benilla-octo/crates/benilla-app/assets/ui/ScriptLogFrame.xml

<Ui>
    <!--
        benilla's **script error log** (decision 1495) — the window B293 asked for, and it is
        entirely OURS: 1.12 has no counterpart, so every name here wears the `Benilla` prefix (1254's
        rule, `tests::reference_surface`'s gate).

        ## Why it exists beside `ScriptErrors`

        `BasicControls.xml`'s red `ScriptErrors` dialog is the reference's whole answer to a Lua
        fault, transcribed and installed by 1305 — and it stays exactly as it is. It shows **one**
        message, because `_ERRORMESSAGE` guards on `ScriptErrors:IsVisible()`, and it remembers
        nothing. Two reporters said so within days of it shipping: Goudy, *minutes after
        screenshotting that dialog working*, *"some kind of lua error frame probably needs to be
        implemented, as there are a lot of addons that still doesn't work"*; nazriel_0, *"probably we
        should start using something like Bug Grabber to report those stack traces better"*.

        So: the dialog is the interrupt, this is the log. Additive, no divergence — the reference
        simply never had this instrument.

        ## Shape

        `CraftFrame.xml`'s shape, which is the house idiom for "windowed panel, faux-scrolled row
        list, detail pane that repaints on selection": 13 fixed 16px rows over a
        `FauxScrollFrameTemplate`, and a **real** `<ScrollFrame>` detail pane below (the real kit,
        not the faux one — a message is a `mlua` error string with its `stack traceback:` tail
        attached, so the detail is genuinely variable-height content, which is what the real kit is
        for; `GossipFrame.xml`'s greeting pane is the same wiring).

        The window is registered in `UIPanelWindows` (`UiPanels.xml`), which is what seats it in the
        left slot and gets it closed by `CloseAllWindows()` — i.e. by ESC — with no code here. Our
        own toplevels deliberately stay OUT of `UISpecialFrames`: that table is the addons' (0544's
        note, 1206).

        ## Reading the model

        Three engine reads, all from the retained log on the model
        (`benilla_ui::script::diagnostics`): `BenillaGetNumScriptErrors()` →
        `retained, totalEverRecorded`; `BenillaGetScriptErrorInfo(i)` → `seq, kind, message, count`
        (1-based, oldest first, nil past the end); `BenillaClearScriptErrors()`. There is no per-frame
        feed and nothing to keep in step — the window polls the log it is a view of.
    -->
    <Script><![CDATA[
        BENILLA_SCRIPTLOG_ROWS = 13
        BENILLA_SCRIPTLOG_ROW_HEIGHT = 16
        -- How much of a message a ROW shows. The full text is the detail pane's job; a row is an
        -- index, and a row that wraps would break the fixed-height list the faux kit requires.
        BENILLA_SCRIPTLOG_ROW_CHARS = 52

        -- Which row is selected (a `seq`, not an index — indices shift when the cap evicts, and a
        -- selection that silently slides onto a different error is worse than one that goes away).
        BenillaScriptLogSelected = nil

        -- The first line of a message, trimmed to a row's width. A traceback's later lines are
        -- indented continuations; on one row they read as noise.
        function BenillaScriptLog_RowText(message)
            local cut = strfind(message, "\n", 1, 1)
            local head = message
            if cut then head = strsub(message, 1, cut - 1) end
            if strlen(head) > BENILLA_SCRIPTLOG_ROW_CHARS then
                head = strsub(head, 1, BENILLA_SCRIPTLOG_ROW_CHARS - 3) .. "..."
            end
            return head
        end

        -- `load` rows are red and `error` rows amber, and the split is by CONSEQUENCE: a `load` row
        -- means an addon is not running at all, which is the thing the player can act on. Colours
        -- come from the shipped tables so this window matches the rest of the UI.
        function BenillaScriptLog_RowColor(kind)
            if kind == "load" then return 1.0, 0.3, 0.3 end
            return 1.0, 0.82, 0.0
        end

        function BenillaScriptLog_Update()
            local shown, total = BenillaGetNumScriptErrors()

