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"""QtWebKit implementation of the Port interface."""

import logging
import re
import sys
import os

import webkit

from webkitpy.common.memoized import memoized
from webkitpy.layout_tests.models.test_configuration import TestConfiguration
from webkitpy.layout_tests.port.webkit import WebKitPort


_log = logging.getLogger(__name__)


class QtPort(WebKitPort):
    ALL_VERSIONS = ['linux', 'win', 'mac']
    port_name = "qt"

    def _wk2_port_name(self):
        return "qt-5.0-wk2"

    def _port_flag_for_scripts(self):
        return "--qt"

    @classmethod
    def determine_full_port_name(cls, host, options, port_name):
        if port_name and port_name != cls.port_name:
            return port_name
        return port_name + '-' + host.platform.os_name

    # sys_platform exists only for unit testing.
    def __init__(self, host, port_name, **kwargs):
        WebKitPort.__init__(self, host, port_name, **kwargs)

        # FIXME: This will allow WebKitPort.baseline_search_path and WebKitPort._skipped_file_search_paths
        # to do the right thing, but doesn't include support for qt-4.8 or qt-arm (seen in LayoutTests/platform) yet.
        self._operating_system = port_name.replace('qt-', '')

        # FIXME: Why is this being set at all?
        self._version = self.operating_system()

    def _generate_all_test_configurations(self):
        configurations = []
        for version in self.ALL_VERSIONS:
            for build_type in self.ALL_BUILD_TYPES:
                configurations.append(TestConfiguration(version=version, architecture='x86', build_type=build_type))
        return configurations

    def _build_driver(self):
        # The Qt port builds DRT as part of the main build step
        return True

    def _path_to_driver(self):
        return self._build_path('bin/%s' % self.driver_name())

    def _path_to_image_diff(self):
        return self._build_path('bin/ImageDiff')

    def _path_to_webcore_library(self):
        if self.operating_system() == 'mac':
            return self._build_path('lib/QtWebKit.framework/QtWebKit')
        else:
            return self._build_path('lib/libQtWebKit.so')

    @memoized
    def qt_version(self):
        version = ''
        try:
            for line in self._executive.run_command(['qmake', '-v']).split('\n'):
                match = re.search('Qt\sversion\s(?P<version>\d\.\d)', line)
                if match:
                    version = match.group('version')
                    break
        except OSError:
            version = '4.8'
        return version

    def baseline_search_path(self):
        search_paths = []
        if self.get_option('webkit_test_runner'):
            search_paths.append(self._wk2_port_name())
        search_paths.append(self.name())
        version = self.qt_version()
        if '4.8' in version:
            search_paths.append('qt-4.8')
        elif version:
            search_paths.append('qt-5.0')
        search_paths.append(self.port_name)
        return map(self._webkit_baseline_path, search_paths)

    def _skipped_file_search_paths(self):
        search_paths = set([self.port_name, self.name()])
        version = self.qt_version()
        if '4.8' in version:
            search_paths.add('qt-4.8')
        elif version:
            search_paths.add('qt-5.0')
            if self.get_option('webkit_test_runner'):
                search_paths.update(['qt-5.0-wk2', 'wk2'])
            else:
                search_paths.add('qt-5.0-wk1')
        return search_paths

    def setup_environ_for_server(self, server_name=None):
        clean_env = WebKitPort.setup_environ_for_server(self, server_name)
        clean_env['QTWEBKIT_PLUGIN_PATH'] = self._build_path('lib/plugins')
        self._copy_value_from_environ_if_set(clean_env, 'QT_DRT_WEBVIEW_MODE')
        return clean_env

    # FIXME: We should find a way to share this implmentation with Gtk,
    # or teach run-launcher how to call run-safari and move this down to WebKitPort.
    def show_results_html_file(self, results_filename):
        run_launcher_args = []
        if self.get_option('webkit_test_runner'):
            run_launcher_args.append('-2')
        run_launcher_args.append("file://%s" % results_filename)
        self._run_script("run-launcher", run_launcher_args)

    def operating_system(self):
        return self._operating_system

    def check_sys_deps(self, needs_http):
        result = super(QtPort, self).check_sys_deps(needs_http)
        if not 'WEBKIT_TESTFONTS' in os.environ:
            _log.error('\nThe WEBKIT_TESTFONTS environment variable is not defined or not set properly.')
            _log.error('You must set it before running the tests.')
            _log.error('Use git to grab the actual fonts from http://gitorious.org/qtwebkit/testfonts')
            return False
        return result