IsActionInRange(slot) checks if the spell on an action bar slot is within
range of the current target, using DBC spell range data and entity positions.
Returns 1/0/nil matching the WoW API contract.
GetActionInfo(slot) returns action type ("spell"/"item"/"macro"), id, and
subType for action bar interrogation by bar addons.
GetActionCount(slot) returns item stack count across backpack and bags for
consumable tracking on action bars.
Expose cast/channel state to Lua addons via UnitCastingInfo(unit) and
UnitChannelInfo(unit), matching the WoW API signature (name, text, texture,
startTime, endTime, isTradeSkill, castID, notInterruptible). Works for
player, target, focus, and pet units using existing UnitCastState tracking.
Also fix handleCastFailed (SMSG_CAST_FAILED, Classic/TBC path) to fire
UNIT_SPELLCAST_FAILED and UNIT_SPELLCAST_STOP events — previously only
the WotLK SMSG_CAST_RESULT path fired these, leaving Classic/TBC addons
unaware of cast failures.
Adds isChannel field to UnitCastState and getCastTimeTotal() accessor.
Returns squared distance between the player and a unit, plus a boolean
indicating whether the calculation was possible. Squared distance
avoids sqrt for efficient range comparisons.
Used by DBM, BigWigs, and proximity warning addons for raid encounter
range checks (e.g., "spread 10 yards" mechanics).
Returns true if the player is within interaction distance of a unit:
- Index 1: Inspect range (28 yards)
- Index 2: Trade range (11 yards)
- Index 3: Duel range (10 yards)
- Index 4: Follow range (28 yards)
Used by trade addons, inspect addons, and proximity detection addons.
Returns 1 if the spell can reach the target, 0 if out of range, nil
if range can't be determined. Compares player-to-target distance against
the spell's maxRange from Spell.dbc via SpellDataResolver.
Used by healing addons (Healbot, VuhDo, Clique) to check if heals can
reach party members, and by action bar addons for range coloring.
Returns true when the unit's entity exists in the entity manager
(within UPDATE_OBJECT range). Unlike UnitExists which falls back to
party member data, UnitIsVisible only returns true for entities that
can actually be rendered on screen.
Used by nameplate addons and proximity addons to check if a unit is
within visual range.
Session 14 commit #100: 95 new API functions, 113 new events.
Returns "TANK", "HEALER", "DAMAGER", or "NONE" based on the WotLK LFG
roles bitmask from SMSG_GROUP_LIST. Used by raid frame addons (Grid,
VuhDo, Healbot) to display role icons next to player names.
UnitCanAttack(unit, otherUnit): returns true if otherUnit is hostile
(attackable). UnitCanCooperate(unit, otherUnit): returns true if
otherUnit is friendly (can receive beneficial spells).
Used by nameplate addons for coloring and by targeting addons for
filtering hostile/friendly units.
Returns the creature family name (Wolf, Cat, Bear, etc.) for NPC units.
Data from CreatureInfo cache (creature_template family field). Used by
hunter pet management addons and tooltips that show pet family info.
Enhance RAID_CLASS_COLORS entries with colorStr hex string field and
GenerateHexColor()/GenerateHexColorMarkup() methods. Many addons
(Prat, Details, oUF) use colorStr to build colored chat text and
GenerateHexColor for inline color markup.
Returns a table of power cost entries: {{ type=powerType, cost=amount,
name=powerName }}. Data from SpellDataResolver (Spell.dbc ManaCost and
PowerType fields). Used by spell tooltip addons and action bar addons
that display mana/rage/energy costs.
Returns true when the player is on a taxi/flight path. Used by action
bar addons to disable abilities during flight and by map addons to
track taxi state.
Previously UnitIsDead returned false for out-of-range party members
(entity not in entity manager). Now checks curHealth==0 from
SMSG_PARTY_MEMBER_STATS data, so raid frame addons correctly show
dead members in other zones as dead.
Previously UnitPowerType returned 0 (MANA) for party members who are
out of entity range. Now falls back to SMSG_PARTY_MEMBER_STATS power
type data, so raid frame addons correctly color rage/energy/runic
power bars for distant party members.
Implement UnitDetailedThreatSituation(unit, mobUnit) returning:
- isTanking (boolean)
- status (0-3, same as UnitThreatSituation)
- threatPct (100 if tanking, 0 otherwise)
- rawThreatPct (same)
- threatValue (0 — no server threat data available)
Used by Omen and other threat meter addons that query detailed threat
info per mob-target pair.
