Allow hotkey scheme to be an arbitrary string

Changes

Allow hotkey scheme to be an arbitrary string.
Fix insertion for lazy grapheme clustering.
Allow multiple key chords in one settings statement.
Make a key combination action parameterized.
Fix handled key combination leak.
Replace ToggleHotkeyScheme with SwitchHotkeyScheme.
Introduce parameterized actions TerminalScrollViewportByPage and TerminalScrollViewportByCell.

<config>
    <term>
        <menu>
            <item type="Option" action=SwitchHotkeyScheme label=" Keys0 " data="">
                <label="\e[48:2:0:128:128;38:2:0:255:0m Keys1 \e[m" data="1"/>
                <tooltip>
                    " Toggle hotkey scheme                          \n"
                    "   Alternative hotkey scheme allows keystrokes \n"
                    "   to be passed through without processing     "
                </tooltip>
            </item>
        </menu>
    </term>
    <hotkeys>  <!-- The required key combination sequence can be generated on the Info page, accessible by clicking on the label in the lower right corner of the vtm desktop. -->
        <tui key*>  <!-- TUI matrix layer key bindings. The scheme=0 is implicitly used by default. -->
            <key="Space-Backspace | Backspace-Space" action=ToggleDebugOverlay/>  <!-- Toggle debug overlay. -->
            <key="Ctrl-Alt | Alt-Ctrl" scheme=""> <action=SwitchHotkeyScheme data="1"/></key>  <!-- Switch the hotkey scheme to "1" by pressing and releasing Ctrl-Alt or Alt-Ctrl (reversed release order). -->
            <key="Ctrl-Alt | Alt-Ctrl" scheme="1"><action=SwitchHotkeyScheme data=""/> </key>  <!-- Switch the hotkey scheme to default by pressing and releasing Ctrl-Alt or Alt-Ctrl (reversed release order). -->
        </tui>
        <term key*>  <!-- Application specific layer key bindings. -->
            <key="Alt+RightArrow" action=TerminalFindNext/>  <!-- Highlight next match of selected text fragment. Clipboard content is used if no active selection. -->
            <key="Alt+LeftArrow"  action=TerminalFindPrev/>  <!-- Highlight previous match of selected text fragment. Clipboard content is used if no active selection. -->
            <key="Shift+Ctrl+PageUp">       <action=TerminalScrollViewportByPage data=" 0, 1"/></key>  <!-- Scroll viewport one page up. -->
            <key="Shift+Ctrl+PageDown">     <action=TerminalScrollViewportByPage data=" 0,-1"/></key>  <!-- Scroll viewport one page down. -->
            <key="Ctrl+PageUp"   scheme="1"><action=TerminalScrollViewportByPage data=" 0, 1"/></key>  <!-- Scroll viewport one page up. -->
            <key="Ctrl+PageDown" scheme="1"><action=TerminalScrollViewportByPage data=" 0,-1"/></key>  <!-- Scroll viewport one page down. -->
            <key="Shift+Alt+LeftArrow">     <action=TerminalScrollViewportByPage data=" 1, 0"/></key>  <!-- Scroll viewport one page to the left. -->
            <key="Shift+Alt+RightArrow">    <action=TerminalScrollViewportByPage data="-1, 0"/></key>  <!-- Scroll viewport one page to the right. -->
            <key="Shift+Ctrl+UpArrow">      <action=TerminalScrollViewportByCell data=" 0, 1"/></key>  <!-- Scroll viewport one line up. -->
            <key="Shift+Ctrl+DownArrow">    <action=TerminalScrollViewportByCell data=" 0,-1"/></key>  <!-- Scroll viewport one line down. -->
            <key="Shift+Ctrl+LeftArrow">    <action=TerminalScrollViewportByCell data=" 1, 0"/></key>  <!-- Scroll viewport one cell to the left. -->
            <key="Shift+Ctrl+RightArrow">   <action=TerminalScrollViewportByCell data="-1, 0"/></key>  <!-- Scroll viewport one cell to the right. -->
        </term>
    </hotkeys>
</config>

directvt / vtm

Allow hotkey scheme to be an arbitrary string #686

Changes