vanilla-wow-addons – Rev 1

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function GB_Spellbook_Initialize()
        if (not GB_INITIALIZED) then return; end
        GB_SpellBookPrevPageButton:Disable();
        GB_SPELLBOOKPAGE = 0;
        GB_SpellBookNextPageButton:Enable();
        GB_Spellbook_UpdatePage(1, 40); 
end

function GB_Spellbook_NextPage()
        GB_SPELLBOOKPAGE = GB_SPELLBOOKPAGE + 1;
        GB_SpellBookPrevPageButton:Enable();
        local start = 40 * GB_SPELLBOOKPAGE + 1;
        local finish = start + 39;
        GB_Spellbook_UpdatePage(start, finish);
end

function GB_Spellbook_PreviousPage()
        GB_SPELLBOOKPAGE = GB_SPELLBOOKPAGE - 1;
        GB_SpellBookNextPageButton:Enable();
        if (GB_SPELLBOOKPAGE == 0) then
                GB_SpellBookPrevPageButton:Disable();
        end
        local start = 40 * GB_SPELLBOOKPAGE + 1;
        local finish = start + 39;
        GB_Spellbook_UpdatePage(start, finish);
end

function GB_Spellbook_UpdatePage(start, finish)
        for x = start, finish do
                local boxnum = x - 40 * GB_SPELLBOOKPAGE;
                local spellbox = "GB_MiniSpellbook_Spell_"..boxnum;
                local spellname, spellrank = GetSpellName(x, "BOOKTYPE_SPELL");
                if (spellname) then
                        getglobal(spellbox):Show();
                        getglobal(spellbox):SetID(x);
                        local texture = GetSpellTexture(x, "BOOKTYPE_SPELL");
                        getglobal(spellbox.."_Texture"):SetTexture(texture);
                        if (spellrank) then
                                local rankstart = string.find(spellrank, " ");
                                if (rankstart) then
                                        local rank = string.sub(spellrank, rankstart + 1);
                                        if (rank ~= "Passive") then
                                                getglobal(spellbox.."_Rank"):SetText(rank);
                                        else
                                                getglobal(spellbox.."_Rank"):SetText("");
                                        end
                                else
                                        getglobal(spellbox.."_Rank"):SetText("");
                                end
                        else
                                getglobal(spellbox.."_Rank"):SetText("");
                        end
                else
                        getglobal(spellbox):Hide();
                        GB_SpellBookNextPageButton:Disable();
                end
        end
end

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