Implement UnitThreatSituation(unit, mobUnit) returning 0-3 threat level:
- 0: not on threat table
- 1: in combat but not tanking (mob targeting someone else)
- 3: securely tanking (mob is targeting this unit)
Approximated from mob's UNIT_FIELD_TARGET to determine who the mob is
attacking. Used by threat meter addons (Omen, ThreatPlates) and tank
UI addons to display threat state.
Add three tapped-state query functions for addons:
- UnitIsTapped(unit): true if any player has tagged the mob
- UnitIsTappedByPlayer(unit): true if local player can loot (tapped+lootable)
- UnitIsTappedByAllThreatList(unit): true if shared-tag mob
Used by nameplate addons (Plater, TidyPlates) and unit frame addons
to determine and display tap ownership state.
Extend the Lua error UI display to cover all error paths:
- OnUpdate frame callbacks (previously only logged)
- executeFile loading errors (now also shown as UI error)
- executeString /run errors (now also shown as UI error)
This ensures addon developers see ALL Lua errors in-game, not just
event handler errors from the previous commit.
Previously Lua addon errors only logged to the log file. Now they
display as red UI error text to the player (same as spell errors and
game warnings), helping addon developers debug issues in real-time.
Add LuaErrorCallback to LuaEngine, fire it from event handler and
frame OnEvent pcall error paths. Wire the callback to GameHandler's
addUIError in application.cpp.
Implement GetAddOnMetadata(addonNameOrIndex, key) which reads arbitrary
TOC file directives. All directives are now stored in the addon info
registry table under a "metadata" sub-table.
This enables addons to read their own version, author, X-* custom
fields, and other TOC metadata at runtime. Used by addon managers,
version checkers, and self-updating addons.
Fire RAID_TARGET_UPDATE event when raid markers (skull, cross, etc.)
are set or cleared on targets. Add two Lua API functions:
- GetRaidTargetIndex(unit) returns marker index 1-8 (or nil)
- SetRaidTarget(unit, index) sets marker 1-8 (or 0 to clear)
Enables raid marking addons and nameplate addons that display raid
icons to react to marker changes in real-time.
IsUsableAction previously always returned notEnoughMana=false. Now it
checks the spell's mana cost from SpellDataResolver against the player's
current power, matching the same fix applied to IsUsableSpell.
This fixes action bar addons (Bartender, Dominos) incorrectly showing
abilities as usable when the player lacks mana/rage/energy.
Extend SpellDataInfo with manaCost and powerType fields, extracted from
Spell.dbc ManaCost and PowerType columns. This enables IsUsableSpell()
to properly check if the player has enough mana/rage/energy to cast.
Previously IsUsableSpell always returned notEnoughMana=false since cost
data wasn't available. Now it compares the spell's DBC mana cost against
the player's current power, returning accurate usability and mana state.
This fixes action bar addons showing abilities as usable when the player
lacks sufficient power, and enables OmniCC-style cooldown text to
properly dim insufficient-power abilities.
Add SpellDataResolver that lazily loads Spell.dbc, SpellCastTimes.dbc,
and SpellRange.dbc to provide cast time and range data. GetSpellInfo()
now returns real castTime (ms), minRange, and maxRange instead of
hardcoded 0 values.
This enables spell tooltip addons, cast bar addons (Quartz), and range
check addons to display accurate spell information. The DBC chain is:
Spell.dbc[CastingTimeIndex] → SpellCastTimes.dbc[Base ms]
Spell.dbc[RangeIndex] → SpellRange.dbc[MinRange, MaxRange]
Follows the same lazy-loading pattern as SpellIconPathResolver and
ItemIconPathResolver.
Add playerClassRaceCache_ that stores classId and raceId from
SMSG_NAME_QUERY_RESPONSE. This enables UnitClass and UnitRace to return
correct data for players who were previously seen but are now out of
UPDATE_OBJECT range.
Fallback chain for UnitClass/UnitRace is now:
1. Entity update fields (UNIT_FIELD_BYTES_0) — for nearby entities
2. Name query cache — for previously queried players
3. getPlayerClass/Race() — for the local player
This improves class-colored names in chat, unit frames, and nameplates
for players who move out of view range.
Previously UnitHealth, UnitHealthMax, UnitPower, UnitPowerMax, UnitLevel,
UnitName, and UnitExists returned 0/"Unknown"/false for party members in
other zones because the entity doesn't exist in the entity manager.
Now these functions fall back to SMSG_PARTY_MEMBER_STATS data stored in
GroupMember structs, which provides health, power, level, and name for
all party members regardless of distance. UnitName also falls back to
the player name cache.
This fixes raid frame addons (Grid, Healbot, VuhDo) showing blank/zero
data for party members who are out of UPDATE_OBJECT range.
