bitbake: hob/packageselectionpage: Correctly restore previously selected packages

"Back" button from "Packageselection" page now restores correctly previously
selected packages list. Till now "Back" button was implemented just to switch
pages, not to cancel changes you have made to packages list.

[YOCTO #2984]

(Bitbake rev: 1ad03d6a327eb3389f7b4d0d74d2e8ae8b50c3b6)

Signed-off-by: Cristiana Voicu <cristiana.voicu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/ui/crumbs/builder.py

@@ -123,6 +123,7 @@ class Configuration:
         self.selected_image = None
         self.selected_recipes = []
         self.selected_packages = []
+        self.initial_selected_packages = []
 
     def split_proxy(self, protocol, proxy):
         entry = []
@@ -519,6 +520,12 @@ class Builder(gtk.Window):
         self.handler.reset_build()
         self.handler.generate_packages(all_recipes, self.configuration.default_task)
 
+    def restore_initial_selected_packages(self):
+        self.package_model.set_selected_packages(self.configuration.initial_selected_packages)
+        for package in self.configuration.selected_packages:
+            if package not in self.configuration.initial_selected_packages:
+                self.package_model.exclude_item(self.package_model.find_path_for_item(package))
+
     def fast_generate_image_async(self, log = False):
         self.switch_page(self.FAST_IMAGE_GENERATING)
         if log:
@@ -658,6 +665,7 @@ class Builder(gtk.Window):
             self.build_details_page.show_page(next_step)
 
         elif next_step == self.PACKAGE_GENERATED:
+            self.configuration.initial_selected_packages = self.configuration.selected_packages
             if self.recipe_model.get_selected_image() == self.recipe_model.__custom_image__:
                 self.package_details_page.set_packages_curr_tab(self.package_details_page.ALL)
             else:

bitbake/lib/bb/ui/crumbs/packageselectionpage.py

@@ -192,6 +192,9 @@ class PackageSelectionPage (HobPage):
         self.builder.build_image()
 
     def back_button_clicked_cb(self, button):
+        self.builder.restore_initial_selected_packages()
+        self.refresh_selection()
+
         if self.builder.current_step ==  self.builder.PACKAGE_GENERATED:
             self.builder.show_recipes()
         elif self.builder.previous_step ==  self.builder.IMAGE_GENERATED: