Replace colors found in layers by name.py

from gimpfu import *

def html_to_rgb(html_color):
    html_color = html_color.lstrip('#')
    return tuple(int(html_color[i:i+2], 16) for i in (0, 2, 4))

def replace_colors_in_layer(image, layer, new_color, fill_color):
    pdb.gimp_image_undo_group_start(image)
    
    # Create a new layer filled with the new color
    new_layer = gimp.Layer(image, "Color Replacement", layer.width, layer.height, RGBA_IMAGE, 100, NORMAL_MODE)
    pdb.gimp_image_insert_layer(image, new_layer, None, 0)
    pdb.gimp_context_set_foreground(new_color)
    pdb.gimp_drawable_fill(new_layer, FOREGROUND_FILL)
    
    # Copy the alpha channel from the original layer
    pdb.gimp_edit_copy(layer)
    float_sel = pdb.gimp_edit_paste(new_layer, True)
    pdb.gimp_floating_sel_anchor(float_sel)
    
    # Set the layer mode to NORMAL and copy it back to the original layer
    pdb.gimp_layer_set_mode(new_layer, NORMAL_MODE)
    pdb.gimp_edit_copy(new_layer)
    float_sel = pdb.gimp_edit_paste(layer, True)
    pdb.gimp_floating_sel_anchor(float_sel)
    
    # Remove the temporary layer
    pdb.gimp_image_remove_layer(image, new_layer)
    
    # Delete every color in the current layer that is not the new_color
    pdb.gimp_image_select_color(image, CHANNEL_OP_REPLACE, layer, new_color)
    pdb.gimp_selection_invert(image)
    pdb.gimp_edit_clear(layer)
    
    # Fill the empty part of the layer with fill_color
    pdb.gimp_context_set_foreground(fill_color)
    pdb.gimp_edit_bucket_fill(layer, FG_BUCKET_FILL, NORMAL_MODE, 100, 0, FALSE, 0, 0)
    
    # Delete the first color (new_color)
    pdb.gimp_image_select_color(image, CHANNEL_OP_REPLACE, layer, new_color)
    pdb.gimp_edit_clear(layer)
    
    # Clear the selection
    pdb.gimp_selection_none(image)
    
    pdb.gimp_image_undo_group_end(image)

def find_layers_in_group(group, search_term):
    layers_to_process = []
    for layer in group.layers:
        if pdb.gimp_item_is_group(layer):
            if search_term.lower() in pdb.gimp_item_get_name(layer).lower():
                layers_to_process.extend(find_layers_in_group(layer, ""))
            else:
                layers_to_process.extend(find_layers_in_group(layer, search_term))
        elif not search_term or search_term.lower() in pdb.gimp_item_get_name(layer).lower():
            layers_to_process.append(layer)
    return layers_to_process

def replace_colors_in_groups(image, drawable, search_term, html_color, fill_html_color):
    new_color = html_to_rgb(html_color)
    fill_color = html_to_rgb(fill_html_color)
    
    pdb.gimp_image_undo_group_start(image)
    
    layers_to_process = find_layers_in_group(image, search_term)
    
    for layer in layers_to_process:
        replace_colors_in_layer(image, layer, new_color, fill_color)
    
    pdb.gimp_image_undo_group_end(image)
    gimp.displays_flush()

register(
    "python_fu_replace_colors_in_groups",
    "Replace colors in layers within groups containing a search term",
    "Replaces colors in layers within groups containing a search term with a specified HTML color",
    "Jordan B",
    "J",
    "2024",
    "<Image>/Colors/Replace colors found in layers by name...",
    "*",
    [
        (PF_STRING, "search_term", "Group Name Search Term", ""),
        (PF_STRING, "html_color", "Initial Replacement HTML Color", "#FFFFFF"),
        (PF_STRING, "fill_html_color", "Fill HTML Color", "#000000")
    ],
    [],
    replace_colors_in_groups
)

main()