Add 6 commonly needed unit state functions:
- UnitIsGhost(unit) checks ghost flag from UNIT_FIELD_FLAGS
- UnitIsDeadOrGhost(unit) combines dead + ghost checks
- UnitIsAFK(unit) / UnitIsDND(unit) check player flags
- UnitPlayerControlled(unit) true for players and player pets
- UnitSex(unit) reads gender from UNIT_FIELD_BYTES_0 byte 2
Fix UnitAffectingCombat to check UNIT_FLAG_IN_COMBAT (0x00080000)
from entity update fields for any unit, not just "player". Previously
returned false for all non-player units.
These functions are needed by unit frame addons (SUF, Pitbull, oUF)
to properly display ghost state, AFK/DND status, and combat state.
Previously UnitClass() only returned the correct class for "player" and
returned "Unknown" for all other units (target, focus, party1-4, etc.).
UnitRace() had the same bug.
Now both functions read UNIT_FIELD_BYTES_0 from the entity's update
fields to resolve class (byte 1) and race (byte 0) for any unit. This
fixes unit frame addons, class-colored names, and race-based logic for
all unit IDs.
Also fix UnitRace to return 3 values (localized, English, raceId) to
match WoW's API signature — previously it only returned 1.
Implement 5 guild-related WoW Lua API functions:
- IsInGuild() returns whether the player is in a guild
- GetGuildInfo("player") returns guildName, rankName, rankIndex
- GetNumGuildMembers() returns totalMembers, onlineMembers
- GetGuildRosterInfo(index) returns full 11-value tuple: name, rank,
rankIndex, level, class, zone, note, officerNote, online, status, classId
- GetGuildRosterMOTD() returns the guild message of the day
Data sourced from SMSG_GUILD_ROSTER and SMSG_GUILD_QUERY_RESPONSE.
Enables guild management addons (GreenWall, officer tools, roster UIs).
Implement the addon messaging API used by virtually every multiplayer
addon (DBM, BigWigs, EPGP, RC Loot Council, WeakAuras, etc.):
- SendAddonMessage(prefix, text, chatType, target) sends an addon
message encoded as "prefix\ttext" via the appropriate chat channel
- RegisterAddonMessagePrefix(prefix) registers a prefix for filtering
incoming addon messages
- IsAddonMessagePrefixRegistered(prefix) checks registration status
- C_ChatInfo table with aliases for the above functions (newer API compat)
Without these functions, all inter-addon communication between players
fails, breaking boss mods, loot distribution, and group coordination.
Implement friend and ignore list query functions for social addons:
- GetNumFriends() returns friend count from contacts list
- GetFriendInfo(index) returns 7-value tuple: name, level, class, area,
connected, status (AFK/DND), note
- GetNumIgnores() returns ignore count
- GetIgnoreName(index) returns ignored player's name
Data sourced from the contacts list populated by SMSG_FRIEND_LIST and
SMSG_CONTACT_LIST. Area names resolved from AreaTable.dbc.
Add ItemIconPathResolver that lazily loads ItemDisplayInfo.dbc to map
displayInfoId → icon texture path. This fixes three Lua API functions
that previously returned nil for item icons:
- GetItemInfo() field 10 (texture) now returns the icon path
- GetActionTexture() for item-type action bar slots now returns icons
- GetLootSlotInfo() field 1 (texture) now returns proper item icons
instead of incorrectly using the spell icon resolver
Follows the same lazy-loading pattern as SpellIconPathResolver. The DBC
is loaded once on first query and cached for all subsequent lookups.
Add commonly called frame methods as no-ops or with basic state tracking
on the frame metatable, so any CreateFrame result supports them:
Layout: SetFrameLevel/Get, SetFrameStrata/Get, SetScale/Get/GetEffective,
ClearAllPoints, SetID/GetID, GetLeft/Right/Top/Bottom, GetNumPoints,
GetPoint, SetHitRectInsets
Behavior: EnableMouse, EnableMouseWheel, SetMovable, SetResizable,
RegisterForDrag, SetClampedToScreen, SetToplevel, Raise, Lower,
StartMoving, StopMovingOrSizing, RegisterForClicks, IsMouseOver
Visual: SetBackdrop, SetBackdropColor, SetBackdropBorderColor
Scripting: HookScript (chains with existing SetScript handlers),
SetAttribute/GetAttribute, GetObjectType
Sizing: SetMinResize, SetMaxResize
These prevent the most common addon errors when addons call standard
WoW frame methods on CreateFrame results.
