ayon-core/openpype/tools/loader/widgets.py

import os
import sys
import datetime
import pprint
import traceback
import collections

from qtpy import QtWidgets, QtCore, QtGui

from openpype.client import (
    get_subset_families,
    get_subset_by_id,
    get_subsets,
    get_version_by_id,
    get_versions,
    get_representations,
    get_thumbnail_id_from_source,
    get_thumbnail,
)
from openpype.client.operations import OperationsSession, REMOVED_VALUE
from openpype.pipeline import HeroVersionType, Anatomy
from openpype.pipeline.thumbnail import get_thumbnail_binary
from openpype.pipeline.load import (
    discover_loader_plugins,
    SubsetLoaderPlugin,
    loaders_from_repre_context,
    get_repres_contexts,
    get_subset_contexts,
    load_with_repre_context,
    load_with_subset_context,
    load_with_subset_contexts,
    LoadError,
    IncompatibleLoaderError,
)
from openpype.tools.utils import (
    ErrorMessageBox,
    lib as tools_lib
)
from openpype.tools.utils.lib import checkstate_int_to_enum
from openpype.tools.utils.delegates import (
    VersionDelegate,
    PrettyTimeDelegate
)
from openpype.tools.utils.widgets import (
    OptionalMenu,
    PlaceholderLineEdit
)
from openpype.tools.utils.views import (
    TreeViewSpinner,
    DeselectableTreeView
)
from openpype.tools.utils.constants import (
    LOCAL_PROVIDER_ROLE,
    REMOTE_PROVIDER_ROLE,
    LOCAL_AVAILABILITY_ROLE,
    REMOTE_AVAILABILITY_ROLE,
)
from openpype.tools.assetlinks.widgets import SimpleLinkView

from .model import (
    SubsetsModel,
    SubsetFilterProxyModel,
    FamiliesFilterProxyModel,
    RepresentationModel,
    RepresentationSortProxyModel,
    ITEM_ID_ROLE
)
from . import lib
from .delegates import LoadedInSceneDelegate


class OverlayFrame(QtWidgets.QFrame):
    def __init__(self, label, parent):
        super(OverlayFrame, self).__init__(parent)

        label_widget = QtWidgets.QLabel(label, self)
        label_widget.setAttribute(QtCore.Qt.WA_TranslucentBackground)

        main_layout = QtWidgets.QVBoxLayout(self)
        main_layout.addWidget(label_widget, 1, QtCore.Qt.AlignCenter)

        self.label_widget = label_widget

        self.setStyleSheet((
            "background: rgba(0, 0, 0, 127);"
            "font-size: 60pt;"
        ))

    def set_label(self, label):
        self.label_widget.setText(label)


class LoadErrorMessageBox(ErrorMessageBox):
    def __init__(self, messages, parent=None):
        self._messages = messages
        super(LoadErrorMessageBox, self).__init__("Loading failed", parent)

    def _create_top_widget(self, parent_widget):
        label_widget = QtWidgets.QLabel(parent_widget)
        label_widget.setText(
            "<span style='font-size:18pt;'>Failed to load items</span>"
        )
        return label_widget

    def _get_report_data(self):
        report_data = []
        for exc_msg, tb_text, repre, subset, version in self._messages:
            report_message = (
                "During load error happened on Subset: \"{subset}\""
                " Representation: \"{repre}\" Version: {version}"
                "\n\nError message: {message}"
            ).format(
                subset=subset,
                repre=repre,
                version=version,
                message=exc_msg
            )
            if tb_text:
                report_message += "\n\n{}".format(tb_text)
            report_data.append(report_message)
        return report_data

    def _create_content(self, content_layout):
        item_name_template = (
            "<span style='font-weight:bold;'>Subset:</span> {}<br>"
            "<span style='font-weight:bold;'>Version:</span> {}<br>"
            "<span style='font-weight:bold;'>Representation:</span> {}<br>"
        )
        exc_msg_template = "<span style='font-weight:bold'>{}</span>"

        for exc_msg, tb_text, repre, subset, version in self._messages:
            line = self._create_line()
            content_layout.addWidget(line)

            item_name = item_name_template.format(subset, version, repre)
            item_name_widget = QtWidgets.QLabel(
                item_name.replace("\n", "<br>"), self
            )
            item_name_widget.setWordWrap(True)
            content_layout.addWidget(item_name_widget)

            exc_msg = exc_msg_template.format(exc_msg.replace("\n", "<br>"))
            message_label_widget = QtWidgets.QLabel(exc_msg, self)
            message_label_widget.setWordWrap(True)
            content_layout.addWidget(message_label_widget)

            if tb_text:
                line = self._create_line()
                tb_widget = self._create_traceback_widget(tb_text, self)
                content_layout.addWidget(line)
                content_layout.addWidget(tb_widget)


class SubsetWidget(QtWidgets.QWidget):
    """A widget that lists the published subsets for an asset"""

    active_changed = QtCore.Signal()    # active index changed
    version_changed = QtCore.Signal()   # version state changed for a subset
    load_started = QtCore.Signal()
    load_ended = QtCore.Signal()
    refreshed = QtCore.Signal(bool)

    default_widths = (
        ("subset", 200),
        ("asset", 130),
        ("family", 90),
        ("version", 60),
        ("time", 125),
        ("author", 75),
        ("frames", 75),
        ("duration", 60),
        ("handles", 55),
        ("step", 10),
        ("loaded_in_scene", 25),
        ("repre_info", 65)
    )

    def __init__(
        self,
        dbcon,
        groups_config,
        family_config_cache,
        enable_grouping=True,
        tool_name=None,
        parent=None
    ):
        super(SubsetWidget, self).__init__(parent=parent)

        self.dbcon = dbcon
        self.tool_name = tool_name

        model = SubsetsModel(
            dbcon,
            groups_config,
            family_config_cache,
            grouping=enable_grouping
        )
        proxy = SubsetFilterProxyModel()
        proxy.setSourceModel(model)
        proxy.setDynamicSortFilter(True)
        proxy.setFilterCaseSensitivity(QtCore.Qt.CaseInsensitive)

        family_proxy = FamiliesFilterProxyModel()
        family_proxy.setSourceModel(proxy)

        subset_filter = PlaceholderLineEdit(self)
        subset_filter.setPlaceholderText("Filter subsets..")

