://context7.com/jesse-r-s-hines/obsidian-open-tab-settings/llms.txt

These JavaScript examples demonstrate how to interact with the Obsidian Open Tab Settings plugin to modify its configuration for new tab placement. The `updateSettings` method is used to change properties like `newTabPlacement` and `newTabTabGroupPlacement`. These changes affect how subsequent calls to `app.workspace.getLeaf('tab')` will position the new tab.

```javascript
// Example: Different placement configurations
const plugin = app.plugins.getPlugin('open-tab-settings');

// Place new tabs at the end of tab bar
await plugin.updateSettings({ newTabPlacement: "end" });
const leaf1 = app.workspace.getLeaf('tab'); // Opens at end

// Place new tabs after active tab (default)
await plugin.updateSettings({ newTabPlacement: "after-active" });
const leaf2 = app.workspace.getLeaf('tab'); // Opens next to current

// Open new tabs in opposite split pane
await plugin.updateSettings({ newTabTabGroupPlacement: "opposite" });
const leaf3 = app.workspace.getLeaf('tab'); // Opens in other pane
```

--------------------------------

### Workspace.getLeaf Monkey Patch for Tab Control

Source: https://context7.com/jesse-r-s-hines/obsidian-open-tab-settings/llms.txt

Illustrates the core functionality of the plugin, which involves monkey-patching Obsidian's `Workspace.getLeaf()` method. This patch intercepts tab creation requests to apply custom logic based on plugin settings, such as opening files in new tabs, preventing duplicates, or controlling placement.

```typescript
import * as monkeyAround from 'monkey-around';
import { Workspace, WorkspaceLeaf, PaneType } from 'obsidian';

// Register the monkey patch
this.register(monkeyAround.around(Workspace.prototype, {
    getLeaf(oldMethod: any) {
        return function(this: Workspace, newLeaf?: PaneType|boolean, ...args) {
            const plugin = this; // Reference to OpenTabSettingsPlugin
            const activeLeaf = plugin.app.workspace.getActiveViewOfType(View)?.leaf;

            // Determine if this is a default new tab request
            const isDefaultNewTab = plugin.settings.openInNewTab && !newLeaf;

            // Resolve newLeaf to enum based on settings
            let leaf: WorkspaceLeaf;
            if (newLeaf == 'tab' || (plugin.settings.openInNewTab && !newLeaf)) {
                // Create new tab using custom placement logic
                leaf = plugin.getNewLeaf();

                // Focus new tab if configured or default click
                if (plugin.app.vault.getConfig('focusNewTab') || isDefaultNewTab) {
                    plugin.app.workspace.setActiveLeaf(leaf);
                }
            } else {
                // Use Obsidian's default behavior
                leaf = oldMethod.call(this, newLeaf, ...args);
            }

            // Track metadata for deduplication logic
            leaf.openTabSettingsLastOpenType = newLeaf || 'default';
            leaf.openTabSettingsOpenedFrom = activeLeaf?.id;

            return leaf;
        }
    }
}));

// Example: Opening a file with different behaviors
const file = app.vault.getAbstractFileByPath('note.md');

// Open in new tab (when openInNewTab is true)
const newTabLeaf = app.workspace.getLeaf('tab');
await newTabLeaf.openFile(file);

// Open in same tab (override default behavior)
const sameTabLeaf = app.workspace.getLeaf('same');
await sameTabLeaf.openFile(file);

// Open to the right
const rightLeaf = app.workspace.getLeaf('split');
await rightLeaf.openFile(file);
```