            -- The summary line carries the one number a bug report needs and the window cannot
            -- otherwise show: how many were DROPPED. `total` counts distinct failures ever
            -- recorded; `shown` is what survived the cap.
            local summary
            if total == 0 then
                summary = "No errors this session."
            elseif total > shown then
                summary = format("%d errors (%d older not kept)", total, total - shown)
            elseif total == 1 then
                summary = "1 error"
            else
                summary = format("%d errors", total)
            end
            getglobal("BenillaScriptLogSummary"):SetText(summary)

            local scrollFrame = getglobal("BenillaScriptLogListScrollFrame")
            FauxScrollFrame_Update(scrollFrame, shown, BENILLA_SCRIPTLOG_ROWS, BENILLA_SCRIPTLOG_ROW_HEIGHT)
            local offset = FauxScrollFrame_GetOffset(scrollFrame)

            local selectedRow = nil
            for i = 1, BENILLA_SCRIPTLOG_ROWS do
                local button = getglobal("BenillaScriptLogRow" .. i)
                local index = offset + i
                local seq, kind, message, count = BenillaGetScriptErrorInfo(index)
                if seq then
                    button.seq = seq
                    button.message = message
                    -- The count rides the index, not the text: `#12 x1113` says "this is one
                    -- failure that happened 1,113 times", which is the whole reason the log
                    -- deduplicates instead of listing 1,113 rows.
                    local label = "#" .. seq
                    if count > 1 then label = label .. " x" .. count end
                    button.index:SetText(label)
                    button.label:SetText(BenillaScriptLog_RowText(message))
                    button.label:SetTextColor(BenillaScriptLog_RowColor(kind))
                    button:Show()
                    if seq == BenillaScriptLogSelected then selectedRow = button end
                else
                    button.seq = nil
                    button.message = nil
                    button:Hide()
                end
            end

            -- The moving highlight, seated onto the selected row only when that row is on screen —
            -- scrolling the selection away hides the glow rather than stranding it (CraftFrame's
            -- own behaviour).
            local highlight = getglobal("BenillaScriptLogHighlightFrame")
            if selectedRow then
                highlight:SetPoint("TOPLEFT", selectedRow:GetName(), "TOPLEFT", 0, 0)
                highlight:Show()
            else
                highlight:Hide()
            end

            BenillaScriptLog_UpdateDetail()
        end

        -- The detail pane: the FULL message of the selected row, traceback and all. Selection is by
        -- `seq`, so this walks the log rather than indexing it.
        function BenillaScriptLog_UpdateDetail()
            local text = ""
            if BenillaScriptLogSelected then
                local shown = BenillaGetNumScriptErrors()
                for i = 1, shown do
                    local seq, _, message = BenillaGetScriptErrorInfo(i)
                    if seq == BenillaScriptLogSelected then
                        text = message
                        break
                    end
                end
            end
            if text == "" then
                text = "Select an error above to read it in full."
            end
            getglobal("BenillaScriptLogDetailText"):SetText(text)
        end

        -- Frame-late by nature (the shared kit's own note): text rects resolve after Lua runs, so
        -- the child is re-measured from OnUpdate until it stops changing, after which this is a
        -- no-op compare per frame. OnUpdate only fires on visible frames, so a closed window costs
        -- nothing.
        function BenillaScriptLogFrame_OnUpdate()
            BenillaScroll_ResizeChild("BenillaScriptLogDetailScroll", { "BenillaScriptLogDetailText" })
        end

        function BenillaScriptLogRow_OnClick(button)
            if not button.seq then return end
            -- Clicking the selected row deselects: the detail pane is a drawer, and a list with no
            -- way back to "nothing selected" is a small trap.
            if BenillaScriptLogSelected == button.seq then
                BenillaScriptLogSelected = nil
            else
                BenillaScriptLogSelected = button.seq
            end
            BenillaScriptLog_Update()
        end

        function BenillaScriptLogFrame_OnLoad(self)
            getglobal("BenillaScriptLogListScrollFrame").updateFunc = BenillaScriptLog_Update
            -- The ring's icon, through the portrait verb rather than left at its `file=` — see the
            -- texture's own note. MailFrame.xml's open-letter icon is the same fix.
            SetPortraitToTexture("BenillaScriptLogFramePortrait",
                "Interface\\Icons\\INV_Misc_Note_01")
        end