        group_checkbox = QtWidgets.QCheckBox("Enable Grouping", self)
        group_checkbox.setChecked(enable_grouping)

        top_bar_layout = QtWidgets.QHBoxLayout()
        top_bar_layout.addWidget(subset_filter)
        top_bar_layout.addWidget(group_checkbox)

        view = TreeViewSpinner(self)
        view.setModel(family_proxy)
        view.setObjectName("SubsetView")
        view.setIndentation(20)
        view.setAllColumnsShowFocus(True)
        view.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
        view.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
        view.setSortingEnabled(True)
        view.sortByColumn(1, QtCore.Qt.AscendingOrder)
        view.setAlternatingRowColors(True)

        # Set view delegates
        version_delegate = VersionDelegate(self.dbcon, view)
        column = model.Columns.index("version")
        view.setItemDelegateForColumn(column, version_delegate)

        time_delegate = PrettyTimeDelegate(view)
        column = model.Columns.index("time")
        view.setItemDelegateForColumn(column, time_delegate)

        avail_delegate = AvailabilityDelegate(self.dbcon, view)
        column = model.Columns.index("repre_info")
        view.setItemDelegateForColumn(column, avail_delegate)

        loaded_in_scene_delegate = LoadedInSceneDelegate(view)
        column = model.Columns.index("loaded_in_scene")
        view.setItemDelegateForColumn(column, loaded_in_scene_delegate)

        layout = QtWidgets.QVBoxLayout(self)
        layout.setContentsMargins(0, 0, 0, 0)
        layout.addLayout(top_bar_layout)
        layout.addWidget(view)

        # settings and connections
        for column_name, width in self.default_widths:
            idx = model.Columns.index(column_name)
            view.setColumnWidth(idx, width)

        self.model = model
        self.view = view

        self.on_project_change(dbcon.current_project())

        view.customContextMenuRequested.connect(self.on_context_menu)

        selection = view.selectionModel()
        selection.selectionChanged.connect(self.active_changed)

        version_delegate.version_changed.connect(self.version_changed)

        group_checkbox.stateChanged.connect(self.set_grouping)

        subset_filter.textChanged.connect(self._subset_changed)

        model.refreshed.connect(self.refreshed)

        self.proxy = proxy
        self.family_proxy = family_proxy

        self._subset_filter = subset_filter
        self._group_checkbox = group_checkbox

        self._version_delegate = version_delegate
        self._time_delegate = time_delegate

        self.model.refresh()

    def get_subsets_families(self):
        return self.model.get_subsets_families()

    def set_family_filters(self, families):
        self.family_proxy.setFamiliesFilter(families)

    def is_groupable(self):
        return self._group_checkbox.isChecked()

    def set_grouping(self, state):
        with tools_lib.preserve_selection(tree_view=self.view,
                                          current_index=False):
            self.model.set_grouping(state)

    def _subset_changed(self, text):
        if hasattr(self.proxy, "setFilterRegExp"):
            self.proxy.setFilterRegExp(text)
        else:
            self.proxy.setFilterRegularExpression(text)
        self.view.expandAll()

    def set_loading_state(self, loading, empty):
        view = self.view

        if view.is_loading != loading:
            if loading:
                view.spinner.repaintNeeded.connect(view.viewport().update)
            else:
                view.spinner.repaintNeeded.disconnect()

        view.is_loading = loading
        view.is_empty = empty

    def _repre_contexts_for_loaders_filter(self, items):
        version_docs_by_id = {
            item["version_document"]["_id"]: item["version_document"]
            for item in items
        }
        version_docs_by_subset_id = collections.defaultdict(list)
        for item in items:
            subset_id = item["version_document"]["parent"]
            version_docs_by_subset_id[subset_id].append(
                item["version_document"]
            )

        project_name = self.dbcon.active_project()
        subset_docs = list(get_subsets(
            project_name,
            subset_ids=version_docs_by_subset_id.keys(),
            fields=["schema", "data.families"]
        ))
        subset_docs_by_id = {
            subset_doc["_id"]: subset_doc
            for subset_doc in subset_docs
        }
        version_ids = list(version_docs_by_id.keys())
        repre_docs = get_representations(
            project_name,
            version_ids=version_ids,
            fields=["name", "parent", "data", "context"]
        )

        repre_docs_by_version_id = {
            version_id: []
            for version_id in version_ids
        }
        repre_context_by_id = {}
        for repre_doc in repre_docs:
            version_id = repre_doc["parent"]
            repre_docs_by_version_id[version_id].append(repre_doc)

            version_doc = version_docs_by_id[version_id]
            repre_context_by_id[repre_doc["_id"]] = {
                "representation": repre_doc,
                "version": version_doc,
                "subset": subset_docs_by_id[version_doc["parent"]]
            }
        return repre_context_by_id, repre_docs_by_version_id

    def on_project_change(self, project_name):
        """
            Called on each project change in parent widget.

            Checks if Sync Server is enabled for a project, pushes changes to
            model.
        """
        enabled = False
        if project_name:
            self.model.reset_sync_server(project_name)
            sync_server = self.model.sync_server
            if sync_server:
                enabled = sync_server.is_project_enabled(project_name,
                                                         single=True)

        lib.change_visibility(self.model, self.view, "repre_info", enabled)

    def get_selected_items(self):
        selection_model = self.view.selectionModel()
        indexes = selection_model.selectedIndexes()

        item_ids = set()
        for index in indexes:
            item_id = index.data(ITEM_ID_ROLE)
            if item_id is not None:
                item_ids.add(item_id)

        output = []
        for item_id in item_ids:
            item = self.model.get_item_by_id(item_id)
            if item is not None:
                output.append(item)
        return output

    def get_selected_merge_items(self):
        output = []
        items = collections.deque(self.get_selected_items())

        item_ids = set()
        while items:
            item = items.popleft()
            if item.get("isGroup"):
                for child in item.children():
                    items.appendleft(child)

            elif item.get("isMerged"):
                item_id = item["id"]
                if item_id not in item_ids:
                    item_ids.add(item_id)
                    output.append(item)

        return output

    def get_selected_subsets(self):
        output = []
        items = collections.deque(self.get_selected_items())

        item_ids = set()
        while items:
            item = items.popleft()
            if item.get("isGroup") or item.get("isMerged"):
                for child in item.children():
                    items.appendleft(child)
            else:
                item_id = item["id"]
                if item_id not in item_ids:
                    item_ids.add(item_id)
                    output.append(item)
        return output

    def on_context_menu(self, point):
        """Shows menu with loader actions on Right-click.

