from LaTeXTools.latextools.utils.external_command import external_command

from base_viewer import BaseViewer


class PreviewViewer(BaseViewer):

    def view_file(self, pdf_file, **kwargs):
        keep_focus = kwargs.pop("keep_focus", True)

        command = ["open"]
        if keep_focus:
            command.append("-g")

        command += ["-a", "Preview", pdf_file]

        external_command(command, use_texpath=False)

    def supports_platform(self, platform):
        return platform == "osx"

    def supports_keep_focus(self):
        return True