        -- The shared helper steps the faux frame's bar, whose OnValueChanged runs the kit's
        -- offset handler and thence `updateFunc` — so the repaint is wired once, at OnLoad, and
        -- not repeated here.
        function BenillaScriptLogFrame_OnMouseWheel(delta)
            BenillaFauxScrollFrame_OnMouseWheel(getglobal("BenillaScriptLogListScrollFrame"), delta)
        end

        -- ── The three entry points the client and the player reach this by ────────────────────

        function BenillaScriptLog_Toggle()
            local frame = getglobal("BenillaScriptLogFrame")
            if frame:IsVisible() then
                HideUIPanel(frame)
            else
                ShowUIPanel(frame)
            end
        end

        -- `/errors clear`. Forgets the rows, keeps the numbering (the engine's own rule — a number
        -- must never name two different failures across a screenshot). Prints a confirmation
        -- because a command whose whole effect is "a window you may not have open is now empty"
        -- is otherwise indistinguishable from a typo.
        function BenillaScriptLog_Clear()
            BenillaClearScriptErrors()
            BenillaScriptLogSelected = nil
            if getglobal("BenillaScriptLogFrame"):IsVisible() then
                BenillaScriptLog_Update()
            end
            DEFAULT_CHAT_FRAME:AddMessage("Script error log cleared.", 1.0, 1.0, 0.0)
        end
    ]]></Script>

    <!-- One list row: the `#N xCount` index column, then the message head. Same shape as
         BenillaCraftSkillButtonTemplate (fixed columns — this engine has no FontString-width-based
         dynamic anchor). -->
    <Button name="BenillaScriptLogRowTemplate" virtual="true" hidden="true">
        <Size><AbsDimension x="293" y="16"/></Size>
        <Layers>
            <Layer level="ARTWORK">
                <FontString name="$parentIndex" inherits="GameFontNormalSmall" justifyH="LEFT">
                    <Size><AbsDimension x="56" y="16"/></Size>
                    <Anchors><Anchor point="LEFT" relativePoint="LEFT"><Offset><AbsDimension x="4" y="0"/></Offset></Anchor></Anchors>
                </FontString>
                <FontString name="$parentLabel" inherits="GameFontNormalSmall" justifyH="LEFT">
                    <Size><AbsDimension x="229" y="16"/></Size>
                    <Anchors><Anchor point="LEFT" relativePoint="LEFT"><Offset><AbsDimension x="62" y="0"/></Offset></Anchor></Anchors>
                </FontString>
            </Layer>
        </Layers>
        <HighlightTexture file="Interface\Buttons\UI-Listbox-Highlight2" alphaMode="ADD"/>
        <Scripts>
            <OnLoad>
                self.index = getglobal(self:GetName() .. "Index")
                self.label = getglobal(self:GetName() .. "Label")
            </OnLoad>
            <OnClick>BenillaScriptLogRow_OnClick(self)</OnClick>
        </Scripts>
    </Button>