        Registered actions are filtered by selection and help of
        `loaders_from_representation` from avalon api. Intersection of actions
        is shown when more subset is selected. When there are not available
        actions for selected subsets then special action is shown (works as
        info message to user): "*No compatible loaders for your selection"

        """

        point_index = self.view.indexAt(point)
        if not point_index.isValid():
            return

        # Get selected subsets without groups
        items = self.get_selected_subsets()

        # Get all representation->loader combinations available for the
        # index under the cursor, so we can list the user the options.
        project_name = self.dbcon.active_project()
        available_loaders = discover_loader_plugins(project_name)
        if self.tool_name:
            available_loaders = lib.remove_tool_name_from_loaders(
                available_loaders, self.tool_name
            )

        repre_loaders = []
        subset_loaders = []
        for loader in available_loaders:
            if not loader.enabled:
                continue
            # Skip if its a SubsetLoader.
            if issubclass(loader, SubsetLoaderPlugin):
                subset_loaders.append(loader)
            else:
                repre_loaders.append(loader)

        loaders = list()

        # Bool if is selected only one subset
        one_item_selected = (len(items) == 1)

        # Prepare variables for multiple selected subsets
        first_loaders = []
        found_combinations = None

        is_first = True
        repre_context_by_id, repre_docs_by_version_id = (
            self._repre_contexts_for_loaders_filter(items)
        )
        for item in items:
            _found_combinations = []
            version_id = item["version_document"]["_id"]
            repre_docs = repre_docs_by_version_id[version_id]
            for repre_doc in repre_docs:
                repre_context = repre_context_by_id[repre_doc["_id"]]
                for loader in loaders_from_repre_context(
                    repre_loaders,
                    repre_context
                ):
                    # do not allow download whole repre, select specific repre
                    if tools_lib.is_sync_loader(loader):
                        continue

                    # skip multiple select variant if one is selected
                    if one_item_selected:
                        loaders.append((repre_doc, loader))
                        continue

                    # store loaders of first subset
                    if is_first:
                        first_loaders.append((repre_doc, loader))

                    # store combinations to compare with other subsets
                    _found_combinations.append(
                        (repre_doc["name"].lower(), loader)
                    )

            # skip multiple select variant if one is selected
            if one_item_selected:
                continue

            is_first = False
            # Store first combinations to compare
            if found_combinations is None:
                found_combinations = _found_combinations
            # Intersect found combinations with all previous subsets
            else:
                found_combinations = list(
                    set(found_combinations) & set(_found_combinations)
                )

        if not one_item_selected:
            # Filter loaders from first subset by intersected combinations
            for repre, loader in first_loaders:
                if (repre["name"].lower(), loader) not in found_combinations:
                    continue

                loaders.append((repre, loader))

        # Subset Loaders.
        for loader in subset_loaders:
            loaders.append((None, loader))

        loaders = lib.sort_loaders(loaders)

        # Prepare menu content based on selected items
        menu = OptionalMenu(self)
        if not loaders:
            action = lib.get_no_loader_action(menu, one_item_selected)
            menu.addAction(action)
        else:
            repre_contexts = get_repres_contexts(
                repre_context_by_id.keys(), self.dbcon)

            menu = lib.add_representation_loaders_to_menu(
                loaders, menu, repre_contexts)

        # Show the context action menu
        global_point = self.view.mapToGlobal(point)
        action = menu.exec_(global_point)
        if not action or not action.data():
            return

        # Find the representation name and loader to trigger
        action_representation, loader = action.data()

        self.load_started.emit()

        if issubclass(loader, SubsetLoaderPlugin):
            subset_ids = []
            subset_version_docs = {}
            for item in items:
                subset_id = item["version_document"]["parent"]
                subset_ids.append(subset_id)
                subset_version_docs[subset_id] = item["version_document"]

            # get contexts only for selected menu option
            subset_contexts_by_id = get_subset_contexts(subset_ids, self.dbcon)
            subset_contexts = list(subset_contexts_by_id.values())
            options = lib.get_options(action, loader, self, subset_contexts)

            error_info = _load_subsets_by_loader(
                loader, subset_contexts, options, subset_version_docs
            )

        else:
            representation_name = action_representation["name"]

            # Run the loader for all selected indices, for those that have the
            # same representation available

            # Trigger
            project_name = self.dbcon.active_project()
            subset_name_by_version_id = dict()
            for item in items:
                version_id = item["version_document"]["_id"]
                subset_name_by_version_id[version_id] = item["subset"]

            version_ids = set(subset_name_by_version_id.keys())
            repre_docs = get_representations(
                project_name,
                representation_names=[representation_name],
                version_ids=version_ids,
                fields=["_id", "parent"]
            )

            repre_ids = []
            for repre_doc in repre_docs:
                repre_ids.append(repre_doc["_id"])

                # keep only version ids without representation with that name
                version_id = repre_doc["parent"]
                version_ids.discard(version_id)

            if version_ids:
                # report versions that didn't have valid representation
                joined_subset_names = ", ".join([
                    '"{}"'.format(subset_name_by_version_id[version_id])
                    for version_id in version_ids
                ])
                self.echo("Subsets {} don't have representation '{}'".format(
                    joined_subset_names, representation_name
                ))

            # get contexts only for selected menu option
            repre_contexts = get_repres_contexts(repre_ids, self.dbcon)
            options = lib.get_options(
                action, loader, self, list(repre_contexts.values())
            )
            error_info = _load_representations_by_loader(
                loader, repre_contexts, options=options
            )

        self.load_ended.emit()

        if error_info:
            box = LoadErrorMessageBox(error_info, self)
            box.show()

    def group_subsets(self, name, asset_ids, items):
        subset_ids = {
            item["_id"]
            for item in items
            if item.get("_id")
        }
        if not subset_ids:
            return

        if name:
            self.echo("Group subsets to '%s'.." % name)
        else:
            self.echo("Ungroup subsets..")

        project_name = self.dbcon.active_project()
        op_session = OperationsSession()
        for subset_id in subset_ids:
            op_session.update_entity(
                project_name,
                "subset",
                subset_id,
                {"data.subsetGroup": name or REMOVED_VALUE}
            )

        op_session.commit()

    def echo(self, message):
        print(message)


class VersionTextEdit(QtWidgets.QTextEdit):
    """QTextEdit that displays version specific information.

