forked from Support/sp-hydra-veil-gui
74 lines
2.7 KiB
Python
Executable file
74 lines
2.7 KiB
Python
Executable file
import importlib
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import time
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import traceback
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from gui.v2.infrastructure.page_registry import PAGE_REGISTRY, ASYNC_PREPARE
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class Navigator:
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def __init__(self, page_stack, custom_window):
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self.page_stack = page_stack
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self.custom_window = custom_window
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self._instances = {}
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def get_class(self, name):
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module_path, class_name = PAGE_REGISTRY[name]
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module = importlib.import_module(module_path)
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return getattr(module, class_name)
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def _instantiate(self, name, prepared=None):
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cls = self.get_class(name)
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if name in ASYNC_PREPARE:
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return cls(self.page_stack, self.custom_window, prepared=prepared)
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return cls(self.page_stack, self.custom_window)
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def register_instance(self, name, page):
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self.page_stack.addWidget(page)
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self._instances[name] = page
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def navigate(self, name):
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page = self._instances.get(name)
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if page is None:
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if name not in PAGE_REGISTRY:
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self._warn_not_migrated(name)
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return
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page = self._instantiate(name)
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self.register_instance(name, page)
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self.page_stack.setCurrentIndex(self.page_stack.indexOf(page))
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def preload(self, name):
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if name in self._instances:
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print(f"[preload] {name:30s} SKIP (already cached)", flush=True)
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return False
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if name not in PAGE_REGISTRY:
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print(f"[preload] {name:30s} SKIP (not in registry)", flush=True)
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return False
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module_path, class_name = PAGE_REGISTRY[name]
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print(f"[preload] {name:30s} LOAD {module_path}.{class_name}", flush=True)
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t0 = time.perf_counter()
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try:
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page = self._instantiate(name)
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self.register_instance(name, page)
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dt_ms = (time.perf_counter() - t0) * 1000.0
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print(f"[preload] {name:30s} OK ({dt_ms:6.1f} ms, "
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f"cached={len(self._instances)}, stack_size={self.page_stack.count()})",
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flush=True)
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return True
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except Exception as e:
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dt_ms = (time.perf_counter() - t0) * 1000.0
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print(f"[preload] {name:30s} FAIL ({dt_ms:6.1f} ms) "
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f"{type(e).__name__}: {e}", flush=True)
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traceback.print_exc()
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from core.errors.logger import logger as core_logger
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core_logger.warning(f"Background preload failed for '{name}': "
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f"{type(e).__name__}: {e}")
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return False
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def get_cached(self, name):
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return self._instances.get(name)
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def _warn_not_migrated(self, name):
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try:
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self.custom_window.update_status(f"Page '{name}' not migrated yet.")
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except Exception:
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pass
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