    <Frame name="BenillaScriptLogFrame" hidden="true">
        <!-- 384x512, the standard left-slot panel size. No <Anchors>: ShowUIPanel seats it. -->
        <Size><AbsDimension x="384" y="512"/></Size>
        <Layers>
            <Layer level="BACKGROUND">
                <!-- The same square ITEM icon the mail window's ring holds, and it needs the same
                     portrait verb for the same reason (`SetPortraitToTexture` in OnLoad below):
                     `file=` alone draws it unmasked and its corners show through the ring's
                     transparent ones. -->
                <Texture name="BenillaScriptLogFramePortrait" file="Interface\Icons\INV_Misc_Note_01">
                    <Size><AbsDimension x="60" y="60"/></Size>
                    <Anchors><Anchor point="TOPLEFT"><Offset><AbsDimension x="7" y="-6"/></Offset></Anchor></Anchors>
                </Texture>
            </Layer>
            <!-- The four quadrant slabs. The ClassTrainer family, all four, because it is the one
                 UNIFORM set in the 1.12 art (CraftFrame's own note) and this window belongs to no
                 profession — borrowing a themed half would make it look like a window it isn't. -->
            <Layer level="BORDER">
                <Texture file="Interface\ClassTrainerFrame\UI-ClassTrainer-TopLeft"><Size><AbsDimension x="256" y="256"/></Size><Anchors><Anchor point="TOPLEFT"/></Anchors></Texture>
                <Texture file="Interface\ClassTrainerFrame\UI-ClassTrainer-TopRight"><Size><AbsDimension x="128" y="256"/></Size><Anchors><Anchor point="TOPRIGHT"/></Anchors></Texture>
                <Texture file="Interface\ClassTrainerFrame\UI-ClassTrainer-BotLeft"><Size><AbsDimension x="256" y="256"/></Size><Anchors><Anchor point="BOTTOMLEFT"/></Anchors></Texture>
                <Texture file="Interface\ClassTrainerFrame\UI-ClassTrainer-BotRight"><Size><AbsDimension x="128" y="256"/></Size><Anchors><Anchor point="BOTTOMRIGHT"/></Anchors></Texture>
                <FontString name="BenillaScriptLogTitle" inherits="GameFontNormal" justifyH="CENTER" text="Script Errors">
                    <Anchors><Anchor point="TOP" relativePoint="TOP"><Offset><AbsDimension x="0" y="-17"/></Offset></Anchor></Anchors>
                </FontString>
                <!-- The summary line, and the ONLY place the dropped-row count can be told. -->
                <FontString name="BenillaScriptLogSummary" inherits="GameFontHighlightSmall" justifyH="LEFT" text="">
                    <Anchors><Anchor point="TOPLEFT" relativePoint="TOPLEFT"><Offset><AbsDimension x="26" y="-76"/></Offset></Anchor></Anchors>
                </FontString>
            </Layer>
        </Layers>
        <Frames>
            <!-- The top-right X. This engine ships no UIPanelCloseButton; the minimize-button art
                 stands in, MacroFrame/TrainerFrame's precedent. -->
            <Button name="BenillaScriptLogCloseButton">
                <Size><AbsDimension x="32" y="32"/></Size>
                <Anchors><Anchor point="TOPRIGHT"><Offset><AbsDimension x="-29" y="-8"/></Offset></Anchor></Anchors>
                <NormalTexture file="Interface\Buttons\UI-Panel-MinimizeButton-Up"/>
                <PushedTexture file="Interface\Buttons\UI-Panel-MinimizeButton-Down"/>
                <HighlightTexture file="Interface\Buttons\UI-Panel-MinimizeButton-Highlight" alphaMode="ADD"/>
                <Scripts><OnClick>HideUIPanel(getglobal("BenillaScriptLogFrame"))</OnClick></Scripts>
            </Button>

            <!-- Declared BEFORE the rows so row text paints over the glow (the house z-tiebreak). -->
            <Frame name="BenillaScriptLogHighlightFrame" hidden="true">
                <Size><AbsDimension x="293" y="16"/></Size>
                <Anchors><Anchor point="TOPLEFT" relativePoint="TOPLEFT"/></Anchors>
                <Layers><Layer level="ARTWORK">
                    <Texture file="Interface\Buttons\UI-Listbox-Highlight2">
                        <Anchors><Anchor point="TOPLEFT"/><Anchor point="BOTTOMRIGHT"/></Anchors>
                    </Texture>
                </Layer></Layers>
            </Frame>