Add commonly used WoW global utility functions that many addons depend on:
Table: tContains, tInvert, CopyTable, tDeleteItem
String: strupper, strlower, strfind, strsub, strlen, strrep, strbyte,
strchar, strrev, gsub, gmatch, strjoin
Math: Clamp, Round
Bit ops: bit.band, bit.bor, bit.bxor, bit.bnot, bit.lshift, bit.rshift
(pure Lua implementation for Lua 5.1 which lacks native bit ops)
These prevent nil-reference errors and missing-function crashes in
addons that use standard WoW utility globals.
Add the UIDropDownMenu compatibility framework used by virtually every
addon with settings or selection menus: UIDropDownMenu_Initialize,
CreateInfo, AddButton, SetWidth, SetText, GetText, SetSelectedID, etc.
Add global font object stubs (GameFontNormal, GameFontHighlight, etc.)
referenced by CreateFontString template arguments.
Add UISpecialFrames table, InterfaceOptionsFrame for addon panels,
InterfaceOptions_AddCategory, and common font color constants
(GRAY_FONT_COLOR, NORMAL_FONT_COLOR, etc.).
These globals prevent nil-reference errors in most popular addons.
Implement 5 talent-related WoW Lua API functions:
- GetNumTalentTabs() returns class-specific talent tree count (usually 3)
- GetTalentTabInfo(tab) returns name, icon, pointsSpent, background
- GetNumTalents(tab) returns talent count in a specific tree
- GetTalentInfo(tab, index) returns full 8-value tuple with name, tier,
column, current rank, max rank, and availability
- GetActiveTalentGroup() returns active spec (1 or 2)
Data sourced from Talent.dbc, TalentTab.dbc, and the server-sent talent
info packet. Enables talent addons and spec display addons.
Implement skill line API functions that profession and tradeskill addons
need to display player skills:
- GetNumSkillLines() returns count of player skills
- GetSkillLineInfo(index) returns full 12-value tuple: name, isHeader,
isExpanded, rank, tempPoints, modifier, maxRank, isAbandonable, etc.
Data comes from SMSG_SKILLS_INFO update fields and SkillLine.dbc names.
Implement LibStub — the universal library version management system that
virtually every WoW addon framework depends on (Ace3, LibDataBroker,
LibSharedMedia, etc.). Without LibStub, most popular addons fail to load.
Also implement CallbackHandler-1.0 — the standard event callback library
used by Ace3-based addons for inter-module communication. Supports
RegisterCallback, UnregisterCallback, UnregisterAllCallbacks, and Fire.
These two libraries unlock the entire Ace3 addon ecosystem.
Implement 3 critical gameplay Lua API functions:
- UseAction(slot) activates an action bar slot (spell/item), enabling
action bar addons like Bartender/Dominos to fire abilities
- CancelUnitBuff("player", index) cancels a buff by index, enabling
auto-cancel and buff management addons
- CastSpellByID(id) casts a spell by numeric ID, enabling macro addons
and spell queuing systems
Fix GetScreenWidth/GetScreenHeight/GetNumLootItems/GetFramerate being
overridden by hardcoded Lua stubs that ran after the C functions were
registered. Now the real C implementations correctly take effect.
Add GameTooltip global frame with 20+ methods (SetOwner, ClearLines,
AddLine, AddDoubleLine, SetText, NumLines, GetText, SetHyperlink, etc.)
and ShoppingTooltip1/2 — critical for virtually all WoW addons.
Add frame:CreateTexture() and frame:CreateFontString() methods returning
stub objects with common API methods, enabling UI creation addons.
Add real GetFramerate() returning actual FPS from ImGui.
Support compound unit IDs that resolve an entity's current target via
UNIT_FIELD_TARGET_LO/HI update fields. This enables addons to query
target-of-target info (e.g., UnitName("targettarget"), UnitHealth("focustarget"))
which is essential for threat meters and unit frame addons.
Implement 10 new WoW Lua API functions for addon compatibility:
- GetComboPoints, UnitReaction, UnitIsConnected for unit frames/raid addons
- HasAction, GetActionTexture, IsCurrentAction, IsUsableAction, GetActionCooldown
for action bar addons (Bartender, Dominos, etc.)
- UnitMana/UnitManaMax as Classic-era aliases for UnitPower/UnitPowerMax
Add "mouseover" as a valid unit ID in resolveUnitGuid so Lua API functions
like UnitName("mouseover"), UnitHealth("mouseover") etc. work for addons.
Fire UPDATE_MOUSEOVER_UNIT event when the mouseover target changes, and
PLAYER_FOCUS_CHANGED event when focus is set or cleared.
Formats copper amounts into "Xg Ys Zc" strings for addon display.
GetCoinText is aliased to GetCoinTextureString. Used by money display
addons (Titan Panel, MoneyFu) and auction/vendor price formatting.
