Determine status of Edit Mode in WebSphere Portal theme

edit-mode-status.jsp

<%!--
In Any of the JSP file of the theme, place below code. You can modify according to your needs.
I had placed it in head.jsp
--%>
<c:set var="editModeQName" value="{http://www.ibm.com/xmlns/prod/websphere/portal/publicparams}editMode" />
<c:set var="isEditModeActive" value="${wp.publicRenderParam[editModeQName]}" />
<c:if test="${isEditModeActive}">
<p>Edit mode is turned on</p>
</c:if>

from-client-side.js

// If you want to determine status on client side, plese use below syntax. wpModules should be available in your theme.
wpModules.toolbar.isEditModeActive()

list-of-public-render-param

Namespace: {http://www.ibm.com/xmlns/prod/websphere/portal/publicparams}
Supported Parameter list -
    selection (NAME_SELECTION)
    uri (NAME_URI)
    parameters (NAME_PARAMETERS)
    locale (NAME_LOCALE)
    themeTemplate (NAME_THEME_TEMPLATE)
    labelMappings (NAME_LABEL_MAPPINGS)
    screenTemplate (NAME_SCREEN_TEMPLATE)
    themePolicy (NAME_THEME_POLICY)
    solo (NAME_SOLO)
    showTools (NAME_SHOW_TOOLS)
    hiddenContent (NAME_HIDDEN_CONTENT)
    hiddenPages (NAME_HIDDEN_PAGES)
    statePartition (NAME_STATE_PARTITION)
    path-info (NAME_PATH_INFO)
    focus (NAME_FOCUS)
    deviceClass (NAME_DEVICE_CLASS)
    digest (NAME_DIGEST)
    pageMode (NAME_PAGE_MODE)
    editMode (NAME_PAGE_EDIT_MODE)
    infoMode (NAME_PAGE_INFO_MODE)
    helpMode (NAME_PAGE_HELP_MODE)

You can query actual parameter by ${Namespace}/${mode}
For example - {http://www.ibm.com/xmlns/prod/websphere/portal/publicparams}hiddenPages - represent hiddenPages paramters