Help for display module in page product

[Danieleeffe1]

Goodmorning everyone.

I need help.

I installed a module (meetanshi wathapp share) that inserts a wathapp button on the product page under the "add to cart" button (reference product.info.addtocart)

I want to move it along with the Twitter and FB "share links".

By modifying the xml file of the module I succeeded in my goal but only in the configurable products.

I have never quite understood the logic behind xml layout files.
I can't find a diagram showing the "references" where to place the modules.

I am forced to go through all the xml files to find the one that refers to the sharing links (which I cannot find) to see how it is written.

How can I do?
Can someone help me?
Thank you.

Below is the layout xml file of the wathapp share module:

<?xml version="1.0"?>
<layout version="0.1.0">
    <catalog_product_view>
        <block type="whatsapp/index" name="whatsappimage"  template="whatsapp/catalog/product/view/head.phtml"/>
        <reference name="head" ifconfig="whatsappshare/whatsappconfig/whatsapp_enable">
            <action method="append" ifconfig="whatsappshare/whatsappconfig/whatsapp_enable"><block>whatsappimage</block></action>
            <action method="addCss"><stylesheet>css/whatsapp.css</stylesheet></action>
        </reference>
        <block type="whatsapp/index" name="whatsapp_share" template="whatsapp/catalog/product/view/whatsappshare.phtml" >
            <block type="whatsapp/index" name="display_whatsapp" template="whatsapp/catalog/product/view/displaywhatsapp.phtml"/>
        </block>
        <reference name="product.info.addtocart">
            <action method="append" ifconfig="whatsappshare/whatsappconfig/whatsapp_enable"  ><block>whatsapp_share</block></action>
        </reference>
    </catalog_product_view>
    <catalog_category_default>
        <reference name="head" ifconfig="whatsappshare/whatsappconfig/whatsapp_enable">
            <action method="addCss"><stylesheet>css/whatsapp.css</stylesheet></action>
        </reference>
        <reference name="product_list">
            <action method="setTemplate" ifconfig="whatsappshare/whatsappconfig/whatsapp_enable">
                <template>whatsapp/catalog/product/list.phtml</template>
            </action>
            <block type="whatsapp/index" name="display_list" template="whatsapp/catalog/product/list/displaylist.phtml"/>
            <block type="whatsapp/index" name="display_grid" template="whatsapp/catalog/product/list/displaygrid.phtml"/>
        </reference>
    </catalog_category_default>
</layout>

[luigifab]

For layout it works like this.
Let's take the example of the contact page with a default installation of OpenMage.

All xml files of enabled modules in app/design/frontend/rwd/default/layout/*.xml and all xml files of enabled modules in app/design/frontend/base/default/layout/*.xml (only if the file doesn't exist in rwd, for example page.xml exists in rwd and base, so OpenMage use page.xml of rwd and ignore page.xml of base) are merged into one single file.

To render the contact page, OpenMage use the full action name.
Here it's contacts_index_index (read the css classes of body tag).
If you search <contacts_index_index in all xml layout files you will found it in app/design/frontend/rwd/default/layout/contacts.xml.
You need also <default tags.

As you can see in <contacts_index_index>, the layout of the contact page do not <remove name="root" /> and do not use output="toHtml" attribute. So the contact page use <default> tag from app/design/frontend/rwd/default/layout/page.xml.

The <default> define the root block/template: <block type="page/html" name="root" output="toHtml" template="page/3columns.phtml">.
This template will be the top of the top of all templates displayed.

But the layout of the contact page says: <reference name="root"><action method="setTemplate"><template>page/2columns-left.phtml</template></action></reference>.
So the top of the top of all templates displayed is not page/3columns.phtml but page/2columns-left.phtml.

If you read page/2columns-left.phtml, you will found: <?php echo $this->getChildHtml('content') ?>.
This line will output the contact form: <reference name="content"><block type="core/template" name="contactForm" template="contacts/form.phtml" /></reference>.

[luigifab]

If someone know a good resource that explain that.