[Bug]: strange title wrapping for grobs

[BFalquet]

What happened?

example:

library(chevron)
library(citril)

# Create a list of ggplot objects
graph <- chevron::run(chevron::mng01, chevron::syn_data, dataset = "adlb")

# decorate with a long title and subtitle
res <- decorate_tlg(
        graph,
        main = append_filter_title(
          paste("My", paste(rep("very", 55), collapse = " "), "long title"),
          suffix = c("PP", "SE", "CNCM", "PAXIS"),
          targets = c("adsl", "adcm")
        ),
        sub = paste("My", paste(rep("very", 55), collapse = " "), "long subtitle"),
        footnote = paste("My", paste(rep("very", 100), collapse = " "), "long footnote"),
        sup_footnote = paste("My", paste(rep("very", 100), collapse = " "), "long supplementary footnote")
      )


# extract the title from the grob
lab <- res[[1]]$children$titles_grob_footnotes$children[[1]]$label

# the length of the individual lines in the title has changes and is a bit surprising
    wrapped_lab <- stringr::str_split(lab, "\\n", simplify = FALSE)
    expect_identical(nchar(wrapped_lab[[1]]), c(182L, 180L, 182L, 108L))


# Error: nchar(wrapped_lab[[1]]) (`actual`) not identical to c(182L, 180L, 182L, 108L) (`expected`).
#
#  `actual`: 172 166  23 147 143
#  `expected`: 182 180 182 108   

The error seems to arise in tern::decorate_grob_set(), the concatenation of the title and subtitle let the system think that the line is longer than it actually is.

thank you for the help

sessionInfo()

R version 4.3.1 (2023-06-16 ucrt)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 11 x64 (build 22621)

Matrix products: default


locale:
[1] LC_COLLATE=English_Switzerland.utf8  LC_CTYPE=English_Switzerland.utf8    LC_MONETARY=English_Switzerland.utf8 LC_NUMERIC=C                        
[5] LC_TIME=English_Switzerland.utf8    

time zone: Europe/Zurich
tzcode source: internal

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] citril_0.1.12.9012 testthat_3.1.10   

loaded via a namespace (and not attached):
 [1] tidyselect_1.2.0           dplyr_1.1.2                farver_2.1.1               R.utils_2.12.2             fastmap_1.1.1              vdiffr_1.0.7              
 [7] digest_0.6.33              timechange_0.2.0           lifecycle_1.0.3            waldo_0.5.1                ellipsis_0.3.2             survival_3.5-5            
[13] processx_3.8.2             magrittr_2.0.3             compiler_4.3.1             rlang_1.1.1                tools_4.3.1                utf8_1.2.3                
[19] yaml_2.3.7                 prettyunits_1.1.1          labeling_0.4.2             pkgbuild_1.4.2             pkgload_1.3.2.1            R.cache_0.16.0            
[25] withr_2.5.0                purrr_1.0.1                rlistings_0.2.9.9002       desc_1.4.2                 R.oo_1.25.0                grid_4.3.1                
[31] fansi_1.0.4                diffobj_0.3.5              colorspace_2.1-0           nestcolor_0.1.2.9014       ggplot2_3.5.1              scales_1.3.0              
[37] cli_3.6.1                  crayon_1.5.2               generics_0.1.3             remotes_2.4.2              rstudioapi_0.15.0          sessioninfo_1.2.2         
[43] cachem_1.0.8               stringr_1.5.0              splines_4.3.1              vctrs_0.6.3                devtools_2.4.5.9000        Matrix_1.6-0              
[49] jsonlite_1.8.7             dunlin_0.1.7.9007          tern_0.9.5.9013            callr_3.7.3                tidyr_1.3.0                rtables_0.6.9.9007        
[55] formatters_0.5.8.9003      glue_1.6.2                 rematch2_2.1.2             ps_1.7.5                   cowplot_1.1.1              lubridate_1.9.2           
[61] stringi_1.7.12             gtable_0.3.3               munsell_0.5.0              tibble_3.2.1               styler_1.10.3              pillar_1.9.0              
[67] htmltools_0.5.5            brio_1.1.3                 citril.metadata_0.1.7.9003 R6_2.5.1                   Rdpack_2.4                 rprojroot_2.0.3           
[73] lattice_0.21-8             rbibutils_2.2.13           R.methodsS3_1.8.2          backports_1.4.1            memoise_2.0.1              broom_1.0.5               
[79] checkmate_2.2.0            chevron_0.2.6.9013         fs_1.6.2                   forcats_1.0.0              usethis_2.2.2              pkgconfig_2.0.3

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[shajoezhu]

I feel I have seen this error before