R/method-ggplot-add.R

In xiangpin/ggadd: An R Package To Add Geometric Layers On Circular Or Other Layout Tree Of "ggtree"

##' @method ggplot_add fruit_plot
##' @importFrom utils modifyList
##' @importFrom ggplot2 aes aes_ aes_string scale_color_manual
##' @importFrom rlang as_name quo_name
##' @importFrom ggnewscale new_scale_color
##' @author Shuangbin Xu
##' @export
ggplot_add.fruit_plot <- function(object, plot, object_name){
    object <- check_plotdata(object=object, plot=plot)
    object <- check_subset_aes(object=object)
    object <- build_new_data(object=object, plot=plot)
    object <- compute_aes(object=object, plot=plot)
    res <- set_mapping(object=object)
    object <- res[[1]]
    xid <- res[[2]]
    layout <- get_layout(plot)
    flagreverse <- check_reverse(plot=plot)
    if (layout %in% c("inward_circular", "dendrogram") || flagreverse){
        orientation <- -1
    }else{
        orientation <- 1
    }
    offset <- get_offset(plot$data, object$offset)
    if ("xmaxtmp" %in% colnames(plot$data)){
        hexpand2 <- max(abs(plot$data$xmaxtmp), na.rm=TRUE) + offset
    }else{
        hexpand2 <- max(abs(plot$data$x), na.rm=TRUE) + offset
    }
    dat <- object$data
    if (is.numeric(dat[[xid]]) && !all(dat[[xid]]==0)){
        normres <- get_continuous_norm(refdata=plot$data$x, 
                                       data=dat, 
                                       orientation=orientation,
                                       xid=xid, 
                                       position=object$params$position, 
                                       geomname=object$geomname,
                                       ratio=object$pwidth,
                                       nbreak=object$axis.params$nbreak, 
                                       limits = object$axis.params$limits
                                      )
        dat <- normres[[1]]
        newxexpand <- normres[[2]]
    }else{
        if (!is.numeric(dat[[xid]])){
            if (!is.factor(dat[[xid]])){
                dat[[xid]] <- factor(dat[[xid]], levels=sort(unique(as.vector(dat[[xid]]))))
            }
            dat[[paste0(xid,"_bp")]] <- as.numeric(dat[[xid]])
            if (stats::var(as.numeric(dat[[xid]]), na.rm = TRUE) !=0){
                dat[[paste0("new_", xid)]] <- orientation * 
                                              normxy(refnum=plot$data$x, targetnum=dat[[paste0(xid,"_bp")]],
                                                     keepzero=TRUE, ratio=object$pwidth)
            }else{
                dat[[paste0('new_', xid)]] <- 0
                object <- .set_pwidth2width(object)
            }
            if (orientation > 0){
                dat[[paste0("new_", xid)]] <- dat[[paste0("new_", xid)]] + offset
            }
            dat <- dat[order(-dat$y, dat[[paste0("new_", xid)]]),,drop=FALSE]
            newxexpand <- max(abs(dat[[paste0("new_", xid)]]), na.rm=TRUE)
        }else{
            if (!"hexpand" %in% names(object$params$position)){
                dat[[paste0("new_", xid)]] <- data.frame(plot$data, check.names=FALSE)[match(dat$label,plot$data$label),"x"]
            }else{
                dat[[paste0("new_", xid)]] <- 0
            }
            newxexpand <- 0
            object <- .set_pwidth2width(object)
        }
    }
    if (layout == 'dendrogram'){
        offset <- abs(offset)
    }
    if ("xmaxtmp" %in% colnames(plot$data)){
        plot$data$xmaxtmp <- plot$data$xmaxtmp + newxexpand + offset
    }else{
        plot$data$xmaxtmp <- plot$data$x + newxexpand + offset
    }
    if ("hexpand" %in% names(object$params$position)){
        if (is.na(object$params$position$hexpand)){
            if (orientation < 0 && layout!='dendrogram'){
                hexpand2 <- abs(hexpand2)
            }
            object$params$position$hexpand <- hexpand2
        }
    }
    tmpangle <- dat$angle
    if (object$geomname=="geom_star"){
        dat$angle <- adjust_angle(layout=layout, angle=tmpangle)
        object$mapping = modifyList(object$mapping, aes_(angle=~angle))
    }
    if (object$geomname=="geom_text"){
        dat$angle <- adjust_text_angle(layout=layout, angle=tmpangle)
        object$mapping = modifyList(object$mapping, aes_(angle=~angle))
    }
    if (object$geomname %in% c(dodpos, densitypos)){
        object$mapping = modifyList(object$mapping, aes(color=factor(eval(parse(text="y")))))
        plot <- plot + new_scale_color()
    }
    object$mapping = modifyList(object$mapping, aes_string(x=paste0("new_",xid)))
    params <- c(list(data=dat, mapping=object$mapping, inherit.aes=object$inherit.aes), object$params)
    obj <- do.call(object$geom, params)
    if (object$axis.params$axis != "none"){
        obj.axis <- build_axis(dat=dat,
                               xid=xid,
                               text=object$axis.params$text,
                               position=object$params$position,
                               axis.params=object$axis.params,
                               axis.dot.params=object$axis.dot.params,
                               y.range = range(plot$data$y))
        obj <- list(obj, obj.axis)
    }
    if (!is.null(object$grid.params)){
        obj.grid <- build_grid(dat=dat,
                               xid=xid,
                               position=object$params$position,
                               grid.params=object$grid.params,
                               grid.dot.params=object$grid.dot.params,
                               y.range = range(plot$data$y))
        obj <- list(obj.grid, obj)
    }
    # because original y is continuous, but y of box plot density plot is discrete
    # to combine them, should map y to group or color, but sometimes group box 
    # or density plot is also a demand, so group should not be mapped, 
    # only left color.
    if (object$geomname %in% c(dodpos, densitypos)){
        .generate_colour_warning(plot)
        obj <- list(obj, scale_color_manual(values=c(rep("black", length(dat$y))), guide="none"), new_scale_color())
    }
    ggplot_add(obj, plot, object_name)
}

