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"""
This file provides support for displaying Ada preprocessing code as generated
by GNAT (-gnateG switch).
"""
import os
import distutils.dep_util
import GPS
from gps_utils import in_ada_file, interactive, hook
inactive_code_pref = GPS.Preference("Editor/Fonts & Colors:" +
"General/preprocessor")
# Preference used for the display of the inactive code
@hook("preferences_changed")
def __on_preferences_changed():
for srcbuf in GPS.EditorBuffer.list():
if hasattr(srcbuf, "gnatprep_overlay"):
style, fg, bg = inactive_code_pref.get().split("@")
if style != "DEFAULT":
srcbuf.gnatprep_overlay.set_property("style", style.lower())
srcbuf.gnatprep_overlay.set_property("foreground", fg)
srcbuf.gnatprep_overlay.set_property("background", bg)
def create_overlay(file_name):
"""Create a new overlay"""
srcbuf = GPS.EditorBuffer.get(GPS.File(file_name))
overlay = srcbuf.create_overlay("Inactive code")
style, fg, bg = inactive_code_pref.get().split("@")
if style != "DEFAULT":
overlay.set_property("style", style.lower())
overlay.set_property("foreground", fg)
overlay.set_property("background", bg)
srcbuf.gnatprep_overlay = overlay
def subprogram_bounds(cursor):
"""Return the first and last line of the current subprogram, and (0,0) if
the current subprogram could not be determined."""
blocks = {"CAT_PROCEDURE": 1, "CAT_FUNCTION": 1, "CAT_ENTRY": 1,
"CAT_PROTECTED": 1, "CAT_TASK": 1, "CAT_PACKAGE": 1}
if cursor.block_type() == "CAT_UNKNOWN":
return 0, 0
min = cursor.buffer().beginning_of_buffer()
while not (cursor.block_type() in blocks) and cursor > min:
cursor = cursor.block_start() - 1
if cursor > min:
return cursor.block_start_line(), cursor.block_end_line()
else:
return 0, 0
def reset_state(file_name):
"""Reset the state of the file and delete the overlay"""
srcbuf = GPS.EditorBuffer.get(GPS.File(file_name))
if hasattr(srcbuf, "gnatprep_overlay"):
srcbuf.remove_overlay(srcbuf.gnatprep_overlay)
def get_prep_file(for_subprogram=False, reset=False):
"""Retreive the .prep file in the project"""
context = GPS.current_context()
local_file = context.file().path
file = context.file().name("Build_Server")
if context.project():
list_dir = context.project().object_dirs(False)
else:
list_dir = GPS.Project.root().object_dirs(False)
if list_dir:
objdir = list_dir[0]
else:
objdir = GPS.get_tmp_dir()
GPS.Console("Messages").write(
"Could not find an object directory for %s, reverting to %s" %
(file, objdir))
prep_file = os.path.join(objdir, os.path.basename(local_file)) + ".prep"
return local_file, prep_file
def show_inactive_code(file_name, prep_name, for_subprogram=False):
"""Parse the file prep_name and show the inactive code"""
# Explain to the user how to generate the .prep file
if not os.path.isfile(prep_name):
GPS.Console("Messages").write("No preprocessing data file " +
str(prep_name) +
" found: The project must be compiled " +
"with -gnateG to generate .prep file.\n",
mode="error")
# Do nothing is the .prep file is too old
elif distutils.dep_util.newer(file_name, prep_name):
GPS.Console("Messages").write("The .prep file is too old," +
" please recompile the ada file.\n",
mode="error")
else:
reset_state(file_name)
srcbuf = GPS.EditorBuffer.get(GPS.File(file_name))
if for_subprogram:
block_first, block_last = subprogram_bounds(
srcbuf.current_view().cursor())
else:
block_first, block_last = (0, 0)
# Get the text
prep_file = open(prep_name)
prep_text = prep_file.read()
prep_file.close()
# The file start at the line 1
current_line = 1
create_overlay(file_name)
for line in prep_text.splitlines():
if line.startswith("--! "):
if (block_first == 0 or
(block_first < current_line <= block_last)):
frm = srcbuf.at(current_line, 1)
to = frm.end_of_line()
srcbuf.apply_overlay(srcbuf.gnatprep_overlay, frm, to)
current_line += 1
#################################
# Register the contextual menus #
#################################
@interactive("Ada", in_ada_file,
contextual="Preprocessing/Show subprogram",
name="Show inactive code for subprogram", before="Align")
def show_inactive_subprogram():
"""Show the file state after the preprocessing"""
file_name, prep_name = get_prep_file(for_subprogram=True)
show_inactive_code(file_name, prep_name, for_subprogram=True)
@interactive("Ada", in_ada_file,
contextual="Preprocessing/Show entire file",
name="Show inactive code for file", before="Align")
def show_inactive_file():
"""Show the subprogram state after the preprocessing"""
file_name, prep_name = get_prep_file()
show_inactive_code(file_name, prep_name)
@interactive("Ada", in_ada_file,
contextual="Preprocessing/Clear",
name="Clear inactive code display", before="Align")
def clear_display():
"""Clear the preprocessing display"""
file_name, _ = get_prep_file()
reset_state(file_name)
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