    This also overrides the context menu to add actions like copying
    source path to clipboard or copying the raw data of the version
    to clipboard.

    """
    def __init__(self, dbcon, parent=None):
        super(VersionTextEdit, self).__init__(parent=parent)
        self.dbcon = dbcon

        self.data = {
            "source": None,
            "raw": None
        }
        self._anatomy = None

        # Reset
        self.set_version(None)

    def set_version(self, version_doc=None, version_id=None):
        # TODO expect only filling data (do not query them here!)
        if not version_doc and not version_id:
            # Reset state to empty
            self.data = {
                "source": None,
                "raw": None,
            }
            self.setText("")
            self.setEnabled(True)
            return

        self.setEnabled(True)

        print("Querying..")

        project_name = self.dbcon.active_project()
        if not version_doc:
            version_doc = get_version_by_id(project_name, version_id)
            assert version_doc, "Not a valid version id"

        if version_doc["type"] == "hero_version":
            _version_doc = get_version_by_id(
                project_name, version_doc["version_id"]
            )
            version_doc["data"] = _version_doc["data"]
            version_doc["name"] = HeroVersionType(
                _version_doc["name"]
            )

        subset = get_subset_by_id(project_name, version_doc["parent"])
        assert subset, "No valid subset parent for version"

        # Define readable creation timestamp
        created = version_doc["data"]["time"]
        created = datetime.datetime.strptime(created, "%Y%m%dT%H%M%SZ")
        created = datetime.datetime.strftime(created, "%b %d %Y %H:%M")

        comment = version_doc["data"].get("comment", None) or "No comment"

        source = version_doc["data"].get("source", None)
        source_label = source if source else "No source"

        # Store source and raw data
        self.data["source"] = source
        self.data["raw"] = version_doc

        if version_doc["type"] == "hero_version":
            version_name = "hero"
        else:
            version_name = tools_lib.format_version(version_doc["name"])

        data = {
            "subset": subset["name"],
            "version": version_name,
            "comment": comment,
            "created": created,
            "source": source_label
        }

        self.setHtml((
            "<h2>{subset}</h2>"
            "<h3>{version}</h3>"
            "<b>Comment</b><br>"
            "{comment}<br><br>"

            "<b>Created</b><br>"
            "{created}<br><br>"

            "<b>Source</b><br>"
            "{source}"
        ).format(**data))

    def contextMenuEvent(self, event):
        """Context menu with additional actions"""
        menu = self.createStandardContextMenu()

        # Add additional actions when any text so we can assume
        # the version is set.
        if self.toPlainText().strip():
            menu.addSeparator()
            action = QtWidgets.QAction(
                "Copy source path to clipboard", menu
            )
            action.triggered.connect(self.on_copy_source)
            menu.addAction(action)

            action = QtWidgets.QAction(
                "Copy raw data to clipboard", menu
            )
            action.triggered.connect(self.on_copy_raw)
            menu.addAction(action)

        menu.exec_(event.globalPos())

    def on_copy_source(self):
        """Copy formatted source path to clipboard"""
        source = self.data.get("source", None)
        if not source:
            return

        project_name = self.dbcon.current_project()
        if self._anatomy is None or self._anatomy.project_name != project_name:
            self._anatomy = Anatomy(project_name)

        path = source.format(root=self._anatomy.roots)
        clipboard = QtWidgets.QApplication.clipboard()
        clipboard.setText(path)

    def on_copy_raw(self):
        """Copy raw version data to clipboard

        The data is string formatted with `pprint.pformat`.

        """
        raw = self.data.get("raw", None)
        if not raw:
            return

        raw_text = pprint.pformat(raw)
        clipboard = QtWidgets.QApplication.clipboard()
        clipboard.setText(raw_text)


class ThumbnailWidget(QtWidgets.QLabel):
    aspect_ratio = (16, 9)
    max_width = 300

    def __init__(self, dbcon, parent=None):
        super(ThumbnailWidget, self).__init__(parent)
        self.dbcon = dbcon

        self.current_thumb_id = None
        self.current_thumbnail = None

        self.setAlignment(QtCore.Qt.AlignCenter)

        # TODO get res path much better way
        default_pix_path = os.path.join(
            os.path.dirname(os.path.abspath(__file__)),
            "images",
            "default_thumbnail.png"
        )
        self.default_pix = QtGui.QPixmap(default_pix_path)
        self.set_pixmap()

    def height(self):
        width = self.width()
        asp_w, asp_h = self.aspect_ratio

        return (width / asp_w) * asp_h

    def width(self):
        width = super(ThumbnailWidget, self).width()
        if width > self.max_width:
            width = self.max_width
        return width

    def set_pixmap(self, pixmap=None):
        if not pixmap:
            pixmap = self.default_pix
            self.current_thumb_id = None

        self.current_thumbnail = pixmap

        pixmap = self.scale_pixmap(pixmap)
        self.setPixmap(pixmap)

    def resizeEvent(self, _event):
        if not self.current_thumbnail:
            return
        cur_pix = self.scale_pixmap(self.current_thumbnail)
        self.setPixmap(cur_pix)

    def scale_pixmap(self, pixmap):
        return pixmap.scaled(
            self.width(),
            self.height(),
            QtCore.Qt.KeepAspectRatio,
            QtCore.Qt.SmoothTransformation
        )