##' @method ggplot_add layer_fruits
##' @author Shuangbin Xu
##' @export
ggplot_add.layer_fruits <- function(object, plot, object_name){
    offset <- get_offset(plot$data, object[[1]]$offset)
    if ("xmaxtmp" %in% colnames(plot$data)){
        hexpand2 <- max(abs(plot$data$xmaxtmp), na.rm=TRUE) + offset
    }else{
        hexpand2 <- max(abs(plot$data$x), na.rm=TRUE) + offset
    }
    n = 0
    for (o in object){
        n = n + 1
        if (inherits(o, "fruit_plot")){
            offset.i <- get_offset(plot$data, o$offset)
            if (offset != offset.i && n != 1){
                cli::cli_alert_warning(c("The {.arg offset} argument of {.fun geom_fruit} layers in {.fun geom_fruit_list} is different.", 
                              "Please keep it consistent if you want to display these layers on the same position."))
                hexpand2 <- max(abs(plot$data$x), na.rm=TRUE) + offset.i
            }
            o[["params"]][["position"]][["hexpand"]] <- hexpand2
        }
        plot <- plot + o
        if ("xmaxtmp" %in% colnames(plot$data) && n == 1){
            tmpxmax <- plot$data$xmaxtmp
        }
        if (!"xmaxtmp" %in% colnames(plot$data)){
            tmpxmax <- plot$data$x + hexpand2
        }
    }
    plot$data$xmaxtmp <- tmpxmax
    plot
}

create_text_data <- function(data, origin, newxid, flagrev){
    if (!is.numeric(data[[origin]]) || sum(diff(data[[origin]])) == diff(range(data[[origin]]))){
        data <- data[!duplicated(data),,drop=FALSE]
    }else{
        if (flagrev){
            data[[origin]] <- rev(data[[origin]])
        }
    }
    return (data)
}

#' @importFrom cli cli_abort
check_plotdata <- function(object, plot){
    if (is.null(object$data)){
        object$mapping <- modifyList(object$mapping, aes_(y=~y))
        object$data <- plot$data[plot$data$isTip,]
                                 #!colnames(plot$data) %in% c("parent", "node", "branch.length", "isTip", "x", "branch"), 
                                 #drop=FALSE]
        object$datanull <- TRUE
    }else if (is.function(object$data)){
        object$data <- object$data(plot$data)
        if (!is.data.frame(object$data)){
            cli_abort("Data function must return a data.frame")
        }
        object$data <- object$data[object$data$isTip,]
        object$mapping <- modifyList(object$mapping, aes_(y=~y))
        object$datanull <- TRUE
    }else{
        object$datanull <- FALSE
    }
    return (object)
}