--------------------------------

### Custom New Tab Placement Logic (TypeScript)

Source: https://context7.com/jesse-r-s-hines/obsidian-open-tab-settings/llms.txt

The `getNewLeaf()` method within the `OpenTabSettingsPlugin` class provides custom logic for determining where new tabs should be created. It considers various settings for tab group placement (e.g., 'same', 'opposite', 'first', 'last' in split panes) and tab position within a group (e.g., 'after-pinned', 'beginning', 'end', 'after-active'). The method aims to reuse existing empty tabs when possible before creating new ones. It relies on internal Obsidian API elements like `WorkspaceLeaf`, `TabGroup`, `Platform`, and helper functions like `isEmptyLeaf`.

```typescript
class OpenTabSettingsPlugin extends Plugin {
    private getNewLeaf(): WorkspaceLeaf {
        const activeLeaf = this.app.workspace.getMostRecentLeaf();
        if (!activeLeaf) throw new Error("No tab group found.");

        const activeTabGroup = activeLeaf.parent;
        const activeIndex = activeTabGroup.children.indexOf(activeLeaf);

        // Reuse empty tabs instead of creating new ones
        if (isEmptyLeaf(activeLeaf)) {
            return activeLeaf;
        }

        let group: TabGroup|undefined;
        let index: number|undefined;

        // Determine which tab group to use in split view
        if (this.settings.newTabTabGroupPlacement != "same" && !Platform.isPhone) {
            const tabGroups = this.getAllTabGroups(activeLeaf.getRoot());
            const otherTabGroup = tabGroups.filter(g => g !== activeTabGroup).at(-1);

            switch (this.settings.newTabTabGroupPlacement) {
                case "opposite":
                    group = otherTabGroup || activeTabGroup;
                    break;
                case "first":
                    group = tabGroups[0];
                    break;
                case "last":
                    group = tabGroups.at(-1)!;
                    break;
            }
        }
        group = group || activeTabGroup;

        // Determine index within the tab group
        if (group == activeTabGroup) {
            switch (this.settings.newTabPlacement) {
                case "after-pinned":
                    // Place after pinned tabs
                    const nextUnpinned = group.children.findIndex((l, i) =>
                        !l.pinned && i > activeIndex
                    );
                    index = nextUnpinned < 0 ? group.children.length : nextUnpinned;
                    break;
                case "beginning":
                    index = 0;
                    break;
                case "end":
                    index = group.children.length;
                    break;
                default: // "after-active"
                    index = activeIndex + 1;
            }
        } else {
            index = this.settings.newTabPlacement == "beginning"
                ? 0
                : group.children.length;
        }

        // Reuse empty tab at target position if available
        const leafToDisplace = group.children[Math.min(index, group.children.length - 1)];
        if (isEmptyLeaf(leafToDisplace)) {
            return leafToDisplace;
        }

        // Create new leaf and insert at calculated position
        const newLeaf = new (WorkspaceLeaf as any)(this.app);
        group.insertChild(index, newLeaf);

        return newLeaf;
    }
}
```

--------------------------------

### Find Matching Workspace Leaves - TypeScript

Source: https://context7.com/jesse-r-s-hines/obsidian-open-tab-settings/llms.txt

Implements the `findMatchingLeaves` method to locate all `WorkspaceLeaf` instances currently displaying a given `TFile`. It filters leaves based on file path, view type compatibility, and ensures they are in the main workspace area, excluding sidebars.

```typescript
class OpenTabSettingsPlugin extends Plugin {
    private findMatchingLeaves(file: TFile): WorkspaceLeaf[] {
        const matches: WorkspaceLeaf[] = [];

        this.app.workspace.iterateAllLeaves(leaf => {
            // Check if file path matches
            const isFileMatch = leaf.getViewState()?.state?.file == file.path;

            // Only match basic file views, not auxiliary views like outgoing-links
            const viewType = leaf.view.getViewType();
            const isTypeMatch = (
                this.app.viewRegistry.getTypeByExtension(file.extension) == viewType ||
                PLUGIN_VIEW_TYPES[file.extension]?.includes(viewType)
            );

            // Only consider tabs in main area (not sidebars)
            if (isMainLeaf(leaf) && isFileMatch && isTypeMatch) {
                matches.push(leaf);
            }
        });

        return matches;
    }
}

// Example: Finding and managing duplicate tabs
const file = app.vault.getAbstractFileByPath('note.md');
const plugin = app.plugins.getPlugin('open-tab-settings');
const matches = plugin.findMatchingLeaves(file);

console.log(`File is open in ${matches.length} tabs`);

// Close all but first tab
for (let i = 1; i < matches.length; i++) {
    matches[i].detach();
}

// Or switch to first existing tab
if (matches.length > 0) {
    app.workspace.setActiveLeaf(matches[0]);
}
```

