From ac811c693005a19e7223de01df5342cfe35f5568 Mon Sep 17 00:00:00 2001
From: Ben Armstrong <synrg@debian.org>
Date: Wed, 21 Aug 2013 18:05:08 -0300
Subject: [PATCH] Initial support for context and focus (see Issue #218).

---
 AUTHORS                        |  1 +
 scripts/bash/context           | 36 ++++++++++++++++++++++++++++++++++
 scripts/bash/focus             |  1 +
 scripts/bash/task_functions.sh | 26 ++++++++++++++++++++++++
 4 files changed, 64 insertions(+)
 create mode 100755 scripts/bash/context
 create mode 120000 scripts/bash/focus
 create mode 100644 scripts/bash/task_functions.sh

diff --git a/AUTHORS b/AUTHORS
index 9fa393fd5..f0a874e6b 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -85,6 +85,7 @@ The following submitted code, packages or analysis, and deserve special thanks:
   Jakub Wilk
   Russell Steicke
   YBSAR
+  Ben Armstrong
 
 Thanks to the following, who submitted detailed bug reports and excellent
 suggestions:
diff --git a/scripts/bash/context b/scripts/bash/context
new file mode 100755
index 000000000..f69dca58d
--- /dev/null
+++ b/scripts/bash/context
@@ -0,0 +1,36 @@
+#!/bin/bash
+# - These filters not modified, as their purpose is for special review
+#   not dependent on context or focus:
+#   - report.all.filter
+#   - report.completed.filter status:completed
+# - What is this -FILTER about in my filters?
+#   - In each filter, we negate a non-existent virtual tag -FILTER that
+#     doesn't change what the filter matches but does add a recognizable
+#     marker. This is used later to substitute the filter with a new one when
+#     it changes.
+#   - CAUTION: do not add any additional (i.e. non-context, non-focus) material
+#     after -FILTER in the report filter variables or else it will be lost next
+#     time the context or focus is changed.
+script_path=$(dirname ${0})
+. "${script_path}/task_functions.sh"
+
+filter_type=$(basename ${0})
+task_config "${filter_type}.current" "${@}"
+context=$(task_get context.current)
+focus=$(task_get focus.current)
+colored_context="$(task_color 'white on red' ${context})"
+colored_focus="$(task_color 'white on blue' ${focus})"
+filter="${context} ${focus}"
+
+filter_vars=$(task_vars filter)
+filter_vars=${filter_vars/report.all.filter/}
+filter_vars=${filter_vars/report.completed.filter/}
+for var in ${filter_vars}; do
+    old_value=$(task_get ${var})
+    old_value=${old_value/%-FILTER*/}
+    task_config ${var} ${old_value} -FILTER ${filter}
+done
+
+task_config "shell.prompt" "${colored_context}:${colored_focus}>"
+
+echo "Filter applied to reports and add: ${filter}"
diff --git a/scripts/bash/focus b/scripts/bash/focus
new file mode 120000
index 000000000..f2159129a
--- /dev/null
+++ b/scripts/bash/focus
@@ -0,0 +1 @@
+context
\ No newline at end of file
diff --git a/scripts/bash/task_functions.sh b/scripts/bash/task_functions.sh
new file mode 100644
index 000000000..f60050e79
--- /dev/null
+++ b/scripts/bash/task_functions.sh
@@ -0,0 +1,26 @@
+CONFIRM_PROMPT='are you sure'
+task_config ()
+{
+    var="${1}"
+    shift
+    value="${@}"
+    echo y | task config $var "$value" | grep -iv "$CONFIRM_PROMPT"
+}
+task_vars ()
+{
+    task _show | grep "^.*${1}.*=" | cut -d'=' -f1
+}
+task_get ()
+{
+    task _show | grep "^${1}=" | cut -d'=' -f2
+}
+task_color ()
+{
+    color="${1}"
+    shift
+    text="${@}"
+    task rc.verbose=nothing rc._forcecolor=yes color ${color} | grep 'task color' | \
+       tail -n 1 | sed -e 's/^  //' -e "s/task color ${color}/${text}/"
+}
+
+