    def set_thumbnail(self, src_type, doc_ids):
        if not doc_ids:
            self.set_pixmap()
            return

        src_id = doc_ids[0]

        project_name = self.dbcon.active_project()
        thumbnail_id = get_thumbnail_id_from_source(
            project_name,
            src_type,
            src_id,
        )
        if thumbnail_id == self.current_thumb_id:
            if self.current_thumbnail is None:
                self.set_pixmap()
            return

        self.current_thumb_id = thumbnail_id
        if not thumbnail_id:
            self.set_pixmap()
            return

        thumbnail_ent = get_thumbnail(
            project_name, thumbnail_id, src_type, src_id
        )
        if not thumbnail_ent:
            return

        thumbnail_bin = get_thumbnail_binary(
            thumbnail_ent, "thumbnail", self.dbcon
        )
        if not thumbnail_bin:
            self.set_pixmap()
            return

        thumbnail = QtGui.QPixmap()
        thumbnail.loadFromData(thumbnail_bin)

        self.set_pixmap(thumbnail)


class VersionWidget(QtWidgets.QWidget):
    """A Widget that display information about a specific version"""
    def __init__(self, dbcon, parent=None):
        super(VersionWidget, self).__init__(parent=parent)

        data = VersionTextEdit(dbcon, self)
        data.setReadOnly(True)

        depend_widget = SimpleLinkView(dbcon, self)

        tab = QtWidgets.QTabWidget()
        tab.addTab(data, "Version Info")
        tab.addTab(depend_widget, "Dependency")

        layout = QtWidgets.QVBoxLayout(self)
        layout.setContentsMargins(0, 0, 0, 0)
        layout.addWidget(tab)

        self.data = data
        self.depend_widget = depend_widget

    def set_version(self, version_doc):
        self.data.set_version(version_doc)
        self.depend_widget.set_version(version_doc)


class FamilyModel(QtGui.QStandardItemModel):
    def __init__(self, dbcon, family_config_cache):
        super(FamilyModel, self).__init__()

        self.dbcon = dbcon
        self.family_config_cache = family_config_cache

        self._items_by_family = {}

    def refresh(self):
        families = set()
        project_name = self.dbcon.current_project()
        if project_name:
            families = get_subset_families(project_name)

        root_item = self.invisibleRootItem()

        for family in tuple(self._items_by_family.keys()):
            if family not in families:
                item = self._items_by_family.pop(family)
                root_item.removeRow(item.row())

        self.family_config_cache.refresh()

        new_items = []
        for family in families:
            family_config = self.family_config_cache.family_config(family)
            label = family_config.get("label", family)
            icon = family_config.get("icon", None)

            if family_config.get("state", True):
                state = QtCore.Qt.Checked
            else:
                state = QtCore.Qt.Unchecked

            if family not in self._items_by_family:
                item = QtGui.QStandardItem(label)
                item.setFlags(
                    QtCore.Qt.ItemIsEnabled
                    | QtCore.Qt.ItemIsSelectable
                    | QtCore.Qt.ItemIsUserCheckable
                )
                new_items.append(item)
                self._items_by_family[family] = item

            else:
                item = self._items_by_family[label]
                item.setData(label, QtCore.Qt.DisplayRole)

            item.setCheckState(state)

            if icon:
                item.setIcon(icon)

        if new_items:
            root_item.appendRows(new_items)


class FamilyProxyFiler(QtCore.QSortFilterProxyModel):
    def __init__(self, *args, **kwargs):
        super(FamilyProxyFiler, self).__init__(*args, **kwargs)

        self._filtering_enabled = False
        self._enabled_families = set()

    def set_enabled_families(self, families):
        if self._enabled_families == families:
            return

        self._enabled_families = families
        if self._filtering_enabled:
            self.invalidateFilter()

    def is_filter_enabled(self):
        return self._filtering_enabled

    def set_filter_enabled(self, enabled=None):
        if enabled is None:
            enabled = not self._filtering_enabled
        elif self._filtering_enabled == enabled:
            return

        self._filtering_enabled = enabled
        self.invalidateFilter()

    def filterAcceptsRow(self, row, parent):
        if not self._filtering_enabled:
            return True

        if not self._enabled_families:
            return False

        index = self.sourceModel().index(row, self.filterKeyColumn(), parent)
        if index.data(QtCore.Qt.DisplayRole) in self._enabled_families:
            return True
        return False


class FamilyListView(QtWidgets.QListView):
    active_changed = QtCore.Signal(list)

    def __init__(self, dbcon, family_config_cache, parent=None):
        super(FamilyListView, self).__init__(parent=parent)

        self.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
        self.setAlternatingRowColors(True)
        self.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)

        family_model = FamilyModel(dbcon, family_config_cache)
        proxy_model = FamilyProxyFiler()
        proxy_model.setDynamicSortFilter(True)
        proxy_model.setSourceModel(family_model)

        self.setModel(proxy_model)

        family_model.dataChanged.connect(self._on_data_change)
        self.customContextMenuRequested.connect(self._on_context_menu)

        self._family_model = family_model
        self._proxy_model = proxy_model

    def set_enabled_families(self, families):
        self._proxy_model.set_enabled_families(families)

        self.set_enabled_family_filtering(True)

    def set_enabled_family_filtering(self, enabled=None):
        self._proxy_model.set_filter_enabled(enabled)

    def refresh(self):
        self._family_model.refresh()

        self.active_changed.emit(self.get_enabled_families())

    def get_enabled_families(self):
        """Return the checked family items"""
        model = self._family_model
        checked_families = []
        for row in range(model.rowCount()):
            index = model.index(row, 0)
            checked = checkstate_int_to_enum(
                index.data(QtCore.Qt.CheckStateRole)
            )
            if checked == QtCore.Qt.Checked:
                family = index.data(QtCore.Qt.DisplayRole)
                checked_families.append(family)

        return checked_families

    def set_all_unchecked(self):
        self._set_checkstates(False, self._get_all_indexes())

    def set_all_checked(self):
        self._set_checkstates(True, self._get_all_indexes())