            <Button name="BenillaScriptLogRow1" inherits="BenillaScriptLogRowTemplate">
                <Anchors><Anchor point="TOPLEFT" relativePoint="TOPLEFT"><Offset><AbsDimension x="22" y="-94"/></Offset></Anchor></Anchors>
            </Button>
            <Button name="BenillaScriptLogRow2" inherits="BenillaScriptLogRowTemplate"><Anchors><Anchor point="TOPLEFT" relativeTo="BenillaScriptLogRow1" relativePoint="BOTTOMLEFT"/></Anchors></Button>
            <Button name="BenillaScriptLogRow3" inherits="BenillaScriptLogRowTemplate"><Anchors><Anchor point="TOPLEFT" relativeTo="BenillaScriptLogRow2" relativePoint="BOTTOMLEFT"/></Anchors></Button>
            <Button name="BenillaScriptLogRow4" inherits="BenillaScriptLogRowTemplate"><Anchors><Anchor point="TOPLEFT" relativeTo="BenillaScriptLogRow3" relativePoint="BOTTOMLEFT"/></Anchors></Button>
            <Button name="BenillaScriptLogRow5" inherits="BenillaScriptLogRowTemplate"><Anchors><Anchor point="TOPLEFT" relativeTo="BenillaScriptLogRow4" relativePoint="BOTTOMLEFT"/></Anchors></Button>
            <Button name="BenillaScriptLogRow6" inherits="BenillaScriptLogRowTemplate"><Anchors><Anchor point="TOPLEFT" relativeTo="BenillaScriptLogRow5" relativePoint="BOTTOMLEFT"/></Anchors></Button>
            <Button name="BenillaScriptLogRow7" inherits="BenillaScriptLogRowTemplate"><Anchors><Anchor point="TOPLEFT" relativeTo="BenillaScriptLogRow6" relativePoint="BOTTOMLEFT"/></Anchors></Button>
            <Button name="BenillaScriptLogRow8" inherits="BenillaScriptLogRowTemplate"><Anchors><Anchor point="TOPLEFT" relativeTo="BenillaScriptLogRow7" relativePoint="BOTTOMLEFT"/></Anchors></Button>
            <Button name="BenillaScriptLogRow9" inherits="BenillaScriptLogRowTemplate"><Anchors><Anchor point="TOPLEFT" relativeTo="BenillaScriptLogRow8" relativePoint="BOTTOMLEFT"/></Anchors></Button>
            <Button name="BenillaScriptLogRow10" inherits="BenillaScriptLogRowTemplate"><Anchors><Anchor point="TOPLEFT" relativeTo="BenillaScriptLogRow9" relativePoint="BOTTOMLEFT"/></Anchors></Button>
            <Button name="BenillaScriptLogRow11" inherits="BenillaScriptLogRowTemplate"><Anchors><Anchor point="TOPLEFT" relativeTo="BenillaScriptLogRow10" relativePoint="BOTTOMLEFT"/></Anchors></Button>
            <Button name="BenillaScriptLogRow12" inherits="BenillaScriptLogRowTemplate"><Anchors><Anchor point="TOPLEFT" relativeTo="BenillaScriptLogRow11" relativePoint="BOTTOMLEFT"/></Anchors></Button>
            <Button name="BenillaScriptLogRow13" inherits="BenillaScriptLogRowTemplate"><Anchors><Anchor point="TOPLEFT" relativeTo="BenillaScriptLogRow12" relativePoint="BOTTOMLEFT"/></Anchors></Button>

            <!-- The faux kit over the 13-row span; only its right-hand Slider renders. -->
            <ScrollFrame name="BenillaScriptLogListScrollFrame" inherits="FauxScrollFrameTemplate">
                <Size><AbsDimension x="293" y="208"/></Size>
                <Anchors><Anchor point="TOPLEFT" relativePoint="TOPLEFT"><Offset><AbsDimension x="22" y="-94"/></Offset></Anchor></Anchors>
            </ScrollFrame>

