Ghost/ghost/admin/lib/koenig-editor/addon/components/koenig-card-code.hbs

<KoenigCard
    @class={{concat "ba b--white relative kg-card-hover miw-100" (if this.isEditing " bw2 pt1 pb1 pl2 nl6 pr6 nr6")}}
    @style={{this.cardStyle}}
    @headerOffset={{this.headerOffset}}
    @toolbar={{this.toolbar}}
    @payload={{this.payload}}
    @isSelected={{this.isSelected}}
    @isEditing={{this.isEditing}}
    @selectCard={{action this.selectCard}}
    @deselectCard={{action this.deselectCard}}
    @editCard={{action this.editCard}}
    @saveCard={{action this.saveCard}}
    @saveAsSnippet={{this.saveAsSnippet}}
    @onEnterEdit={{action "enterEditMode"}}
    @onLeaveEdit={{action "leaveEditMode"}}
    @addParagraphAfterCard={{this.addParagraphAfterCard}}
    @moveCursorToPrevSection={{this.moveCursorToPrevSection}}
    @moveCursorToNextSection={{this.moveCursorToNextSection}}
    @editor={{this.editor}}
    as |card|
>
    {{#if this.isEditing}}
        <GhCmEditor @value={{this.payload.code}}
            @class="koenig-card-code--editor koenig-card-html--editor"
            @textareaClass="o-0"
            @autofocus={{true}}
            @lineWrapping={{true}}
            @update={{action "updateCode"}}
            @mode={{this.cmMode}}
        />
        <input
            type="text"
            value={{readonly this.payload.language}}
            onblur={{action (mut this.payload.language) value="target.value"}}
            placeholder="Language..."
            class="absolute w-20 pa1 ba b--lightgrey br2 f8 tracked-2 fw4 z-999 outline-0 anim-normal"
            style={{this.languageInputStyle}}
        />
    {{else}}
        <div class="koenig-card-html-rendered">
            <pre><code class="line-numbers {{if this.payload.language (concat "language-" this.payload.language)}}">{{this.escapedCode}}</code></pre>
        </div>
        {{#if this.payload.language}}
            <div class="absolute top-2 right-2 flex justify-center items-center pa2">
                <span class="db nudge-top--2 fw5 f8 midlightgrey">{{this.payload.language}}</span>
            </div>
        {{/if}}
        <div class="koenig-card-click-overlay"></div>
    {{/if}}

    {{#if (and (not this.isEditing) (or this.isSelected (clean-basic-html this.payload.caption)))}}
        <card.CaptionInput
            @class="z-999"
            @caption={{this.payload.caption}}
            @update={{action "updateCaption"}}
            @placeholder="Type caption for code block (optional)"
        />
    {{/if}}
</KoenigCard>