    def _get_all_indexes(self):
        indexes = []
        model = self._family_model
        for row in range(model.rowCount()):
            index = model.index(row, 0)
            indexes.append(index)
        return indexes

    def _set_checkstates(self, checked, indexes):
        if not indexes:
            return

        if checked is None:
            state = None
        elif checked:
            state = QtCore.Qt.Checked
        else:
            state = QtCore.Qt.Unchecked

        self.blockSignals(True)

        for index in indexes:
            index_state = checkstate_int_to_enum(
                index.data(QtCore.Qt.CheckStateRole)
            )
            if index_state == state:
                continue

            new_state = state
            if new_state is None:
                if index_state in QtCore.Qt.Checked:
                    new_state = QtCore.Qt.Unchecked
                else:
                    new_state = QtCore.Qt.Checked

            index.model().setData(index, new_state, QtCore.Qt.CheckStateRole)

        self.blockSignals(False)

        self.active_changed.emit(self.get_enabled_families())

    def _change_selection_state(self, checked):
        indexes = self.selectionModel().selectedIndexes()
        self._set_checkstates(checked, indexes)

    def _on_data_change(self, *_args):
        self.active_changed.emit(self.get_enabled_families())

    def _on_context_menu(self, pos):
        """Build RMB menu under mouse at current position (within widget)"""
        menu = QtWidgets.QMenu(self)

        # Add enable all action
        action_check_all = QtWidgets.QAction(menu)
        action_check_all.setText("Enable All")
        action_check_all.triggered.connect(self.set_all_checked)
        # Add disable all action
        action_uncheck_all = QtWidgets.QAction(menu)
        action_uncheck_all.setText("Disable All")
        action_uncheck_all.triggered.connect(self.set_all_unchecked)

        menu.addAction(action_check_all)
        menu.addAction(action_uncheck_all)

        # Get mouse position
        global_pos = self.viewport().mapToGlobal(pos)
        menu.exec_(global_pos)

    def event(self, event):
        if not event.type() == QtCore.QEvent.KeyPress:
            pass

        elif event.key() == QtCore.Qt.Key_Space:
            self._change_selection_state(None)
            return True

        elif event.key() == QtCore.Qt.Key_Backspace:
            self._change_selection_state(False)
            return True

        elif event.key() == QtCore.Qt.Key_Return:
            self._change_selection_state(True)
            return True

        return super(FamilyListView, self).event(event)


class RepresentationWidget(QtWidgets.QWidget):
    load_started = QtCore.Signal()
    load_ended = QtCore.Signal()

    default_widths = (
        ("name", 120),
        ("subset", 125),
        ("asset", 125),
        ("active_site", 85),
        ("remote_site", 85)
    )

    commands = {'active': 'Download', 'remote': 'Upload'}

    def __init__(self, dbcon, tool_name=None, parent=None):
        super(RepresentationWidget, self).__init__(parent=parent)
        self.dbcon = dbcon
        self.tool_name = tool_name

        headers = [item[0] for item in self.default_widths]

        model = RepresentationModel(self.dbcon, headers)

        proxy_model = RepresentationSortProxyModel(self)
        proxy_model.setSourceModel(model)

        label = QtWidgets.QLabel("Representations", self)

        tree_view = DeselectableTreeView(parent=self)
        tree_view.setObjectName("RepresentationView")
        tree_view.setModel(proxy_model)
        tree_view.setAllColumnsShowFocus(True)
        tree_view.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
        tree_view.setSelectionMode(
            QtWidgets.QAbstractItemView.ExtendedSelection)
        tree_view.setSortingEnabled(True)
        tree_view.sortByColumn(1, QtCore.Qt.AscendingOrder)
        tree_view.setAlternatingRowColors(True)
        tree_view.setIndentation(20)
        tree_view.collapseAll()

        for column_name, width in self.default_widths:
            idx = model.Columns.index(column_name)
            tree_view.setColumnWidth(idx, width)

        layout = QtWidgets.QVBoxLayout(self)
        layout.setContentsMargins(0, 0, 0, 0)
        layout.addWidget(label)
        layout.addWidget(tree_view)

        # self.itemChanged.connect(self._on_item_changed)
        tree_view.customContextMenuRequested.connect(self.on_context_menu)

        self.tree_view = tree_view
        self.model = model
        self.proxy_model = proxy_model

        self.sync_server_enabled = False

        self.on_project_change(dbcon.current_project())

        self.model.refresh()

    def on_project_change(self, project_name):
        """
            Called on each project change in parent widget.

            Checks if Sync Server is enabled for a project, pushes changes to
            model.
        """
        enabled = False
        if project_name:
            self.model.reset_sync_server(project_name)
            sync_server = self.model.sync_server
            if sync_server:
                enabled = sync_server.is_project_enabled(project_name,
                                                         single=True)

        self.sync_server_enabled = enabled
        lib.change_visibility(self.model, self.tree_view,
                              "active_site", enabled)
        lib.change_visibility(self.model, self.tree_view,
                              "remote_site", enabled)

    def _repre_contexts_for_loaders_filter(self, items):
        repre_ids = []
        for item in items:
            repre_ids.append(item["_id"])

        project_name = self.dbcon.active_project()
        repre_docs = list(get_representations(
            project_name,
            representation_ids=repre_ids,
            fields=["name", "parent", "data", "context"]
        ))

        version_ids = [
            repre_doc["parent"]
            for repre_doc in repre_docs
        ]
        version_docs = get_versions(
            project_name,
            version_ids=version_ids,
            hero=True
        )

        version_docs_by_id = {}
        version_docs_by_subset_id = collections.defaultdict(list)
        for version_doc in version_docs:
            version_id = version_doc["_id"]
            subset_id = version_doc["parent"]
            version_docs_by_id[version_id] = version_doc
            version_docs_by_subset_id[subset_id].append(version_doc)

        subset_docs = list(get_subsets(
            project_name,
            subset_ids=version_docs_by_subset_id.keys(),
            fields=["schema", "data.families"]
        ))
        subset_docs_by_id = {
            subset_doc["_id"]: subset_doc
            for subset_doc in subset_docs
        }
        repre_context_by_id = {}
        for repre_doc in repre_docs:
            version_id = repre_doc["parent"]