            <!-- The detail pane: the REAL scroll kit, because a message carries its `stack
                 traceback:` tail and is genuinely variable-height. GossipFrame's greeting pane is
                 the same wiring. -->
            <ScrollFrame name="BenillaScriptLogDetailScroll">
                <Size><AbsDimension x="293" y="128"/></Size>
                <Anchors><Anchor point="TOPLEFT" relativePoint="TOPLEFT"><Offset><AbsDimension x="22" y="-314"/></Offset></Anchor></Anchors>
                <Scripts>
                    <OnLoad>self:SetScrollChild(getglobal(self:GetName() .. "Child"))</OnLoad>
                    <OnMouseWheel>BenillaScroll_OnMouseWheel(self, arg1)</OnMouseWheel>
                    <OnVerticalScroll>BenillaScroll_SyncBar(self)</OnVerticalScroll>
                    <OnScrollRangeChanged>BenillaScroll_SyncBar(self)</OnScrollRangeChanged>
                </Scripts>
                <Frames>
                    <Slider name="$parentBar" inherits="BenillaScrollBarTemplate" hidden="true">
                        <Anchors>
                            <Anchor point="TOPLEFT" relativePoint="TOPRIGHT"><Offset><AbsDimension x="6" y="-16"/></Offset></Anchor>
                            <Anchor point="BOTTOMLEFT" relativePoint="BOTTOMRIGHT"><Offset><AbsDimension x="6" y="16"/></Offset></Anchor>
                        </Anchors>
                        <Scripts><OnValueChanged>BenillaScrollBar_OnValueChanged(self, arg1)</OnValueChanged></Scripts>
                    </Slider>
                    <Frame name="$parentChild">
                        <Size><AbsDimension x="293" y="128"/></Size>
                        <Anchors><Anchor point="TOPLEFT" relativePoint="TOPLEFT"/></Anchors>
                        <Layers>
                            <Layer level="ARTWORK">
                                <!-- 270 wide so the engine wraps the traceback rather than clipping
                                     it; the pane pans over whatever height that comes to. -->
                                <FontString name="BenillaScriptLogDetailText" inherits="GameFontHighlightSmall" justifyH="LEFT" justifyV="TOP" text="">
                                    <Size><AbsDimension x="270" y="0"/></Size>
                                    <Anchors><Anchor point="TOPLEFT" relativePoint="TOPLEFT"><Offset><AbsDimension x="6" y="-6"/></Offset></Anchor></Anchors>
                                </FontString>
                            </Layer>
                        </Layers>
                    </Frame>
                </Frames>
            </ScrollFrame>

            <Button name="BenillaScriptLogClearButton" inherits="UIPanelButtonTemplate" text="Clear">
                <Size><AbsDimension x="96" y="22"/></Size>
                <Anchors><Anchor point="TOPLEFT" relativePoint="TOPLEFT"><Offset><AbsDimension x="22" y="-455"/></Offset></Anchor></Anchors>
                <Scripts><OnClick>BenillaScriptLog_Clear()</OnClick></Scripts>
            </Button>
            <Button name="BenillaScriptLogCloseBottomButton" inherits="UIPanelButtonTemplate" text="Close">
                <Size><AbsDimension x="96" y="22"/></Size>
                <Anchors><Anchor point="TOPLEFT" relativePoint="TOPLEFT"><Offset><AbsDimension x="219" y="-455"/></Offset></Anchor></Anchors>
                <Scripts><OnClick>HideUIPanel(getglobal("BenillaScriptLogFrame"))</OnClick></Scripts>
            </Button>
        </Frames>
        <Scripts>
            <OnLoad>BenillaScriptLogFrame_OnLoad(self)</OnLoad>
            <!-- The list wheel lives on the WINDOW: the engine bubbles a spin up the parent chain
                 (CraftFrame's own note). The detail pane has its own, which wins over its own rect. -->
            <OnMouseWheel>BenillaScriptLogFrame_OnMouseWheel(arg1)</OnMouseWheel>
            <OnShow>BenillaScriptLog_Update()</OnShow>
            <OnUpdate>BenillaScriptLogFrame_OnUpdate()</OnUpdate>
        </Scripts>
    </Frame>
</Ui>