254 lines
8.5 KiB
Lua
254 lines
8.5 KiB
Lua
---------------------------------------------------------------------------
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--- (Deprecated) class module for icon lookup for menubar
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--
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-- @author Kazunobu Kuriyama
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-- @copyright 2015 Kazunobu Kuriyama
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-- @classmod menubar.icon_theme
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---------------------------------------------------------------------------
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-- This implementation is based on the specifications:
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-- Icon Theme Specification 0.12
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-- http://standards.freedesktop.org/icon-theme-spec/icon-theme-spec-0.12.html
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local beautiful = require("beautiful")
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local gfs = require("gears.filesystem")
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local GLib = require("lgi").GLib
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local index_theme = require("menubar.index_theme")
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local ipairs = ipairs
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local setmetatable = setmetatable
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local string = string
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local table = table
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local math = math
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local get_pragmatic_base_directories = function()
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local dirs = {}
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local dir = GLib.build_filenamev({GLib.get_home_dir(), ".icons"})
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if gfs.dir_readable(dir) then
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table.insert(dirs, dir)
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end
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dir = GLib.build_filenamev({GLib.get_user_data_dir(), "icons"})
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if gfs.dir_readable(dir) then
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table.insert(dirs, dir)
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end
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for _, v in ipairs(GLib.get_system_data_dirs()) do
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dir = GLib.build_filenamev({v, "icons"})
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if gfs.dir_readable(dir) then
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table.insert(dirs, dir)
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end
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end
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local need_usr_share_pixmaps = true
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for _, v in ipairs(GLib.get_system_data_dirs()) do
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dir = GLib.build_filenamev({v, "pixmaps"})
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if gfs.dir_readable(dir) then
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table.insert(dirs, dir)
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end
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if dir == "/usr/share/pixmaps" then
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need_usr_share_pixmaps = false
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end
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end
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dir = "/usr/share/pixmaps"
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if need_usr_share_pixmaps and gfs.dir_readable(dir) then
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table.insert(dirs, dir)
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end
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return dirs
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end
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local get_default_icon_theme_name = function()
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local icon_theme_names = { "Adwaita", "gnome", "hicolor" }
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for _, dir in ipairs(get_pragmatic_base_directories()) do
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for _, icon_theme_name in ipairs(icon_theme_names) do
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local filename = string.format("%s/%s/index.theme", dir, icon_theme_name)
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if gfs.file_readable(filename) then
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return icon_theme_name
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end
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end
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end
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return "hicolor"
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end
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local icon_theme = { mt = {} }
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local index_theme_cache = {}
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--- Class constructor of `icon_theme`
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-- @deprecated menubar.icon_theme.new
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-- @tparam string icon_theme_name Internal name of icon theme
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-- @tparam table base_directories Paths used for lookup
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-- @treturn table An instance of the class `icon_theme`
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icon_theme.new = function(icon_theme_name, base_directories)
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icon_theme_name = icon_theme_name or beautiful.icon_theme or get_default_icon_theme_name()
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base_directories = base_directories or get_pragmatic_base_directories()
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local self = {}
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self.icon_theme_name = icon_theme_name
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self.base_directories = base_directories
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self.extensions = { "png", "svg", "xpm" }
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-- Instantiate index_theme (cached).