            version_doc = version_docs_by_id[version_id]
            repre_context_by_id[repre_doc["_id"]] = {
                "representation": repre_doc,
                "version": version_doc,
                "subset": subset_docs_by_id[version_doc["parent"]]
            }
        return repre_context_by_id

    def get_selected_items(self):
        selection_model = self.tree_view.selectionModel()
        indexes = selection_model.selectedIndexes()

        item_ids = set()
        for index in indexes:
            item_id = index.data(ITEM_ID_ROLE)
            if item_id is not None:
                item_ids.add(item_id)

        output = []
        for item_id in item_ids:
            item = self.model.get_item_by_id(item_id)
            if item is not None:
                output.append(item)
        return output

    def get_selected_repre_items(self):
        output = []
        items = collections.deque(self.get_selected_items())

        item_ids = set()
        while items:
            item = items.popleft()
            if item.get("isGroup") or item.get("isMerged"):
                for child in item.children():
                    items.appendleft(child)
            else:
                item_id = item["id"]
                if item_id not in item_ids:
                    item_ids.add(item_id)
                    output.append(item)
        return output

    def on_context_menu(self, point):
        """Shows menu with loader actions on Right-click.

        Registered actions are filtered by selection and help of
        `loaders_from_representation` from avalon api. Intersection of actions
        is shown when more subset is selected. When there are not available
        actions for selected subsets then special action is shown (works as
        info message to user): "*No compatible loaders for your selection"

        """
        point_index = self.tree_view.indexAt(point)
        if not point_index.isValid():
            return

        # Get selected subsets without groups
        selection = self.tree_view.selectionModel()
        rows = selection.selectedRows(column=0)

        items = self.get_selected_repre_items()
        selected_side = self._get_selected_side(point_index, rows)
        # Get all representation->loader combinations available for the
        # index under the cursor, so we can list the user the options.
        project_name = self.dbcon.active_project()
        available_loaders = discover_loader_plugins(project_name)

        filtered_loaders = []
        for loader in available_loaders:
            if not loader.enabled:
                continue
            # Skip subset loaders
            if issubclass(loader, SubsetLoaderPlugin):
                continue

            if (
                tools_lib.is_sync_loader(loader)
                and not self.sync_server_enabled
            ):
                continue

            filtered_loaders.append(loader)

        if self.tool_name:
            filtered_loaders = lib.remove_tool_name_from_loaders(
                filtered_loaders, self.tool_name
            )

        loaders = list()
        already_added_loaders = set()
        label_already_in_menu = set()

        repre_context_by_id = (
            self._repre_contexts_for_loaders_filter(items)
        )

        for item in items:
            repre_context = repre_context_by_id[item["_id"]]
            for loader in loaders_from_repre_context(
                filtered_loaders,
                repre_context
            ):
                if tools_lib.is_sync_loader(loader):
                    both_unavailable = (
                        item["active_site_progress"] <= 0
                        and item["remote_site_progress"] <= 0
                    )
                    if both_unavailable:
                        continue

                    for selected_side in self.commands.keys():
                        item = item.copy()
                        item["custom_label"] = None
                        label = None
                        selected_site_progress = item.get(
                            "{}_site_progress".format(selected_side), -1)

                        # only remove if actually present
                        if tools_lib.is_remove_site_loader(loader):
                            label = "Remove {}".format(selected_side)
                            if selected_site_progress < 1:
                                continue

                        if tools_lib.is_add_site_loader(loader):
                            label = self.commands[selected_side]
                            if selected_site_progress >= 0:
                                label = 'Re-{} {}'.format(label, selected_side)

                        if not label:
                            continue

                        item["selected_side"] = selected_side
                        item["custom_label"] = label

                        if label not in label_already_in_menu:
                            loaders.append((item, loader))
                            already_added_loaders.add(loader)
                            label_already_in_menu.add(label)

                else:
                    item = item.copy()
                    item["custom_label"] = None

                    if loader not in already_added_loaders:
                        loaders.append((item, loader))
                        already_added_loaders.add(loader)

        loaders = lib.sort_loaders(loaders)

        menu = OptionalMenu(self)
        if not loaders:
            action = lib.get_no_loader_action(menu)
            menu.addAction(action)
        else:
            repre_contexts = get_repres_contexts(
                repre_context_by_id.keys(), self.dbcon)
            menu = lib.add_representation_loaders_to_menu(loaders, menu,
                                                          repre_contexts)

        self._process_action(items, menu, point)

    def _process_action(self, items, menu, point):
        """Show the context action menu and process selected

        Args:
            items(dict): menu items
            menu(OptionalMenu)
            point(PointIndex)
        """
        global_point = self.tree_view.mapToGlobal(point)
        action = menu.exec_(global_point)

        if not action or not action.data():
            return

        self.load_started.emit()

        # Find the representation name and loader to trigger
        action_representation, loader = action.data()
        repre_ids = []
        data_by_repre_id = {}
        selected_side = action_representation.get("selected_side")
        site_name = "{}_site_name".format(selected_side)

        is_sync_loader = tools_lib.is_sync_loader(loader)
        for item in items:
            repre_id = item["_id"]
            repre_ids.append(repre_id)
            if not is_sync_loader:
                continue

            data_site_name = item.get(site_name)
            if not data_site_name:
                continue

            data_by_repre_id[repre_id] = {
                "site_name": data_site_name
            }

        repre_contexts = get_repres_contexts(repre_ids, self.dbcon)
        options = lib.get_options(action, loader, self,
                                  list(repre_contexts.values()))

        errors = _load_representations_by_loader(
            loader, repre_contexts,
            options=options, data_by_repre_id=data_by_repre_id)

        self.model.refresh()

        self.load_ended.emit()

        if errors:
            box = LoadErrorMessageBox(errors, self)
            box.show()

    def _get_optional_labels(self, loaders, selected_side):
        """Each loader could have specific label

            Args:
                loaders (tuple of dict, dict): (item, loader)
                selected_side(string): active or remote

            Returns:
                (dict) {loader: string}
        """
        optional_labels = {}
        if selected_side:
            if selected_side == 'active':
                txt = "Localize"
            else:
                txt = "Sync to Remote"
            optional_labels = {loader: txt for _, loader in loaders
                               if tools_lib.is_sync_loader(loader)}
        return optional_labels

    def _get_selected_side(self, point_index, rows):
        """Returns active/remote label according to column in 'point_index'"""
        selected_side = None
        if self.sync_server_enabled:
            if rows:
                source_index = self.proxy_model.mapToSource(point_index)
                selected_side = self.model.data(source_index,
                                                self.model.SiteSideRole)
        return selected_side

    def set_version_ids(self, version_ids):
        self.model.set_version_ids(version_ids)

    def _set_download(self):
        pass

    def change_visibility(self, column_name, visible):
        """
            Hides or shows particular 'column_name'.