get_offset <- function(da, ratio){
    vnum <- da$x
    tmp <- max(vnum, na.rm=TRUE) - min(vnum, na.rm=TRUE)
    flag <- da[da$isTip, 'x',drop=TRUE] <= 0
    if (all(flag)){
        offset <- -tmp - ratio * tmp
    }else{
        offset <- ratio * tmp
    }
    return(offset)
}

build_new_data <- function(object, plot){
    if (inherits(object$data, "data.frame") && !object$datanull){
        origindata <- plot$data[plot$data$isTip, !colnames(plot$data) %in% c("parent", "node", "branch.length", "isTip", "x", "branch")]
        commonnames <- intersect(colnames(object$data), colnames(origindata)) 
        commonnames <- commonnames[commonnames!=as_name(object$mapping$y)]
        if (length(commonnames) > 0){
            cli::cli_alert_warning(c("The following column names/name: ", paste0(commonnames, collapse=", "),
                         " are/is the same to tree data, the tree data column names are : ",
                         paste0(colnames(origindata), collapse=", "), "."))
        }
        object$data <- merge(origindata, object$data, by.x="label", by.y=as_name(object$mapping$y))
        object$mapping <- modifyList(object$mapping, aes_(y=~y))
    }
    object$datanull <- NULL
    return(object)
}

adjust_angle <- function(layout, angle){
    if (!layout %in% c("rectangular", "slanted")){
        angle <- 90 - angle
    }else{
        angle <- 90
    }
    return(angle)
}

adjust_text_angle <- function(layout, angle){
    if (!layout %in% c("rectangular", "slanted")){
        angle <- unlist(lapply(angle, function(i)
                               {if (i>90 && i<270){
                                   i <- i - 180}
                               return(i)}))
    }else{
        angle <- 0
    }
    return(angle)
}

choose_pos <- function(object){
    geomname <- object$geomname
    if (is.character(object$position) && object$position=="auto"){
        if (geomname %in% dodpos){
            object$params <- c(object$params, position=position_dodgex())
        }
        if (geomname %in% idepos){
            object$params <- c(object$params, position=position_identityx())
        }
        if (geomname %in% stackpos){
            object$params <- c(object$params, position=position_stackx())
        }
        if (geomname %in% densitypos){
            object$params <- c(object$params, position=position_points_sinax())
        }
    }else{
        object$params <- c(object$params, position=object$position)
    }
    return(object)
}

dodpos <- c("geom_boxplot", "geom_violin", "geom_boxplot_pattern", 
            "geom_violin_pattern", "geom_boxploth", "geom_violinh")

idepos <- c("geom_dots", "geom_dotsinterval", "geom_pointinterval",
            "geom_slab", "geom_slabinterval", "geom_image", "geom_phylopic",
            "geom_point", "geom_tile", "geom_text", "geom_label", "geom_raster",
            "geom_plot", "geom_table", "geom_star", "geom_symbol", 
            "geom_tile_pattern", "geom_scatterpie",
            "geom_text_repel", "geom_label_repel",
            "geom_msa", "geom_richtext", "geom_ridgeline",
            "geom_ridgeline_gradient")

stackpos <- c("geom_bar", "geom_barh", "geom_bar_pattern", "geom_col", "geom_colh", "geom_col_pattern")

densitypos <- c("geom_density_ridges", "geom_density_ridges2", "geom_density_ridges_gradient")

check_reverse <- function(plot){
    flag <- unlist(lapply(plot$scales$scales, 
                          function(x){
                           inherits(x, "ScaleContinuousPosition") && x$aesthetics[1]=="x"
                          }))
    if (!all(flag)){return(FALSE)}
    flag <- plot$scales$scales[[which(flag)]]$trans$name=="reverse" && inherits(plot$coordinates, "CoordPolar")
    #flag2 <- inherits(plot$coordinates, "CoordPolar") || inherits(plot$coordinates, "CoordFlip")
    #flag <- flag1 && flag2
    if (is.na(flag)){return(FALSE)}
    return(flag)
}

#' @importFrom utils getFromNamespace
#warning_wrap <- getFromNamespace("warning_wrap", "ggplot2")
#warning_wrap <- function (...) {
#    x = paste0(...)
#    x = paste(strwrap(x), collapse = "\n")
#    warning(x, call. = FALSE)
#}