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if not index_theme_cache[self.icon_theme_name] then
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index_theme_cache[self.icon_theme_name] = {}
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end
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local cache_key = table.concat(self.base_directories, ':')
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if not index_theme_cache[self.icon_theme_name][cache_key] then
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index_theme_cache[self.icon_theme_name][cache_key] = index_theme(
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self.icon_theme_name,
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self.base_directories)
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end
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self.index_theme = index_theme_cache[self.icon_theme_name][cache_key]
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return setmetatable(self, { __index = icon_theme })
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end
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local directory_matches_size = function(self, subdirectory, icon_size)
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local kind, size, min_size, max_size, threshold = self.index_theme:get_per_directory_keys(subdirectory)
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if kind == "Fixed" then
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return icon_size == size
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elseif kind == "Scalable" then
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return icon_size >= min_size and icon_size <= max_size
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elseif kind == "Threshold" then
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return icon_size >= size - threshold and icon_size <= size + threshold
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end
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return false
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end
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local directory_size_distance = function(self, subdirectory, icon_size)
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local kind, size, min_size, max_size, threshold = self.index_theme:get_per_directory_keys(subdirectory)
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if kind == "Fixed" then
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return math.abs(icon_size - size)
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elseif kind == "Scalable" then
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if icon_size < min_size then
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return min_size - icon_size
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elseif icon_size > max_size then
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return icon_size - max_size
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end
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return 0
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elseif kind == "Threshold" then
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if icon_size < size - threshold then
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return min_size - icon_size
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elseif icon_size > size + threshold then
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return icon_size - max_size
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end
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return 0
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end
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return 0xffffffff -- Any large number will do.
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end
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local lookup_icon = function(self, icon_name, icon_size)
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local checked_already = {}
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for _, subdir in ipairs(self.index_theme:get_subdirectories()) do
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for _, basedir in ipairs(self.base_directories) do
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for _, ext in ipairs(self.extensions) do
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if directory_matches_size(self, subdir, icon_size) then
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local filename = string.format("%s/%s/%s/%s.%s",
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basedir, self.icon_theme_name, subdir,
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icon_name, ext)
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if gfs.file_readable(filename) then
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return filename
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else
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checked_already[filename] = true
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end
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end
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end
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end
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end
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local minimal_size = 0xffffffff -- Any large number will do.
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local closest_filename = nil
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for _, subdir in ipairs(self.index_theme:get_subdirectories()) do
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local dist = directory_size_distance(self, subdir, icon_size)
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if dist < minimal_size then
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for _, basedir in ipairs(self.base_directories) do
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for _, ext in ipairs(self.extensions) do
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local filename = string.format("%s/%s/%s/%s.%s",
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basedir, self.icon_theme_name, subdir,
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icon_name, ext)
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if not checked_already[filename] then
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if gfs.file_readable(filename) then
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closest_filename = filename
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minimal_size = dist
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end
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end
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end
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end
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end
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end
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return closest_filename
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end
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local find_icon_path_helper -- Gets called recursively.
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find_icon_path_helper = function(self, icon_name, icon_size)
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local filename = lookup_icon(self, icon_name, icon_size)
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if filename then
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return filename
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end
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for _, parent in ipairs(self.index_theme:get_inherits()) do
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local parent_icon_theme = icon_theme(parent, self.base_directories)
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filename = find_icon_path_helper(parent_icon_theme, icon_name, icon_size)
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if filename then
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return filename
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end
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end
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return nil
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end
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local lookup_fallback_icon = function(self, icon_name)
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for _, dir in ipairs(self.base_directories) do
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for _, ext in ipairs(self.extensions) do
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local filename = string.format("%s/%s.%s",
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dir,
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icon_name, ext)
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if gfs.file_readable(filename) then
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return filename
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end
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end
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end
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return nil
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end
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--- Look up an image file based on a given icon name and/or a preferable size.
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-- @deprecated menubar.icon_theme:find_icon_path
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-- @tparam string icon_name Icon name to be looked up
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-- @tparam number icon_size Prefereable icon size
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-- @treturn string Absolute path to the icon file, or nil if not found
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function icon_theme:find_icon_path(icon_name, icon_size)
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icon_size = icon_size or 16
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if not icon_name or icon_name == "" then
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return nil
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end
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local filename = find_icon_path_helper(self, icon_name, icon_size)
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if filename then
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return filename
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end
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if self.icon_theme_name ~= "hicolor" then
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filename = find_icon_path_helper(icon_theme("hicolor", self.base_directories), icon_name, icon_size)
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if filename then
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return filename
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end
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end
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return lookup_fallback_icon(self, icon_name)
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end
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icon_theme.mt.__call = function(_, ...)
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return icon_theme.new(...)
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end
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return setmetatable(icon_theme, icon_theme.mt)
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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