            "asset" and "subset" columns should be visible only in multiselect
        """
        lib.change_visibility(self.model, self.tree_view, column_name, visible)


def _load_representations_by_loader(loader, repre_contexts,
                                    options,
                                    data_by_repre_id=None):
    """Loops through list of repre_contexts and loads them with one loader

        Args:
            loader (cls of LoaderPlugin) - not initialized yet
            repre_contexts (dicts) - full info about selected representations
                (containing repre_doc, version_doc, subset_doc, project info)
            options (dict) - qargparse arguments to fill OptionDialog
            data_by_repre_id (dict) - additional data applicable on top of
                options to provide dynamic values
    """
    error_info = []

    if options is None:  # not load when cancelled
        return

    for repre_context in repre_contexts.values():
        version_doc = repre_context["version"]
        if version_doc["type"] == "hero_version":
            version_name = "Hero"
        else:
            version_name = version_doc.get("name")
        try:
            if data_by_repre_id:
                repre_id = repre_context["representation"]["_id"]
                data = data_by_repre_id.get(repre_id)
                options.update(data)
            load_with_repre_context(
                loader,
                repre_context,
                options=options
            )

        except IncompatibleLoaderError as exc:
            print(exc)
            error_info.append((
                "Incompatible Loader",
                None,
                repre_context["representation"]["name"],
                repre_context["subset"]["name"],
                version_name
            ))

        except Exception as exc:
            formatted_traceback = None
            if not isinstance(exc, LoadError):
                exc_type, exc_value, exc_traceback = sys.exc_info()
                formatted_traceback = "".join(traceback.format_exception(
                    exc_type, exc_value, exc_traceback
                ))

            error_info.append((
                str(exc),
                formatted_traceback,
                repre_context["representation"]["name"],
                repre_context["subset"]["name"],
                version_name
            ))
    return error_info


def _load_subsets_by_loader(loader, subset_contexts, options,
                            subset_version_docs=None):
    """
        Triggers load with SubsetLoader type of loaders

        Args:
            loader (SubsetLoder):
            subset_contexts (list):
            options (dict):
            subset_version_docs (dict): {subset_id: version_doc}
    """
    error_info = []

    if options is None:  # not load when cancelled
        return error_info

    if loader.is_multiple_contexts_compatible:
        subset_names = []
        for context in subset_contexts:
            subset_name = context.get("subset", {}).get("name") or "N/A"
            subset_names.append(subset_name)

            context["version"] = subset_version_docs[context["subset"]["_id"]]
        try:
            load_with_subset_contexts(
                loader,
                subset_contexts,
                options=options
            )

        except Exception as exc:
            formatted_traceback = None
            if not isinstance(exc, LoadError):
                exc_type, exc_value, exc_traceback = sys.exc_info()
                formatted_traceback = "".join(traceback.format_exception(
                    exc_type, exc_value, exc_traceback
                ))
            error_info.append((
                str(exc),
                formatted_traceback,
                None,
                ", ".join(subset_names),
                None
            ))
    else:
        for subset_context in subset_contexts:
            subset_name = subset_context.get("subset", {}).get("name") or "N/A"

            version_doc = subset_version_docs[subset_context["subset"]["_id"]]
            subset_context["version"] = version_doc
            try:
                load_with_subset_context(
                    loader,
                    subset_context,
                    options=options
                )

            except Exception as exc:
                formatted_traceback = None
                if not isinstance(exc, LoadError):
                    exc_type, exc_value, exc_traceback = sys.exc_info()
                    formatted_traceback = "".join(traceback.format_exception(
                        exc_type, exc_value, exc_traceback
                    ))

                error_info.append((
                    str(exc),
                    formatted_traceback,
                    None,
                    subset_name,
                    None
                ))

    return error_info


class AvailabilityDelegate(QtWidgets.QStyledItemDelegate):
    """
        Prints icons and downloaded representation ration for both sides.
    """

    def __init__(self, dbcon, parent=None):
        super(AvailabilityDelegate, self).__init__(parent)
        self.icons = tools_lib.get_repre_icons()

    def paint(self, painter, option, index):
        super(AvailabilityDelegate, self).paint(painter, option, index)
        option = QtWidgets.QStyleOptionViewItem(option)
        option.showDecorationSelected = True

        provider_active = index.data(LOCAL_PROVIDER_ROLE)
        provider_remote = index.data(REMOTE_PROVIDER_ROLE)

        availability_active = index.data(LOCAL_AVAILABILITY_ROLE)
        availability_remote = index.data(REMOTE_AVAILABILITY_ROLE)

        if not availability_active or not availability_remote:  # group lines
            return

        idx = 0
        height = width = 24
        for value, provider in [(availability_active, provider_active),
                                (availability_remote, provider_remote)]:
            icon = self.icons.get(provider)
            if not icon:
                continue

            pixmap = icon.pixmap(icon.actualSize(QtCore.QSize(height, width)))
            padding = 10 + (70 * idx)
            point = QtCore.QPoint(option.rect.x() + padding,
                                  option.rect.y() +
                                  (option.rect.height() - pixmap.height()) / 2)
            painter.drawPixmap(point, pixmap)

            text_rect = option.rect.translated(padding + width + 10, 0)
            painter.drawText(
                text_rect,
                option.displayAlignment,
                value
            )

            idx += 1

    def displayText(self, value, locale):
        pass