Add pagination info view

listframes.lua

@@ -4,8 +4,8 @@ local length = 0
 local frame = term.current()
 local drawEntry = nil
 
--- pagination offset in number of lines (not number of entries!)
-local paginationOffset = 1
+-- pagination start line (not number of entries!)
+local paginationPos = 1
 
 
 local function setDrawEntryFunc(drawLineFunc)
@@ -58,13 +58,13 @@ local function redrawEntry(idx)
         local tw, th = frame.getSize()
         local xPos, yPos = entryFrame.getPosition()
         local xSize, ySize = entryFrame.getSize()
-        entryFrame.setVisible((yPos+ySize-1) >= paginationOffset and yPos <= th)
+        entryFrame.setVisible((yPos+ySize-1) >= paginationPos and yPos <= th)
     end
 end
 
 local function repositionOrCreateEntryFrame(idx)
     local previousFrame = subFrames[idx-1]
-    local yPos = 1
+    local yPos = 2-paginationPos
     if previousFrame ~= nil then
         local xPos
         xPos, yPos = previousFrame.getPosition()
@@ -101,7 +101,7 @@ local function clearFrom(idx)
         end
     end
     length = idx-1
-    for y = idx-paginationOffset+1, th, 1 do
+    for y = idx-paginationPos+1, th, 1 do
         frame.setCursorPos(1, y)
         frame.clearLine()
     end
@@ -110,10 +110,10 @@ end
 local function redraw()
     if drawEntry then
         local tw, th = frame.getSize()
-        local yPos = 1
+        local yPos = 2-paginationPos
         for idx = 1, length, 1 do
             assert(backingList[idx] ~= nil, "nil element at idx="..idx)
-            if yPos < paginationOffset+th then
+            if yPos <= th then
                 repositionOrCreateEntryFrame(idx)
                 redrawEntry(idx)
                 local xSize, ySize = subFrames[idx].getSize()
@@ -135,9 +135,9 @@ local function setTerm(termlike)
     redraw()
 end
 
-local function updatePage(newOffset)
-    if newOffset ~= paginationOffset then
-        paginationOffset = newOffset
+local function updatePage(scrollPos)
+    if scrollPos ~= paginationPos then
+        paginationPos = scrollPos
         redraw()
     end
 end

listview.lua

@@ -1,6 +1,6 @@
 local backingList = {}
 local length = 0
-local paginationOffset = 1
+local paginationPos = 1
 local frame = term.current()
 local drawEntry = nil
 
@@ -14,8 +14,8 @@ end
 
 local function redrawEntry(idx)
     local tw, th = frame.getSize()
-    if idx >= paginationOffset and idx-paginationOffset <= th then
-        frame.setCursorPos(1, idx-paginationOffset+1)
+    if idx >= paginationPos and idx-paginationPos <= th then
+        frame.setCursorPos(1, idx-paginationPos+1)
         if drawEntry then
             drawEntry(frame, backingList[idx])
         else
@@ -44,7 +44,7 @@ local function clearFrom(idx)
         backingList[j] = nil
     end
     length = idx
-    for y = idx-paginationOffset+1, th, 1 do
+    for y = idx-paginationPos+1, th, 1 do
         frame.setCursorPos(1, y)
         frame.clearLine()
     end
@@ -53,7 +53,7 @@ end
 local function redraw()
     if drawEntry then
         local tw, th = frame.getSize()
-        local backingIdx = paginationOffset
+        local backingIdx = paginationPos
         for idx = 1, th, 1 do
             frame.setCursorPos(1, idx)
             if backingList[backingIdx] == nil then
@@ -70,9 +70,9 @@ local function redraw()
     end
 end
 
-local function updatePage(newOffset)
-    if newOffset ~= paginationOffset then
-        paginationOffset = newOffset
+local function updatePage(scrollPos)
+    if scrollPos ~= paginationPos then
+        paginationPos = scrollPos
         redraw()
     end
 end
@@ -80,7 +80,7 @@ end
 local function updatePartial(filter)
     if drawEntry then
         local tw, th = frame.getSize()
-        local backingIdx = paginationOffset
+        local backingIdx = paginationPos
         for idx = 1, th, 1 do
             frame.setCursorPos(1, idx)
             if backingList[backingIdx] ~= nil and filter(backingList[backingIdx]) then

test.lua

@@ -17,9 +17,11 @@ local function display()
     term.setCursorPos(1,1)
     term.setBackgroundColor(colors.yellow)
     term.setTextColor(colors.black)
+    local activeTab = tabview.currentTab()
+    if activeTab ~= nil then
         term.clearLine()
 
-    term.write(" " .. string.upper(tabview.currentTab().name) .. " ")
+        term.write(" " .. string.upper(activeTab.name) .. " ")
         term.setCursorPos(tw-8,1)
         if currently_working then
             term.write(" w ")
@@ -29,13 +31,34 @@ local function display()
         term.write(" ^  v ")
 
         term.setBackgroundColor(colors.black)
-    term.setTextColor(colors.white)
+        term.setTextColor(colors.gray)
         term.setCursorPos(1,2)
+        if tabview_window ~= nil then
+            local tabviewW, tabviewH = tabview_window.getSize()
+            local estimatedHeight = "?"
+            if activeTab.estimatedHeight ~= nil then
+                estimatedHeight = activeTab.estimatedHeight()
+            end
+            local paginationInfo = activeTab.scrollPos .. "-" .. tabviewH .. "/" .. estimatedHeight
+            local padding = winhlp.alignRightPadding(term, #paginationInfo)
+            term.write(string.format("%" .. padding-1 .. "s", " "))
+            term.write(paginationInfo)
+            term.write(" ")
+        else
             term.clearLine()
+        end
+        term.setTextColor(colors.white)
 
         for name, tab in pairs(tabview.allTabs()) do
             tab.displayTab(tab)
         end
+    else
+        term.setBackgroundColor(colors.black)
+        term.clear()
+        term.setBackgroundColor(colors.yellow)
+        term.clearLine()
+        term.write(" NO ACTIVE TAB ")
+    end
 end