[volume] BREAKING CHANGE - new widget instead of old ones

Having three widgets for volume led to a problem of code duplication -
same logic was duplicated three times. However when an issue was
discovered and fixed, it was fixed in only one of three widgets.
So I decided to create a volume widget from scratch, adding new
features, such as selecting input/output, better responsiveness,
easily customizable widget ui (bar, text, icon, icon and text, arc).
Should close #199, #198, #185, #182, #47, #122, #183.

1 files changed, 105 insertions, 0 deletions

diff --git a/volume-widget/utils.lua b/volume-widget/utils.lua
new file mode 100644
index 0000000..417a666
--- /dev/null
+++ b/volume-widget/utils.lua
@@ -0,0 +1,105 @@
+
+
+local utils = {}
+
+local function split(string_to_split, separator)
+    if separator == nil then separator = "%s" end
+    local t = {}
+
+    for str in string.gmatch(string_to_split, "([^".. separator .."]+)") do
+        table.insert(t, str)
+    end
+
+    return t
+end
+
+function utils.extract_sinks_and_sources(pacmd_output)
+    local sinks = {}
+    local sources = {}
+    local device
+    local properties
+    local ports
+    local in_sink = false
+    local in_source = false
+    local in_device = false
+    local in_properties = false
+    local in_ports = false
+    for line in pacmd_output:gmatch("[^\r\n]+") do
+        if string.match(line, 'source%(s%) available.') then
+            in_sink = false
+            in_source = true
+        end
+        if string.match(line, 'sink%(s%) available.') then
+            in_sink = true
+            in_source = false
+        end
+
+        if string.match(line, 'index:') then
+            in_device = true
+            in_properties = false
+            device = {
+                id = line:match(': (%d+)'),
+                is_default = string.match(line, '*') ~= nil
+            }
+            if in_sink then
+                table.insert(sinks, device)
+            elseif in_source then
+                table.insert(sources, device)
+            end
+        end
+
+        if string.match(line, '^\tproperties:') then
+            in_device = false
+            in_properties = true
+            properties = {}
+            device['properties'] = properties
+        end
+
+        if string.match(line, 'ports:') then
+            in_device = false
+            in_properties = false
+            in_ports = true
+            ports = {}
+            device['ports'] = ports
+        end
+
+        if string.match(line, 'active port:') then
+            in_device = false
+            in_properties = false
+            in_ports = false
+            device['active_port'] = line:match(': (.+)'):gsub('<',''):gsub('>','')
+        end
+
+        if in_device then
+            local t = split(line, ': ')
+            local key = t[1]:gsub('\t+', ''):lower()
+            local value = t[2]:gsub('^<', ''):gsub('>$', '')
+            device[key] = value
+        end
+
+        if in_properties then
+            local t = split(line, '=')
+            local key = t[1]:gsub('\t+', ''):gsub('%.', '_'):gsub('-', '_'):gsub(':', ''):gsub("%s+$", "")
+            local value
+            if t[2] == nil then
+                value = t[2]
+            else
+                value = t[2]:gsub('"', ''):gsub("^%s+", ""):gsub(' Analog Stereo', '')
+            end
+            properties[key] = value
+        end
+
+        if in_ports then
+            local t = split(line, ': ')
+            local key = t[1]
+            if key ~= nil then
+                key = key:gsub('\t+', '')
+            end
+            ports[key] = t[2]
+        end
+    end
+
+    return sinks, sources
+end
+
+return utils
\ No newline at end of file