--------------------------------

### Intercept File Opening to Prevent Duplicate Tabs (TypeScript)

Source: https://context7.com/jesse-r-s-hines/obsidian-open-tab-settings/llms.txt

This TypeScript code patches the `WorkspaceLeaf.prototype.openFile` method to enable tab deduplication. It checks if the file is already open and, if so, switches to the existing tab instead of creating a new one. This functionality is controlled by plugin settings and considers different opening contexts, such as internal link navigation.

```typescript
import { WorkspaceLeaf, TFile } from 'obsidian';
import * as monkeyAround from 'monkey-around';

this.register(monkeyAround.around(WorkspaceLeaf.prototype, {
    openFile(oldMethod: any) {
        return async function(this: WorkspaceLeaf, file: TFile, openState, ...args) {
            const plugin = this; // Reference to OpenTabSettingsPlugin

            // Find all leaves displaying this file
            const matches = plugin.findMatchingLeaves(file);
            const lastOpenType = this.openTabSettingsLastOpenType;
            const lastOpenedFrom = this.openTabSettingsOpenedFrom;

            // Check if this is a special open (new window, sidebar, etc.)
            const isSpecialOpen = (!isMainLeaf(this) || (
                isEmptyLeaf(this) &&
                !['same', 'tab', 'default'].includes(lastOpenType ?? 'unknown')
            ));

            // Detect internal link navigation (heading/block links)
            const isInternalLink = (
                isEmptyLeaf(this) &&
                !!openState?.eState?.subpath &&
                matches.some(l => l.id == lastOpenedFrom)
            );

            let match: WorkspaceLeaf|undefined;

            if (plugin.settings.openInNewTab && isInternalLink && !isSpecialOpen) {
                // Internal links always deduplicate to parent tab
                match = matches.find(l => l.id == lastOpenedFrom);
            } else if (plugin.settings.deduplicateTabs && !isSpecialOpen &&
                       matches.length > 0 && !matches.includes(this)) {
                // Switch to first existing tab
                match = matches[0];
            }

            if (match) {
                // Reuse existing tab instead of opening duplicate
                await oldMethod.call(match, file, {
                    ...openState,
                    active: !!openState?.active || activeLeaf == this,
                }, ...args);

                // Close empty leaf that was going to be used
                if (isEmptyLeaf(this) && this.parent.children.length > 1) {
                    this.detach();
                }
            } else {
                // Open normally
                await oldMethod.call(this, file, openState, ...args);
            }
        }
    }
}));

```

--------------------------------

### Add 'Open in Same Tab' Context Menu Item - TypeScript

Source: https://context7.com/jesse-r-s-hines/obsidian-open-tab-settings/llms.txt

Adds a context menu item to file menus that allows users to explicitly open a file in the current tab. This overrides the 'always open in new tab' setting for that specific action. It uses the `file-menu` event and `registerEvent` API.

```typescript
class OpenTabSettingsPlugin extends Plugin {
    async onload() {
        this.registerEvent(
            this.app.workspace.on("file-menu", (menu, file, source, leaf) => {
                if (file instanceof TFile) {
                    menu.addItem((item) => {
                        item.setSection("open");
                        item.setIcon("file-minus");
                        item.setTitle("Open in same tab");
                        item.onClick(async () => {
                            // Force open in same tab, bypassing openInNewTab setting
                            await this.app.workspace.getLeaf('same' as PaneType)
                                .openFile(file);
                        });
                    });
                }
            })
        );
    }
}

// Example: Context menu usage
// Right-click on any file in file explorer or tab header
// Select "Open in same tab" to open without creating new tab
// This works even when "Always open in new tab" setting is enabled
```

--------------------------------

### Register Commands for Tab Settings - TypeScript

Source: https://context7.com/jesse-r-s-hines/obsidian-open-tab-settings/llms.txt

Registers toggle, enable, and disable commands for 'always open in new tab' and 'prevent duplicate tabs' settings. These commands can be invoked via the command palette or hotkeys. They update the plugin's settings based on user interaction.

```typescript
class OpenTabSettingsPlugin extends Plugin {
    async onload() {
        const commands = [
            ["openInNewTab", "always open in new tab"],
            ["deduplicateTabs", "prevent duplicate tabs"],
        ] as const;

        for (const [setting, name] of commands) {
            const id = setting.replace(/[A-Z]/g, l => `-${l.toLowerCase()}`);

            // Toggle command
            this.addCommand({
                id: `toggle-${id}`,
                name: `Toggle ${name}`,
                callback: async () => {
                    await this.updateSettings({
                        [setting]: !this.settings[setting]
                    });
                },
            });

            // Enable command
            this.addCommand({
                id: `enable-${id}`,
                name: `Enable ${name}`,
                callback: async () => {
                    await this.updateSettings({[setting]: true});
                },
            });

            // Disable command
            this.addCommand({
                id: `disable-${id}`,
                name: `Disable ${name}`,
                callback: async () => {
                    await this.updateSettings({[setting]: false});
                },
            });
        }
    }
}

// Example: Using commands programmatically
const plugin = app.plugins.getPlugin('open-tab-settings');

// Execute via command palette
app.commands.executeCommandById('open-tab-settings:toggle-open-in-new-tab');
app.commands.executeCommandById('open-tab-settings:enable-deduplicate-tabs');
app.commands.executeCommandById('open-tab-settings:disable-deduplicate-tabs');

// Or update settings directly
await plugin.updateSettings({ openInNewTab: true });
await plugin.updateSettings({ deduplicateTabs: false });
```

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